REINWARDTIA A JOURNAL ON TAXONOMIC BOTANY, PLANT SOCIOLOGY AND ECOLOGY Vol. 14(1): 1 - 2 4 8 , December 23, 2014 Chief Editor Kartini Kramadibrata (Mycologist, Herbarium Bogoriense, Indonesia) Editors Dedy Darnaedi (Taxonomist, Herbarium Bogoriense, Indonesia) Tukirin Partomihardjo (Ecologist, Herbarium Bogoriense, Indonesia) Joeni Setijo Rahajoe (Ecologist, Herbarium Bogoriense, Indonesia) Marlina Ardiyani (Taxonomist, Herbarium Bogoriense, Indonesia) Topik Hidayat (Taxonomist, Indonesia University of Education, Indonesia) Eizi Suzuki (Ecologist, Kagoshima University, Japan) Jun Wen (Taxonomist, Smithsonian Natural History Museum, USA) Managing Editor Himmah Rustiami (Taxonomist, Herbarium Bogoriense, Indonesia) Lulut Dwi Sulistyaningsih (Taxonomist, Herbarium Bogoriense, Indonesia) Secretary Endang Tri Utami Layout Editor Deden Sumirat Hidayat Medi Sutiyatno Illustrators Subari Wahyudi Santoso Anne Kusumawaty Correspondence on editorial matters and subscriptions for Reinwardtia should be addressed to: HERBARIUM BOGORIENSE, BOTANY DIVISION, RESEARCH CENTER FOR BIOLOGY- INDONESIAN INSTITUTE OF SCIENCES CIBINONG SCIENCE CENTER, JLN. RAYA JAKARTA - BOGOR KM 46, CIBINONG 16911, P.O. Box 25 Cibinong INDONESIA PHONE (+62) 21 8765066; Fax (+62) 21 8765062 E-MAIL: reinwardtia@mail.lipi.go.id 1 2 3 4 1 3 4 4 Cover images: 1. Begonia holosericeoides (female flower and habit) (Begoniaceae; Ardi et al.); 2. Abaxial cuticles of Alseodaphne rhododendropsis (Lauraceae; Nishida & van der Werff); 3. Dipo- dium puspitae, Dipodium purpureum (Orchidaceae; O'Byrne); 4. Agalmyla exannulata, Cyrtandra coccinea var. celebica, Codonoboea kjellbergii (Gesneriaceae; Kartonegoro & Potter). The Editors would like to thanks all reviewers of volume 14(1): Abdulrokhman Kartonegoro - Herbarium Bogoriense, Bogor, Indonesia Altafhusain B. Nadaf - University of Pune, Pune, India Amy Y. Rossman - Systematic Mycology & Microbiology Laboratory USDA-ARS, Beltsville, USA Andre Schuiteman - Royal Botanic Gardens, Kew, UK Ary P. Keim - Herbarium Bogoriense, Bogor, Indonesia Barry Conn - Royal Botanic Gardens National Herbarium of New South Wales, Sydney, Australia Dato' Abdul Latiff Mohamad - Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia Daniel Potter - Department of Plant Sciences, University of California, Davis, California, USA Deby Arifiani - Herbarium Bogoriense, Bogor, Indonesia Ferry J. W. Slik - University of Brunei Darussalam, Brunei Henti H. Rachmat - Conservation and Rehabilitation Research and Development Center, Bogor, Indonesia Ian M. Turner - Royal Botanic Gardens, Kew, UK Iskandar Z. Siregar - Bogor Agricultural University, Bogor, Indonesia Jay H. Bernstein - Kingsborough Community College, Brooklyn, New York, USA Jens G. Rohwer - University of Hamburg, Hamburg, Germany Joan Pereira - SAN Herbarium, Sabah Forestry Department, Sabah, Malaysia Kuswata Kartawinata - Herbarium Bogoriense, Bogor, Indonesia Lars H. Schmidt - University of Copenhagen, Copenhagen, Denmark Mark Hughes - Royal Botanic Gardens, Edinburgh, UK Masahiro Kato - Kyoto University, Kyoto, Japan Nuril Hidayati - Herbarium Bogoriense, Bogor, Indonesia Ong Poh Teck - Forest Research Institute Malaysia, Kepong, Malaysia Peter C. van Welzen - National Herbarium Netherlands, Leiden University Branch, Leiden, Netherlands Reuben Nilus - Sabah Forestry Department, Sabah, Malaysia Rugayah - Herbarium Bogoriense, Bogor, Indonesia Ruth Kiew - Forest Research Institute of Malaysia, Kepong, Malaysia Uwe Braun - Institut fur Biologie Bereich Geobotanik und Botanischer Garten, Halle (Saale), Germany Yasuaki Sato - Osaka-Sangyo University, Osaka, Japan REINWARDTIA Vol 14, No 1, pp: 73 − 78 73 THE DIVERSITY