R E I N W A R D T I A [VOL. 7 R E I N W A R D T I A Published by Herbarium Bogoriense, Bogor, Indonesia Volume 7, Part 3, p.p. 283—286 (I960 PUBISTYLUS THOTH. — AN INTERESTING NEW GENUS OF RUBIACEAE FROM ANDAMAN ISLANDS K. THOTHATHRI *) I N T R O D U C T I O N . The tribe Alberteae of Rubiaceae consists of genera like Cremaspora Benth., Polysphaeria Hook, f., Belonophora Hook, f., Aulacocalyx Hook, f., Rhabdostigma Hook, f., Alberta E. Mey., Nematostylis Hook f. and Octotropis Bedd. All the above mentioned genera are natives of Africa and Mada- gascar except Octotropis Bedd. which is a monotypic Indian genus, described from Travancore Hills. A new genus, Pubistylus Thoth. from the Andaman Islands is now added to this tribe. It is interesting to point out t h a t there is no representative genus of this tribe in Malaysia whose flora has greatly influenced the Andaman and Nicobar Islands. P U B I S T Y L U S T h o t h . , g e n . n o v . Pertinet ad Alberteas e familia Rubiacearum, affinisque est Octotropi Bedd.., a qua tamen differt cymis axillaribus paniculatis, calycis tubo tenuiter lobato, stylo clavato, ovario biloculari. Affinis quoque Cremasporae Benth., a qua differt inflores- centia sat laxa, corollae lobis intus villosis. Frutex glaber, ramis pendulis. Folia petiolata, opposita, integra, stipulata. Inflorescentia paniculatim, cymosa, axillaris et terminalis; bracteae et bracteolue parvae. Calycis tubus turbinatus, indistincte lobatus. Corolla campanulata,, 5-loba, lobis ad sinistram^ contortis, extus glabris, intus villosis. Stamina 5, petalis alternu, filamentis brevibus, antheris lineari-oblongis, bilocularibus, dehiscentibus per scissuram longitudinalem. Ovarium biloculare, ovule unico in singulis loculis, pendulo; stylo clavato, pubescenti; stigmate bifido. Frwstus ignotus. Species typica sequens. PUBISTYLUS ANDAMANENSIS Thoth., spec. nov. — Fig. Frutex 2—2.5 m altus, ra/mis pendulis glabris, trunco quadrangulari. Folia siin- plicia, opposita, elliptico-lanceolata, 7.5—10 X 2—3.2 cm, membranacea, integra, ad apicem caudato-acuminata, ad basin cuneata, glabra; nervis lateralibus 6—8 jugis, ascendentibus atque prope marginem unitis; petiolis 5—9 mm longis; stipulis inter- petiolaribus, late ovatis, acutis. Inflorescentia paniculatim cymosa, axillaris et rarius terminalis, 3.5—5 cm longa. Flores albi 3.5—5.5 mm longi, pedicellis gracilibus, U—8 mm longis; bracteis parvis, ovatis, ciliatis; bracteolis sub ipso medio pedicelli. Calycis ") Central National Herbarium, P.O. Botanic Garden, Howrah, India. — 283 — Fig. 14. — Aglaia chartacea Kosterm. — Holotypus (BO).*. 284 R E I N W A R D T I A [VOL. 7 lubus turbinatus, 1.5—2 mm longus, indistincte lobatus, lobis minutis ciliatis. Corolla campanulata, 3—3.5 mm longa, 5-loba, lobis ovatis ad sinisiram contortis, extus ylabrii, intus villosis. Stamina 5, epipetala, petalis alterna,, filamentis brevibus, anthens lincari-oblongisy 1-—l.U mm, longis, bilocularibus, paulum infra divergcntibus, dehiscentibus per scissuram longitudinalern; connectivis supra antherarum thccas productis in appendicevi brevem conicam. Ovarium biloculare, ovulo unico in singidis loculis, pendulo; ovarii disco bene definito, annidari; stylo clavato 2—2.5 mm longo, pubescenti; stigmate bifido. Fructus ignotus. In insula Interview Island, in Andaman septentrionali, die 12 febvuavii anni 1!>59 legit Thothathri Holotypum 920U A, et isotypos 9204. B -G, quos omnes posuit in CAL. Pubistylus Thoth., gen. nov. belongs to the tribe Alberteae of Rubiaceae and related to the genus Octotropis Bedd., but differs in having axillary panicled cyme, faintly lobed calyx tube, clavate style and 2-celled ovary. Also related to Cremaspora Benth., but differs in the pedunculate, rather lax inflorescence and corolla lobes being villous within. Glabrous shrubs; branches drooping. Leaves petiolate, opposite, entire, stipulate. Inflorescence a panicled cyme, axillary or terminal. Bracts and bracteoles small. Calyx tube turbinate, faintly lobed. Corolla campanulate, 5-lobed; lobes twisted to the left, glabrous without, villous within. Stamens 5, alternate with petals; filaments short; anthers linear-oblong, 2-celled, dehiscence by longitudinal slit. Ovary 2-celled; ovule one in each cell, pendu- lous ; disc present; style clavate, pubescent; stigma bifid. Fruit not known. Type species the following: Pubistylus andamanensis Toth., spec. nov. A shrub, 2—2.5 m high; branches drooping, glabrous; stem quadrangular. Leaves simple, opposite, elliptic-lanceolate, 7.5—10 X 2—-3.2 cm, membranous, entire, caudate- acuminate at apex, cuneate at