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Thai Forest Bulletin (Botany) No THAI FOREST BULLETIN (BOTANY) NO. 31 ISSN 0495–3843 THE FOREST HERBARIUM NATIONAL PARK, WILDLIFE AND PLANT CONSERVATION DEPARTMENT BANGKOK, THAILAND DECEMBER 2003 CONTENTS Ceropegia hirsuta (Asclepiadaceae), a new record for Thailand………………….. Tanucha Boonjaras & Obchan Thaithong 1 Notes on two Ixora species, new records for Thailand Voradol Chamchumroon 7 The Rubiaceae of Ko Chang, south-eastern Thailand………...…………………. Voradol Chamchumroon & Christian Puff 13 Two new species of Neohouzeoua (Gramineae-Bambusoideae) from Thailand and Myanmar………………………………………………………………. Soejatmi Dransfield, Rungnapar Pattanavibool & Sarawood Sungkaew 27 A new description of Diospyros coaetanea (Ebenaceae)………………………... Sutee Duangjai & Chamlong Phengklai 34 A new species of Spatholirion (Commelinaceae) from Thailand and further notes on S. ornatum……………..…Kai Larsen & Supee Saksuwan Larsen 39 Notes on Clerodendrum (Lamiaceae)……………………………………………. Charan Leeratiwong & Pranom Chantaranothai 44 Matoniaceae (Pteridophyta) - a new family record for Thailand………………… Stuart Lindsay, Somran Suddee, David J. Middleton & Rachun Pooma 47 An acount of the Plantaginaceae of Thailand………………………John Parnell 53 Thai Rubiaceae with hooks and thorns………………………………………...… Christian Puff & Voradol Chamchumroon 67 Non–indigenous Rubiaceae grown in Thailand…………………………..……… Christian Puff & Voradol Chamchumroon 77 Notes on the genus Alpinia (Zingiberaceae) in Thailand………………………... Surapon Saensouk, Pranom Chantaranothai & Kai Larsen 97 Karyology of Jatropha (Euphorbiaceae) in Thailand……………………………. Puangpaka Soontornchainaksaeng & Thaya Jenjittikul 107 Cytogenetic studies and taxonomic considerations in some taxa of Mallotus (Euphorbiaceae) in Thailand……………………………………………….. 115 Puangpaka Soontornchainaksaeng, Pranom Chantaranothai & Chadapron Senakun Capparis sikkimensis Kurz subsp. yunnanensis (Capparaceae), a new record for Thailand. Prachaya Srisanga, Chusie Trisonthi & Kongkanda Chayamarit 125 Radermachera eberhardtii (Bignoniaceae), a new record for Thailand…………. Prachaya Srisanga, Chusie Trisonthi & Thawatchai Santisuk 131 Rhodoleia (Hamamelidaceae), a new generic record for Thailand………...……. Somran Suddee & David J. Middleton 134 A preliminary study of Gonystylaceae in Thailand…………………………….... Chawalit Niyomdham & Metinee Tarumatsawat 136 The Genus Porandra (Commelinaceae) in Thailand ……………………………. Thaweesak Thitimetharoch, Pranom Chantaranothai, & Robert B. Faden 143 Printed at: PRACHACHON CO., LTD. 35 Soi Pipat, Silom Road, Bangrak, Bangkok 10500, Thailand. Tel. 66-2636-6550-8 THAI FOR. BULL. (BOT.) 31: 1–6. 2003. Ceropegia hirsuta (Asclepiadaceae), a new record for Thailand TANUCHA BOONJARAS *& OBCHANT THAITHONG ** ABSTRACT. Ceropegia hirsuta, a new record for Thailand, is described and illustrated. There are approximately 170 species of the genus Ceropegia distributed in Southeast Asia, India, Madagascar, Tropical Arabia, the Canary Islands, Africa, New Guinea and Northern Australia. Four species were previously reported in Thailand (Kerr, 1951), namely C. arnottiana Wight, C. jucunda Kerr (= C. lucida Wall.), C. siamensis Kerr (= C. monticola W.W. Sm.) and C. sootepensis Craib. As there are no further reports of this genus in Thailand, the discovery of Ceropegia hirsuta Wight & Arn. at Pha Taem National Park in June 2001 represents a new record. Ceropegia hirsuta Wight & Arn., in Wight, Contrib. 