AND ABUNDANCE OF GROUND HERBS IN LOWLAND MIXED DIPTEROCARP FOREST AND HEATH FOREST IN BRUNEI DARUSSALAM Received December 28, 2013; accepted June 3, 2014 NURUL HAZLINA ZAINI Environmental and Life Sciences Programme, Faculty of Science, Universiti Brunei Darussalam, Jln. Tungku Link, BE 1410, Brunei Darussalam. RAHAYU SUKMARIA SUKRI Environmental and Life Sciences Programme, Faculty of Science, Universiti Brunei Darussalam, Jln. Tungku Link, BE 1410, Brunei Darussalam. E-mail: rahayu.sukri@ubd.edu.bn ABSTRACT ZAINI, N. H. & SUKRI, R. S. 2014. The diversity and abundance of ground herbs in lowland mixed dipterocarp forest and heath forest in Brunei Darussalam. Reinwardtia 14(1): 73 – 78. ― Herbaceous plants are important components of total plant species richness in tropical forests. Ground herb diversity and abundance were studied in a lowland Mixed Dipterocarp forest (Andulau) and a heath forest (Bukit Sawat) in Brunei Darussalam, Borneo. At each site, all ground herbs in twenty randomly selected 10 × 10 m subplots within a one hectare permanent plot were censused and identified. The study recorded a total of 20 families and 32 genera of ground herbs, with the family Zingiberaceae as the most abundant at both sites. Thirteen genera were recorded only at Andulau and 7 genera were exclusive to Bukit Sawat, with twelve genera common to both sites. Ground herb species richness appear higher at Andulau than Bukit Sawat (37 vs. 29), but this difference was not statistically significant at the subplot level. However, ground herb abundance and density were significantly higher at Bukit Sawat than Andulau (n = 846 vs. 385; 4230 vs. 1925 individuals ha -1 ). The more open canopy at Bukit Sawat may provide higher light availability here than at Andulau, which is characterised by a closed canopy. We suggest that light availability is the most important environmental factor influencing ground herb density and abundance at these sites. Keywords: Borneo, tropical forests, species richness, Zingiberaceae, light availability. ABSTRAK ZAINI, N. H. & SUKRI, R. S. 2014. Keanekaragaman dan kelimpahan tumbuhan herba di lantai hutan dipterokarpa dataran rendah dan hutan kerangas di Brunei Darussalam. Reinwardtia 14(1): 73 – 78. ― Tumbuhan herba penting sebagai penyusun komponen dari keseluruhan kelimpahan jenis hutan tropis. Keanekaragaman tumbuhan herba di lantai hutan dipterokarpa dataran rendah (Andulau) dan hutan kerangas (Bukit Sawat) di Brunei Darussalam, Borneo telah dipelajari. Pada tiap lokasi, semua tumbuhan herba yang terdapat pada 20 subplot berukuran 10 × 10 m pada plot permanen 1 ha didata serta diidentifikasi. Hasil studi menunjukkan terdapat 20 suku dan 32 marga tumbuhan herba, tercatat Zingiberaceae sebagai suku paling melimpah. Tiga belas marga hanya terdapat di Andulau dan tujuh marga hanya terdapat di Bukit Sawat, dengan dua belas marga terdapat di kedua lokasi. Kelimpahan jenis tumbuhan herba lebih tinggi di Andulau daripada di Bukit Sawat (37 vs. 29), tetapi perbedaan tersebut tidak nyata pada tingkat subplot. Perbedaan nyata terdapat pada kelimpahan jenis serta kerapatan tumbuhan herba di Bukit Sawat yang lebih tinggi dari- pada Andulau (n = 846 vs. 385; 4230 vs. 1925 jenis ha -1 ). Makin terbukanya kanopi di Bukit Sawat menyebabkan ketersediaan cahaya lebih tinggi daripada di Andulau. Dari hasil studi diketahui bahwa ketersediaan cahaya adalah faktor lingkungan yang paling penting yang mempengaruhi kerapatan dan kelimpahan jenis tumbuhan herba. Kata kunci: Borneo, hutan tropis, kekayaan jenis, Zingiberaceae, ketersediaan cahaya. INTRODUCTION There is an increasing realization that herb diversity contributes significantly to total plant