Microsoft Word - 05. Lloydia nana.doc Bangladesh J. Plant Taxon. 19(1): 33-36, 2012 (June) © 2012 Bangladesh Association of Plant Taxonomists LLOYDIA NANA, A NEW SPECIES OF LILIACEAE FROM CHINA RONG LI1 AND HENG LI Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, P. R. China Keywords: Lloydia nana; Liliaceae; New species; Xizang; China. Abstract Lloydia nana R. Li & H. Li, a new species of Liliaceae from eastern Xizang, China, is described and illustrated. Morphologically, it is closely similar to L. serotina var. parva (C. Marquand & Airy Shaw) H. Hara and L. yunnanensis Franchet, but differs from the former by having single basal leaf, taller stigma than anthers; from the latter by having dwarf habit 2.5-4.0 cm tall, indistinctly 3-lobed stigma, and style slightly longer than ovary. Introduction The genus Lloydia Reichenbach includes 20 species distributed in temperate regions of the North Hemisphere, with one species in western North America and 19 in Eurasia (Wu et al., 2006; Mabberley, 2008). In China, Lloydia Reichenbach is represented by eight species, two of which are endemic, namely, Lloydia oxycarpa Franchet and L. ixiolirioides Baker ex Oliver (Chen and Turland, 2000). In July 2011, during an expedition to the eastern Xizang for the project “Flora of Pan- Himalayas”, we collected some interesting specimens belonging to Lloydia. Among them, we found one species with morphological features that differed from the other known species in this genus. After a critical morphological study, literature survey (Hara, 1971, 1975; Chen, 1987; Liang, 1994; Noltie, 1994; Li, 1997; Chen and Turland, 2000), and examination of many other specimens in the herbarium of Institute of Botany, Chinese Academy of Sciences (PE) and the herbarium of Kunming Institute of Botany, Chinese Academy of Sciences (KUN), we concluded it representing a new species in the genus Lloydia, viz., Lloydia nana R. Li & H. Li. The detailed taxonomic account along with illustration is given below. Lloydia nana R. Li & H. Li, sp. nov. (Fig. 1) Diagnosis: Lloydia serotina var. parva (C. Marquand & Airy Shaw) H. Hara et L. yunnanensis Franchet affinis, sed a priore folio basalio singulo, stigmate celsus quam H. Hara et antherae differt; ab postea habito nano, 2.5-4.0 cm elato, stigmate leviter trilobo, stylo leviter longiore quam ovario differt. Type: China. Xizang Autonymous Region (Tibet): Mangkang County, Quzika township, Hongla Mountains Pass, along the No. 214 national road from Deqing of Yunnan to Mangkang of Tibet, alpine meadow, growing on the slope, 28°22′57.5″N, 98°59′42.1″E, 4225 m, 23 July 2011, Rong Li 554 (holotype: KUN). Perennial herb, 2.5-4.0 cm tall, bulbiferous. Bulb ovoid, 2-5 × 1-3 mm, covered with a membranous, translucent tunic; tunic generally with a collar of persistent leaf bases, apex splitting longitudinally. Stem simple, erect. Basal leaf 1, linear, slightly shorter or longer than stem, 25-40 1Corresponding author. Email: lirong@mail.kib.ac.cn 34 LI AND LI × 0.5-1.0 mm; cauline leaves 3, narrowly linear, 4-8 × c. 0.5 mm. Inflorescence terminal, 1- flowered. Flowers bisexual. Tepals 6, free, glabrous, white with 3 purple veins, basally mottled with yellow, with 2 inconspicuous, nectariferous grooves near base adaxially; outer tepals oblong, c. 5-6 × 1 mm, apex acute; inner tepals obovate, c. 5-6 × 2 mm, apex acute. Stamens 6, inserted at the base of tepals, shorter than tepals, 3-5 mm long; filaments erect, glabrous, 2.5-4.5 mm long; anthers basifixed, oblong, c. 0.5 mm long. Ovary ovoid to sub-ellipsoid, superior, yellow, 2.0-2.5 × 0.5-1.0 mm, 3-loculed; ovules numerous in each