30. 1834; Hook.f., Fl. Brit. India 4: 71. 1883; Gamble, Fl. Pres. Madras 5: 859. 1923; H. Huber, Mem. Soc. Broter. 12: 63. 1957; Stevens in Saldanha & Nicolson, Fl. Hassan Distr.: 444. 1976; Ansari, Fasc. Fl. India 16: 16. 1984. Type: India, Wight Cat. no. 1510 (holotype K). Fig. 1, 2. Herbs or twining herbs; subterranean tuber not seen. Stem ca. 3 mm in diam., pubescent. Leaves opposite, decussate, elliptic to ovate ca. 6.5 by 3 cm, pubescent on both sides, apex acute, base rounded, margin entire, ciliate; petiole ca. 2 cm long, pubescent. Cymes axillary, few-flowered; peduncle up to 1 cm long, pubescent. Flowers large, pedicel ca. 1 cm long, pubescent. Sepals 5, free, linear, 5–6 mm long with gland at base, glabrous inside, pubescent outside. Corolla urceolate, 4–5 cm long, corolla tube ca. 3 cm long, curved, inflated at base, funnel-shaped above, sparsely hairy inside, puberulent outside, creamy yellow with purplish red spots; corolla lobes, broadly ovate, 7–8 by 4–4.5 mm, hairy inside, margin hairy, folded back, forming plate-like hairy keels inside; apex fused, forming an almost globose dome. Corona in 2 rows; outer corona 5, bifid, deltoid, hairy, inner corona 5, linear, erect, tip hooked, sparsely hairy. Pollinaria 5, pollinium ascending 0.4 mm long, yellow with deltoid pellucid tip, corpusculum spathulate, reddish-brown. Ovaries 2, ca. 2 mm long, marginal placentation, ovules numerous, style very short. Fruits and seeds not seen. Thailand.⎯ EASTERN: Ubon Ratchathani [Pha Taem National Park, T. Boonjaras 10 (BCU)]. Distribution.⎯ India. 2 THAI FOREST BULLETIN (BOTANY) 31 ∗Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand. ∗∗Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand. Ecology.⎯ On sandy soil in deciduous dipterocarp forest, 250–300 m alt. Flowering June–August. Vernacular.⎯ Khreua I Thao (เครืออเฒี า) (Ubon Ratchathani). Uses.⎯ The whole plant is used as an analgesic. Note.⎯ Ceropegia hirsuta is distinguished by the hooked tip of the inner corona, and is the only Asian species with this character. ACKNOWLEDGEMENTS This work was supported by National Research Council of Thailand. Thanks are due to Dr Somran Suddee and Dr Chumpol Khunwasi for valuable suggestions. We also thank Mr Sahut Chantana-orrapint for the photographs. REFERENCE Kerr, A.F.G. 1951. Asclepiadaceae. In: Pendleton, R.L. (ed.), Fl. Siam. Enum. 3(1): 1–51. CEROPEGIA HIRSUTA (ASCLEPIADACEAE), A NEW RECORD FOR THAILAND (T. BOONJARAS & O. THAITHONG) 3 1 mm 5 mm 0.1 mm 1 mm Figure 1. Ceropegia1 hirsutacm Wight & Arn. A. habit; B. calyx and ovary; C. flower; D. pollinaria, 1. proximal view, 2. distal view; E. corona. All from T. Boonjaras 10 (BCU). Drawn by T. Boonjaras. 1 mm 4 THAI FOREST BULLETIN (BOTANY) 31 CEROPEGIA HIRSUTA (ASCLEPIADACEAE), A NEW RECORD FOR THAILAND (T. BOONJARAS & O. THAITHONG) 5 A B Figure 2. Ceropegia hirsuta Wight & Arn. A. habit; B. flower. THAI FOR. BULL. (BOT.) 31: 7–12. 