species diversity in a tropical forest (Gentry & Dodson, 1987; Costa, 2004). For example, the understorey of Neotropical forests are typically species rich, with herbaceous plants accounting for 21 to 47% of total plant species (Croat, 1978; Gentry & Dodson, 1987; Costa, 2004). Herbaceous plants are known to represent 8 to 29% of total plant species richness in moist to wet forests, 53% in dry forests and up to 6% in forests on white sandy soils (Hall & Swaine, 1976; REINWARDTIA 74 [VOL.14 Whitmore et al., 1984; Gentry & Dodson, 1987; Gentry & Emmons, 1987). Despite this, studies of herb diversity in aseasonal Southeast Asian tropical rain forests remain few in comparison to studies on tree diversity. We studied ground herbs at two contrasting lowland forests in Brunei Darussalam. Throughout our work, we have adopted the ground herb definition by Poulsen & Balslev (1991) in which ground herbs are defined as herbaceous plants that are rooted on the forest floor. Although this definition typically includes those of facultative terrestrial species such as juvenile and fallen epiphytes, and climbers, we have chosen to focus on ground herbs which are completely rooted on the forest floor, hence excluding epiphytes and climbers. However, we included as ground herbs, climbers that were recorded at ground level. Our aim was to compare ground herb diversity between a lowland mixed dipterocarp forest (MDF) and a heath forest (HF) in Brunei Darussalam. Specifically, we asked the question: Is there a difference in the diversity, density and abundance of ground herbs between these two forest types? METHOD Study sites The study sites were located within a lowland MDF at the Andulau Forest Reserve, located about 4 km southwest of Sungai Liang (4 o 39’ 26”N, 114 o 30’ 57”E) and a HF at the Bukit Sawat Forest Reserve, located about 11 km south of Sungai Liang (4 o 34’ 37”N, 114 o 30’ 11”E; see N. H. Zaini, 2013). Field work was conducted within two 0.96 ha permanent forest plots belonging to Universiti Brunei Darussalam (Davies & Becker, 1996) in the Belait District. The two sites differ in their topography, with a mainly flat terrain at Bukit Sawat and a more gently undulating topography at Andulau (Davies & Becker, 1996). Within each 0.96 ha plot, twenty 10 × 10 m subplots were randomly selected for census of ground herbs, amounting to a total sampling area of 0.2 ha at each study site. The Andulau subplots has an elevational range of 54 to 89 m above sea level (asl) while those at Bukit Sawat were at 25 to 60 m asl. Census of ground herbs All ground herbs within the 20 selected subplots at each study sites were tagged and their coordinates recorded. Voucher specimens of censused ground herbs at both sites were collected and identified at the Brunei National Herbarium (BRUN). In addition, several specimens were identified at the Sandakan Herbarium (SAN) of the Sabah Forest Research Centre. Where possible, specimens were identified to species level, or otherwise grouped to morphospecies. Photographic records were also taken for each of the ground herb censused. Statistical analysis The diversity of ground herbs between Andulau and Bukit Sawat was determined using the Inverse Simpson’s Index (Ds). The Inverse Simpson’s Index was used as it takes into account the number of species present and the abundance of each species (Magurran, 2004), with a larger Ds value indicating higher diversity. We calculated species richness as the number of species recorded in each subplot, abundance as the total number of ground herb individuals per subplot, and density as the number of individuals per hectare. Differences in diversity, species richness, abundance and density