locule; style slender, slightly longer than ovary, 2.5-3.0 mm long; stigma indistinctly 3-lobed, longer than anthers. Fig. 1. Lloydia nana R. Li & H. Li, sp. nov. A) habit, B) flower with part petals removed, showing stamens and pistil, C) stamen, D) pistil, E) outer petal (dorsal view), F) inner petal (dorsal view). Phenology: Flowering in July. Etymology: The specific epithet of the new species refers to its dwarf habit. LLOYDIA NANA, A NEW SPECIES OF LILIACEAE 35 Distribution and ecology: Lloydia nana R. Li & H. Li is currently known only from two sites on Quzika township of Mangkang County and Tiantuo township of Zugong County in Changdu Prefecture, Xizang Autonymous Region, China. It grows in alpine meadows at 4,000-4,225 m and shares its habitat with plants such as Spenceria ramalana Trimen, Sanguisorba filiformis (J.D Hook) Handel-Mazzetti, Fragaria sp., Adenophora sp., Hedysarum sp., Pedicularis spp., and Potentilla spp. Conservation status: The species was collected only from two sites and is therefore assumed to be rare. It is considered as ‘Endangered’ using the criteria set out by IUCN (2001) since its known area of occupancy is less than 500 km2 (criterion B2) and the total population size is estimated to be smaller than 2,500 mature individuals (criterion C). The major morphological differences among three taxa of Lloydia are outlined in Table 1. Table 1. Morphological comparison of Lloydia nana sp. nov., L. serotina var. parva and L. yunnanensis. Characters L.nana L. serotina var. parva L. yunnanensis Habit 2.5-4.0 cm tall 3-4 cm tall 8-20 cm tall Basal leaves 1 2 1 or 2 Tepals basally mottled with yellow basally mottled with purple basally mottled with purple or red Style slightly longer than ovary nearly as long as ovary 2-4 times as long as ovary Stigma taller than anthers, indistinctly 3-lobed shorter than anthers, indistinctly 3-lobed equal or taller than anthers, shortly 3-lobed Additional specimens examined (paratypes): China. Xizang Autonymous Region (Tibet): Changdu Prefecture, Zugong County, Tiantuo township, Aixi Mountains Pass, along the No. 318 national road from Zugong to Bangda, alpine meadow, growing on the slope, 29°44′39″N, 97°45′20.7″E, 4000 m, 16July 2009, Zhiling Dao 4239 (KUN); Changdu Prefecture, Mangkang County, Quzika township, Hongla Mountains Pass, along the No. 214 national road from Deqing of Yunnan to Mangkang of Tibet, alpine meadow, growing on the slope, 28°23′24.1″N, 98°58′4.5″E, 4150 m, 23 July 2011, Rong Li 569 (KUN). Acknowledgements The authors are thankful to Miss Rongmei Zhang from Kunming Institute of Botany, Chinese Academy of Sciences (KUN) for drawing the illustration. The study was supported by the open fund of Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences (grant no. KLBB201204), and the project of the knowledge innovation engineering of the Chinese Academy of Sciences (grant no. KSCX2-EW-J-24). 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(ed.), Vascular plants of the Hengduan mountains. Vol. 2. Science Press, Beijing, China, pp. 2432-2434. Mabberley, D.J. 2008. Mabberley’s plant-book: a portable dictionary of plants, their classification and uses. Cambridge University Press, Cambridge, UK. Noltie, H.J. 1994. Lloydia Salisbury ex Reichenbach. In: Noltie, H.J. (ed.), Flora of Bhutan, Vol. 3, Part 1. Royal Botanic Garden Edinburgh, Edinburgh, UK, pp. 108-111. Wu, Z.Y., Zhou, Z.K., Sun, H., Li, D.Z., Peng, H. 2006. The areal-types of seed plants and their origin and differentiation. Yunnan Science and Technology Press, Kunming, China. (Manuscript received on 18 March, 2012; revised on 27 May, 2012)