2003. Notes on two Ixora species, new records for Thailand VORADOL CHAMCHUMROON* ABTRACT. During a revision of Ixora for the Flora of Thailand, two new records were found for Thailand. Ixora henryi, previously known only from China, is reported from northern Thailand. Ixora cambodiana is recorded from near the border between Thailand and Cambodia. Descriptions and illustrations of the species are provided. Ixora L. comprises ca. 300 species from Africa and Asia (Mabberley, 1987). There are 20 species in Peninsular Malaysia, occurring in both lowland and upland areas (Corner, 1941). Craib (1934) listed ca. 38 species and seven varieties in Florae Siamensis Enumeratio. Boonbundral (1978) carried out a preliminary study of the genus in Thailand, describing 23 species and three varieties. Whilst revising the genus for the Flora of Thailand the following new records have come to light. Ixora cambodiana Pit., Fl. Indo-Chine 3: 320. 1923. Types: Cambodia, without locality, Jullien s.n. (syntype P); Vietnam, Co-phah, between Hanoi and Bac-ninh, Balansa s.n. (syntype P). Figs. 1, 3. Shrub 3 m high; branchlets glabrous. Leaves elliptic, oblong or oblong-obovate; petiole 0.4–0.9 cm long, glabrous; blades elliptic-oblong, base cuneate, apex broadly acuminate, 10.5–12 by 3–3.1 cm, herbaceous, with 6–8 pairs of lateral nerves; midrib prominent underneath. Stipules with sheaths 0.4–0.6 mm long, cuspidate, glabrous outside; awn 0.1–0.2 cm long. Inflorescence erect, lax, corymbiform, articulate, 8–9 cm wide and 6–8 cm long, the inflorescence-supporting leaf pairs with smaller, elliptic blades, (0.7)–1 by 0.2–0.4 cm, peduncle 1–4 cm long; axes, pedicels and calyces densely covered with short spreading hairs; central first order axes 4 cm long, lateral first order axes 5–6 cm long; first order bracts without the stipular parts, the latter rather loose, shortly-hairy. Ultimate flower triads with flowers pedicellate; pedicels 0.1–0.2 cm long, the pedicel of the central flower shorter than the pedicels of the lateral ones; bracteoles present on most pedicels, opposite at the base of the ovary, narrowly triangular to filiform, covered with spreading hairs outside and with colleters inside, 0.5–1.2 by 0.2 cm. Flowers fragrant. Calyx usually densely hairy, the hairs short; tube 0.2–0.4 cm long; lobes triangular with acute tips, 0.5–0.8 cm long. Corolla white or pale pinkish, tube 2.5–3.5 cm long; lobes 0.6–0.8 by 0.2 cm, ovate, obtuse or rounded, glabrous or sparely ciliate at base. Anthers pale orange, opening by means of longitudinal slits. Style exserted, 3 mm long; stigma 0.4–0.5 mm long, pale orange. Ovary 0.1–0.3 cm long. Fruits globose, 1–2 cm in diam. Seeds usually 0.7–0.8 by 0.8–1 cm, in a 1–2-seeded drupe, semi-globose with one face flattened-convex. *The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Chatuchak, Bangkok 10900, Thailand. 8 THAI FOREST BULLETIN (BOTANY) 31 Thailand.— NORTH-EASTERN: Mukdahan [Dong Bang-I, 16 May 1930, Kerr 21489 (AAU, K); EASTERN: Buri Ram [Khao Phanom Dong Rak, 5 May 2002 Chamchumroon 1472 (BKF)]. Distribution.— Thailand, Cambodia, Vietnam. Ecology.— Dry evergreen forest. Phenology.—
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