between the two sites were calculated using Student’s t-test. All statistical analyses were conducted using R 2.15.2 (R Development Core Team, 2012). RESULTS Differences in species richness, species diversity, density and abundance of ground herbs A total of 20 families were recorded from both the Andulau and Bukit Sawat sites. Fifteen families were recorded in Andulau and 13 families at Bukit Sawat (Table 1). The total number of genera recorded were higher in Andulau (n = 25) than at Bukit Sawat (n = 19). Similarly, total species richness of ground herbs was higher at Andulau (n = 37) than at Bukit Sawat (n = 29). However, this apparent between-site difference in species richness was not significant at the subplot level (t = − 0.166, p = 0.869). Despite the higher number of genera and species recorded at Andulau than Bukit Sawat, ground herb abundance was significantly higher at Bukit Sawat subplots than the Andulau subplots (n = 846 vs. 385; p < 0.006). The density of ground herbs (number individuals per ha) were significantly lower in Andulau (1925 individuals ha -1 ) than at Bukit Sawat (4245 individuals ha -1 ; p < 0.006). The most abundant family at both sites was Zingiberaceae which recorded a total of 119 and 298 individuals at Andulau and Bukit Sawat respectively (Table 2). Other abundant families 2014] 75 ZAINI & SUKRI: The diversity and abundance of ground herbs in Brunei Darussalam include Araceae (Andulau = 67; Bukit Sawat = 169), Orchidaceae (Andulau = 28; Bukit Sawat = 121) and Pandanaceae (Andulau = 65; Bukit Sawat = 82). For these four abundant families, as well as for Lindsaeaceae, Myrsinaceae and Woodsiaceae, Bukit Sawat consistently showed higher abundance of individuals than Andulau. In contrast, the family Vitaceae showed a higher abundance at Andulau (n = 67) compared to Bukit Sawat (n = 14). We recorded a total of 32 genera at both sites, with the highest number of genera shown by Araceae (n = 5), Zingiberaceae (n = 4) and Orchidaceae (n = 3; Table 2). The most abundant genus at Andulau was Pandanus (Family Pandanaceae; n = 62) followed by Pterisanthes (Family Vitaceae; n = 56), and Scindapsus (Family Araceae; 49 individuals; see Table 2). Three genera at Andulau were represented by a single individual each: Amydrium (Family Araceae), Huperzia (Family Lycopodiaceae) and Selaginella (Family Selaginellaceae). The most abundant genus at Bukit Sawat was Boesenbergia (Family Zingiberaceae; n = 289) followed by Scindapsus (Family Araceae; n = 162) and Pandanus (Family Pandanaceae; n = 64). Two genera at Bukit Sawat were represented by a single individual each: Dischidia (Family Apocynaceae) and Curculigo (Family Hypoxidaceae). A total of thirteen genera were found only at Andulau, seven only at Bukit Sawat and twelve were present at both sites (Fig. 1). Families that were recorded at both sites include Araceae, Lindsaeaceae, Myrsinaceae, Orchidaceae, Pandanaceae, Vitaceae, Woodsiaceae and Zingiberaceae. Seven families were exclusive to Andulau (Araliaceae, Blechnaceae, Cyatheaceae, Lycopodiaceae, Melastomataceae, Selaginellaceae and Tectariaceae) while five families were only found at Bukit Sawat (Apocynaceae, Hypoxidaceae, Nepenthaceae, Rubiaceae and Schizaeceae). DISCUSSION Despite a lack of significant difference in ground herb species richness and diversity at the subplot level between Andulau and Bukit Sawat, there was a significant difference in ground herb abundance and density, both of which were higher at the HF subplots in Bukit Sawat than in the lowland MDF subplots at Andulau. We suggest that the non-significant differences in species richness and diversity may be partly due to the small sampling area of 0.2 ha