base, glabrous; lateral nerves 6—8 pairs, ascending and uniting near the margin; petiole 5—9 mm long; stipule interpetiolar, broadly ovate, acute. Inflorescence a panicled cyme, axillary or rarely terminal, 3.5— 5 cm long. Flowers white, 3.5—5.5 mm long; pedicels slender, 4—8 mm long; bract small, ovate, ciliate; bracteole just below the middle of the pedicel. Calyx tube turbinate, 1.5—2 mm long, faintly lobed; lobes minutely ciliate. Corolla campanulate, 3—3.5 mm long, 5-lobed; lobes ovate, twisted to the left, glabrous without, villous within. Stamens 5, epipetalous, alternate with petals; filaments short; anthers linear-oblong, 1—1.4 mm long, 2-celled, a little divergent below, dehiscence by longitudinal slit; connectives produced above anther cells into a short, conical appendage. Ovary 2-celled; ovule one in each cell, pendulous; disc of the ovary well defined, annular; style clavate, 2—2.5 mm long, pubes- cent; stigma bifid. Fruit not known. 1966] THOTHATHRI: Pubistylus, a new genus of Rubiaceae 285 The type was collected at Interview Island, North Andaman at an alti- tuoVof 12 m, on 12th February, 1959, by K. Thothathri; holotype (Thotha- thri 9204 A) and isotypes (Thothathri 9204 B~G) are deposited in the Central National Herbarium (CAL). ACKNOWLEDGEMENTS The author expresses his grateful thanks to Dr. C. E. B. Bremekamp, Botanical Museum, Utrecht, Netherlands for critically examining this taxon and thereby giving his valuable opinion on the same. He is equally indebted to Dr. H. Santapau, Director, Botanical Survey of India for kindly rendering the latin diagnosis, to Dr. K. Subramanyam and Dr. S. K. Mukerjee for encouragement. Thanks are also due to Sri Debi Prasad Saha for the illustrations. 286 R E I N W A K D T I A [VOL. 7 R E I N W A R D T I A Published by Herbarium Bogoriense, Bogor, Indonesia Volume 7, Part 3, p.p. 287—290 (1966) A NEW SPECIES OF AGAFETES FROM BHUTAN N. P. BALAKRISHNAN and S. CHOWDHURY *) AGAPETES BHUTANICA Balak. & Chowdhury, spec. nov. — Fig. Affinis A. odontdcerae (Wight) Rook. f. et A. variegatae (Roxb.) D. Don ex G. Don; ab utraque differt pedicellis, ccdycibus et corollis glandu- loso-pilosis; ab A. odontocera differt foliis pseudoverticillatis; ab A. vanegata differt corolla breviore. Frutex epiphyticus, caule pseudotuberoso ad basin; rami breves, patentes, teretes, 7—15 mm crassi; cortex fvliginosus, conspicuis ornatus l&ntieellis; rami juniores angulati, indistincti, subobtusati; vetustiores te- retes; cataphylla plura, depressa in ramulis ju/v embus, subulata, lurida, usque ad 1 cm long a, ca 2 trim lata, marginibus crenulatis, glandulosis ciliatis. Folia 5—6 in singulis pseudoverticillis (verticillis 6—10 cm inter se distnntibus), stibsessilia, oblongo-lanceata, 9—20 X 1—4 cm, basi at- tenuata, apice breviter acuminata, coriacea, sparsim pilosa ad paginam superior em, pilosiora ad margimes; margines undulati, subintegri; costa sat robusta, subtus eminens; nervi laterales 20—25-jugi in nervum intra- marginalem distinctum anastomosantes; nervi tertiarii efformantes reti- cula; petiolis 2—4 mm, longi. Inflorescentia subfasciculata, corymbifovmis, e Tamo aphyllo vetustiore orta, 7—-IB-flora; pedurtculus vix nullus vel usque 1 mm longus, ciliis glanduliferis atropurpweis ornatus; bracteae congestae, ca1 mm longae,-linefares>, subulatae, atropurpureae, glanduloso- ciliatae ad margines; pedicelli 14—1.8 cm, longi, surswn sensirn ampliati, dAnse puberuli et glandailoso-setulosi. Calyx lobatus usque ad medium,, extus dense glanduloso-pilosus; lobi 5, triangulari-acuminati, ca 2 X 1.5 mm. Corolla superne subcylindrica, in feme tubuliari-angustata, sursum levissime ampliata (alabastro apicem versus subconico, 5-angulato), 2.6— 2.8 cm longa (lobis inclusis), superne 9—11 mm diam., inferne 6—7 mm diam., cocdnea, transverse purpurev-vittata, extus superne sparsim glandu- loso-ciliata (plus sic in nervis alabastrorum); lobi 5, ca- 8X5 mm, fili- formes revoluti ad apices. Stamina 10; filamenta line-aria ca 2.5 X 1 mm, albo-puberula, flexa intrinsecus supra medium; antherarum thecae gla- brae, ca 4-5 mm longae, lineates, oblongae; connectivum rostratum; Pubistylus wndamuiiensis Thoth. Fig. 1. A branch with flowers; Pig. 2. A flower; Fig. 3. Corolla spread open showing the stamens; Fig. 4. Gynoecium showing the disc and the clavate, pubescent style; Fig. 5. A vertical section of the ovary showing one pendulous ovule in each cell. *) Botanical Survey of India, Eastern Circle, Shillong, India. — 287 — Rein.Vol.7,Part 3, pp. 221-290_Page_32 Rein.Vol.7,Part 3, pp. 221-290_Page_33 Rein.Vol.7,Part 3, pp. 221-290_Page_34