at each forest site. Small sample sizes can underestimate species diversity estimations and affect species distribution model predictions (Wisz et al., 2008). Additionally, some ground herbs censused in this study were identified only to morphospecies, and so the total number of species at each site presented here may be an underestimate of the actual species richness. The high abundance of Zingiberaceae at both Andulau and Bukit Sawat is consistent with findings of Poulsen (1996) at a 1-ha lowland MDF plot at Kuala Belalong, which also recorded Zingiberaceae as the most abundant family there. The Brunei checklist records 13 genera of Zingiberaceae (Coode et al., 1996), while a survey of the Heath forests at Nabawan, Sabah have recorded 10 of the Bornean Zingiberaceae genera (Nabawan Project, 1996). Globally, the highest diversity of Zingiberaceae is in Southeast Asia, Table 1. Ground herbs abundance, density and diversity (Inverse Simpson’s Index) for lowland Mixed Dipterocarp Forest at Andulau and Heath forest at Bukit Sawat in Belait District. At each site, a total of twenty 10 × 10 m subplots were randomly selected and sampled for all ground herbs. All values are means (with standard error) with the exception of total area sampled and total number of family which are displayed as the total number. Andulau Bukit Sawat Total area sampled (ha) 0.2 0.2 Total number of family 15 13 Total number of genera 5.9 ± 0.4 5.8 ± 0.4 NS Species richness (total number of species) 6.4 ± 0.4 6.5 ± 0.4 NS Abundance (total number of individuals) 19.3 ± 2.5 42.5 ± 7.1** Density (number of individuals ha -1 ) 1925 ± 251.0 4245 ± 707.4** Inverse Simpson’s Index 1.60 ± 0.18 1.45 ± 0.10 NS ** significant at p < 0.05; NS = Not Significant at p > 0.05 REINWARDTIA 76 [VOL.14 with Borneo alone recording 19 genera, 4 of which are endemic to Borneo (Lamb et al., 2013). The species richness of Zingiberaceae was higher in Andulau than at Bukit Sawat, however Zingiberaceae abundance was higher at Bukit Sawat. This was similarly recorded by Gobilik (2008) in upland heath forest in Serudong, Southern Sabah, where the diversity of Zingiberaceae was lower. Additionally, higher Zingiberaceae density and abundance were linked with environmental variables of light and precipitation as open, wet and humid conditions provide better environment for growth of Zingiberaceae (Poulsen, 2006). Canopy openness appear to be greater at Bukit Sawat than Andulau. This may potentially explain why there was a higher abundance of Zingiberaceae at Bukit Sawat, with Boesenbergia alone comprising 289 individuals. In contrast, Andulau has a lower total number of individuals (n = 119) for Zingiberaceae family. Differences in light availability may result from differences in the canopy structure (Rich et al., 1993), and the two forest sites in the present study have been shown to exhibit significant differences in canopy structure (Hassan, 2012). Higher photosynthetically active radiation (PAR) was also recorded in the Bukit Sawat plots than at Andulau (Zaini, 2013). This in turn may affect the reflection and transmission of light to the forest floor, thereby influencing the growth of ground herbs under the canopy (Poulsen and Pendry, 1995). Differences in light intensity can also affect seed germination under the closed canopy environment (Smith, 1987). Additionally, the density and abundance of many ground herbs could be influenced by forest gaps, as their reproduction and growth may depend on these gaps (Smith, 1987). CONCLUSION Ground herbs diversity was not significantly different between the lowland Mixed Dipterocarp forest at Andulau and the Heath forest at Bukit Sawat, although their density and abundance were significantly higher at Bukit Sawat than Andulau. Light variablility may potentially be an influential factor for any differences in the diversity, density and abundance of ground herbs between the two forest types in this study. However, an increased sampling of ground herbs coupled with a quantitative measurement of the light environment is needed to elucidate these effects. Fig. 1. Venn-diagram to illustrate the distirbution of ground herbs, represented by genera, recorded at Andulau and Bukit Sawat in the Belait District. The codes for each genus and their definitions are listed in Table 2. 2014] 77 ZAINI & SUKRI: The diversity and abundance of ground herbs in Brunei Darussalam Table 2. Population attributes of ground herbs in twenty 10 × 10 m subplots located in lowland Mixed Dipterocarp Forest and Heath Forest at Andulau and Bukit Sawat respectively. Families are arranged in alphabetical order. No. Family Genus Site Presence Abundance Genus Code Andulau Sawat 1 Apocynaceae Dischidia Sawat 0 1 DISCH 2 Araceae Alocasia Both 8 7 ALO Amydrium Andulau 1 0 AMY Anadendrum Andulau 7 0 ANA Homalomena Andulau 2 0 HOMA Scindapsus Both 49 162 SCIN 3 Araliaceae Schefflera Andulau 2 0 SCHF 4 Blechnaceae Blechnum Andulau 11 0 BLECH 5 Cyatheaceae Cyathea Andulau 2 0 CYA 6 Hypoxidaceae Curculigo Sawat 0 2 CUR 7 Lindsaeaceae Asplenium Andulau 2 0 ASP Lindsaea Sawat 0 33 LIND 8 Lycopodiaceae Huperzia Andulau 1 0 HUPER 9 Melastomataceae Ochthocharis Andulau 4 0 OCHT 10 Myrsinaceae Labisia Both 2 7 LAB 11 Nepenthaceae Nepenthes Sawat 0 11 NEP 12 Orchidaceae Bromheadia Both 19 59 BROM Claderia Both 9 59 CLAD Malaxis Sawat 0 3 MAX 13 Pandanaceae Freycinetia Both 3 18 FREY Pandanus Both 62 64 PAND 14 Selaginellaceae Selaginella Andulau 1 0 SELA 15 Rubiaceae Psychotria Sawat 0 55 PSYCH 16 Schizaeceae Schizaea Sawat 0 39 SCHI 17 Tectariaceae Tectaria Andulau 10 0 TECT 18 Vitaceae Ampelocissus Both 11 11 AMP Pterisanthes Both 56 3 PTE 19 Woodsiaceae Diplazium Both 4 14 DIP 20 Zingiberaceae Alpinia Andulau 24 0 ALP Boesenbergia Both 16 289 BOESEN Globba Andulau 42 0 GLOB Plagiostachys Both 37 9 PLAG ACKNOWLEDGEMENTS We would like to thank the Brunei Forestry Department, Ministry of Industry and Primary Resources (MIPR) for permission to conduct research at the Andulau and Bukit Sawat Forest Reserves, and the Biodiversity Research and Innovation Centre, MIPR for permission to export specimens to SAN Herbarium. We are grateful to staff of BRUN Herbarium (Awg. Joffre Haji Ali Ahmad, Awg. Ariffin Kalat, Awg. Watu Awok and Awg. Azlan Pandai) and SAN Herbarium (Dr. Joan Pereira, Mr. John Sugau and Mr. Jemson) for their invaluable assistance in the identification of our voucher specimens. We also thank Dr Faizah Hj Metali, and technical staff of the Environmental and Life Sciences Programme for assistance with laboratory work. REFERENCES COODE, M. J. E., DRANSFIELD, J., FORMAN, L. L., KIRKUP, D. W. & SAID, I. M. 1996. A checklist of the flowering plants and gymnosperms of Brunei Darussalam. Ministry of Industry and Primary Resources, Brunei. COSTA, F. R. C. 2004. Structure and composition of the ground-herb community in a terra-firme Central Amazonian forest. Acta Amz. 34: 53–59. CROAT, T. B. 1978. Flora of Barro Colorado Island. Stanford University Press, Stanford. DAVIES, S. J. & BECKER, P. 1996. 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Blackwell Science Ltd, Blackwell Publishing, UK. NABAWAN Project. 1996. Sabah Biodiversity Conservation Project – Identification of Potential Protected Areas. Ministry of Culture, Environment and Tourism. POULSEN, A. D. & BALSLEV, H. 1991. Abundance and cover of ground herbs in an Amazonian rain forest. Journal of Vegetation Science. 2: 315–322. POULSEN, A. D. & PENDRY, C. A. 1995. Inventories of ground herbs at three altitudes on Bukit Belalong, Brunei, Borneo. Biodiversity and Conservation. 4: 745–757. POULSEN, A. D. 1996. Species richness and density of ground herbs within a plot of lowland rainforest in North-West Borneo. Journal of Tropical Ecology. 12: 177–190. POULSEN, A. D. 2006. Etlingera of Borneo. Natural History Publications, Kota Kinabalu, Borneo. R CORE TEAM. 2012. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL http:// www.R-project.org. RICH, P. M., CLARK, D. B., CLARK, D. A. & OBEBAUER, S.F., 1993. 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Bibliography, list of literature cited or references follow the Harvard system as the following examples. Journal : KRAENZLIN, F. 1913. Cyrtandraceae novae Philippinenses I. Philipp. J. Sci. 8: 163-179. MAYER, V., MOLLER, ML, PERRET, M. & WEBER, A. 2003. Phylogenetic position and generic differentiation of Epithemateae (Gesneriaceae) inferred from plastid DNA sequence data. American J. Bot. 90: 321-329. Proceedings :TEMU, S. T. 1995. Peranan tumbuhan dan ternak dalam upacara adat "Djoka Dju" pada suku Lio, Ende, Flores, Nusa Tenggara Timur. In: NASUTION, E. (Ed.). Presiding Seminar dan Lokakarya Nasional Etnobotani II. LIP1 & Perpustakaan Nasional: 263-268. (In Indonesian). SIMBOLON, H. & MIRMANTO, E. 2000. Checklist of plant species in the peat swamp forests of Central Kalimantan, Indonesia. In: IWAKUMA et al. (Eds.) Proceedings of the International Symposium on: Tropical Peatlands. Pp. 179-190. Book : RIDLEY, H. N. 1923. Flora of the Malay Peninsula 2. L. Reeve & Co. Ltd, London. Part of Book : BENTHAM, G. 1876. Gesneriaceae. In: BENTHAM, G. & HOOKER, J. D. Genera plantarum 2. Lovell Reeve & Co., London. Pp. 990-1025. Thesis : BAIRD, L. 2002. A Grammar of Keo: An Austronesian language of East Nusantara. Australian National University, Canberra. [PhD. Thesis]. Website : http://www.nationaalherbarium.n1/fmcollectors/k/Kostermans AJGH.htm). Accessed 15 February 2012. Reinwardtia Published by Herbarium Bogoriense, Botany Division, Research Center for Biology, Indonesian Institute of Sciences Address: Jin. Raya Jakarta-Bogor Km. 46 Cibinong 16911, P.O. Box 25 Cibinong Telp. (+ 62) 21 8765066; Fax (+62) 21 8765062 E-mail: reinwardtia@mail.lipi.go.id REINWARDTIA Author Agreement Form Title of article Name of Author(s) : I/We hereby declare that: • My/Our manuscript was based on my/our original work. • It was not published or submitted to other journal for publication. • I/we agree to publish my/our manuscript and the copyright of this article is owned by Reinwardtia. • We have obtained written permission from copyright owners for any excerpts from copyrighted works that are included and have credited the sources in our article. Author signature (s) Date Name MUHAMMAD EFFENDI, TATIK CHIKMAWATI & DEDY DARNAEDI. New cytotypes of Pteris ensiformis var. victoria from Indonesia 133 SUZANA SABRAN, REUBEN NILUS, JOAN T. PEREIRA & JOHN BAPTIST SUGAU. Contribution of the heart of Borneo (HoB) initiative towards botanical exploration in Sabah, Malaysia 137 WENNI SETYO LESTARI, BAYU ADJIE, TASSANAI JARUWATANAPHAN, YASUYUKI WATANO & MADE PHAR- MAWATI. Molecular phylogeny of maidenhair fern genus Adiantum (Pteridaceae) from Lesser Sunda Islands, Indonesia based on Rbcl and Trnl-f 143 ELIZABETH A. WIDJAJA & DANIEL POTTER. Floristic study of Mekongga Protected Forest: towards establishment of the Mekongga National Park 157 YESSI SANTIKA, EKA FATMAWATI TIHURUA & TEGUH TRIONO. Comparative leaves anatomy of Pandanus, Freycinetia and Sararanga (Pandanaceae) and their diagnostic value 163 SUHARDJONO PRAWIROATMODJO & KUSWATA KARTAWINATA. Floristic diversity and structural characteristics of mangrove forest of Raj a Ampat, West Papua, Indonesia 171 IAN M. TURNER. A new combination in Orophea (Annonaceae) for Uvaria nitida Roxb. ex G. Don 181 IVAN S AVINOV. Taxonomic revision of Asian genus Glyptopetalum Thwaites (Celastraceae R. Br.) 183 YUSI ROSALINA, NISYAWATL ERWIN NURDIN, JATNA SUPRIATNA & KUSWATA KARTAWINATA. Floristic compo- sition and structure of a peat swamp forest in the conservation area of the PT National Sago Prima, Selat Panjang, Riau, Indone- sia 193 IMAN HID AY AT & JAMJAN MEEBOON. Cercospora brunfelsiicola (Fungi, Mycosphaerellaceae), a new tropical Cercosporoid fungus on Brunfelsia uniflora 211 MAX VAN BALGOOY & ELIZABETH A. WIDJAJA. Flora of Bali: a provisional checklist 219 EKA FATMAWATI TIHURUA & INA ERLINAWATI. Leaf anatomy of Pandanus spp. (Pandanceae) from Sebangau and Bukit Baka-Bukit Raya National Park, Kalimantan, Indonesia 223 JULIA SANG & RUTH KIEW. Diversity of Begonia (Begoniaceae) in Borneo - How many species are there? 23 3 DIAN LATIFAH, ROBERT A. CONGDON & JOSEPH A. HOLTUM. A Physiological approach to conservation of four palm species: Arenga australasica, Calamus australis, Hydriastele wendlandiana saALicuala ramsayi 237 REINWARDTIA Vol. 14. No. 1.2014 CONTENTS Page ABDULROKHMAN KARTONEGORO & DANIEL POTTER. The Gesneriaceae of Sulawesi VI: the species from Mekongga Mts. with a new species of Cyrtandra described 1 LIM CHUNG LU & RUTH KIEW. Codonoboea (Gesneriaceae) sections in Peninsular Malaysia 13 WISNU H. ARDI, YAYAN W. C. KUSUMA, CARL E. LEWIS, ROSNIATI A. RISNA, HARRY WIRIADINATA, MELISSA E. ABDO & DANIEL C. THOMAS. Studies on Begonia (Begoniaceae) of the Molucca Islands I: Two new species from Halmahera, Indonesia, and an updated description of Begonia holosericea 19 YUZAMMI, JOKO R. WITONO & WILBERT L. A. HETTERSCHEID. Conservation status of Amorphophallus discophorus Backer & Alderw. (Araceae) in Java, Indonesia 27 MOHAMMAD F. ROYYANI & JOENI S. RAHAJOE. Behind the sacred tree: local people and their natural resources sustainabil- ity 35 FIFI GUS DWIYANTI, KOICHI KAMIYA & KO HARADA. Phylogeographic structure of the commercially important tropical tree species, Dryobalanops aromatica Gaertn. F. (Dipterocarpaceae) revealed by microsatellite markers 43 SACHIKO NISHIDA & HENK VAN DER WERFF. Do cuticle characters support the recognition of Alseodaphne, Nothaphoebe and Dehaasia as distinct genera? 53 NURUL AMAL LATIFF, RAHAYU SUKMARIA SUKRI & FAIZAH METALI. Nepenthes diversity and abundance in five habi- tats in Brunei Damssalam 67 NURUL HAZLINA ZATNI & RAHAYU SUKMARIA SUKRI. The diversity and abundance of ground herbs in lowland mixed Dipterocarp forest and heath forest in Brunei Darussalam 73 MUHAMMAD AMIRUL AIMAN AHMAD JUHARI, NORATNI TALIP, CHE NURUL ATNI CHE AMRI & MOHAMAD RUZI ABDUL RAHMAN. Trichomes morphology of petals in some species of Acanthaceae 79 DIAN ROSLEINE, EIZI SUZUKI, ATIH SUNDAWIATI, WARDI SEPTIANA & DESY EKAWATI. The effect of land use history on natural forest rehabilitation at corridor area of Gunung Halimun Salak National Park, West Java, Indonesia 85 JULIUS KULIP. The Ethnobotany of the Dusun people in Tikolod village, Tambunan district, Sabah, Malaysia 101 PETER O'BYRNE. On the evolution of Dipodium R. Br 123 Reinwardtia is a LIPI accredited Journal (517/AU2/P2MI-LIPI/04/2013) Herbarium Bogoriense Botany Division Research Center for Biology - Indonesian Institute of Sciences Cibinong Science Center Jln. Raya Jakarta - Bogor, Km 46 Cibinong 16911, P.O. Box 25 Cibinong Indonesia barudepan 397-573-1-SM belakangbaru img577_Page_1 img577_Page_2 img577_Page_3 img577_Page_4