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Arisaema lihengianum, a species previously only known to exist in China, has now been discovered in Vietnam. The plant was collected during an expedition to Na Hang Nature Reserve in Tuyen Quang province. A. lihengianum grows in primary and secondary broad-leaved evergreen forests on steep rocky slopes between 450-1000 meters in elevation. It has rhizomes, leaves, peduncles, spathes, and spadices consistent with previous descriptions of the species. This represents a newly recorded occurrence of A. lihengianum outside of its native range in China and expands knowledge of the genus Arisaema in Vietnam.
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- 1. http://jsrr.net 97 ISSN: 2249-7846 (Online) Science Research Reporter, 5(2):97-99, (Oct. - 2015) © RUT Printer and Publisher Online, Open Access Available at http://jsrr.net ISSN: 2249-2321 (Print); ISSN: 2249-7846 (Online) Research Article Arisaema lihengianum (Araceae): A newly recorded from Vietnam Hoang Thanh Son* , Trinh Ngoc Bon, Nguyen Quang Hung, Pham Van Vinh, Pham Quang Tuyen Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Email: hoangsonfsiv@gmail.com Article Info Abstract Received: 06-07-2015, Revised: 17-09-2015, Accepted: 19-09-2015 Arisaema lihengianum J. Murata & S. K. Wu, a previously known species only in China, is newly recorded from Vietnam. It is found in primary limestone forest in Na Hang Nature Reserve, Tuyen Quang Province, Vietnam. Keywords: Arisaema lihengianum, Araceae, new record, Na Hang INTRODUCTION The genus Arisaema includes about 170 species (Gusman, 2001). They are distributed mainly in Asia and few species there are in East- Northern Africa and Northern America (Mayo, 1997). Before, this genus was recorded with 5 species belonging to 2 sections in Vietnam (Gagnepain, 1942; Ho, 1993). Recent studies (Truong 2013, 2014; Du, 1998, 2000, 2002, 2005; Du and Boyce, 2005) have recorded 20 species of this genus known in Vietnam. All of them belong to 4 sections (Murata, 1984). In the expeditions in Na Hang Nature Reserve (Tuyên Quang province), a species of Arisaema genus was collected. Through morphological analyses, we recognized that the characters of this species completely fit to the species Arisaema lihengianum J. Murata & S. K. Wu. This investigation surprised us because Arisaema lihengianum was an endemic species of China for long time but now it has been found in Northern Vietnam. Arisaema lihengianum J. Murata & S. K. Wu, J. Jap. Bot. 78: 83 (2003) Fig.1. Plants to 50-70 cm tall, monoecious or male. Rhizome creeping horizontally, purplish to brownish outside, red-purple or violet inside, subcylindric, to 14 × ca. 3.5 cm, branching. Cataphylls to 25 cm, some encircling peduncle directly. Leaf 1, expanding simultaneously with inflorescence; petiole purplish brown to violet, mottled with grento 30 cm, lacking pseudostem; leaf blade 3-foliolate; petiolules 3.5-4 cm; leaflets subequal in size, to 20 × 15 cm; central leaflet oblong-elliptic, base rounded-cuneate, apex acuminate and caudate; lateral leaflets oblique. Peduncle 12-22 cm. Spathe tube white or pale green, narrowly funnelform, 5-6 × 8-10 cm when opened; limb proximal half white, distal half dark red-purple, narrowly deltoid to narrowly deltoid- ovate, 15-20 × 5-7 cm, apex acuminate. Spadix bisexual after sex change; female zone 20-30 × ca. 10 mm; female flowers green, bottle-shaped; male zone 10-20 × ca. 8 mm; male flowers basically white; appendix sessile, 15-18 cm, slender, exserted from throat of spathe and pendulous, proximally white, distally dark red-purple, throughout with numerous filiform neuter flowers 3-5cm. Habitat: Primary and secondary board-leaved evergreen sub-mountain forest on very steep rocky of Na Hang Nature Reserve; 450-1000 m alt. Distribution: Vietnam (Tuyen Quang), China (Gangxi and Yunan).
- 2. http://jsrr.net 98 ISSN: 2249-7846 (Online) Hoang Thanh Son et al., Phenology: Flowering, February - March; Fruiting, April – May. Acknowledgements The authors would like to thank the Management Board of Na Hang Nature Reserve for their kind help in locating field surveys. Fig. 1: Arisaema lihengianum- a: Flowering plant with tuber;-b: Bisexual spadix; -c: Filiform; -d: Rhizome; -e: Inflorescence; -f: Leaf blade. REFERENCES Du NV, 2002. Three new records of the genus Arisaema (Araceae) for Flora of Vietnam and their medicinal values, Journal of Mat. Med., 7: 69. Du NV, 2004. One new species of the genus Arisaema C. Mart. (Araceae) for the Flora of Vietnam, Journ. of Biol. 26: 54. Du NV, Boyce PC, 2005. Two New Species of The Genus Arisaema (Araceae: Arisaemateae) from Northern Vietnam, Folia Malaysiana 6: 35. Gagnepain F, 1942. Araees. Flore Générale de l'Indo-Chine 6: 1075.
- 3. http://jsrr.net 99 ISSN: 2249-7846 (Online) Science Research Reporter, 5(2):97-99, (Oct. - 2015) Gusman G, 2001. Arisaema omkoiense (Araceae), a new species described from North Thailand, 3. Syst. Geogr. Pl., Belgium 71: 3. Gusman G, Liliane G, 2003. The genus Arisaema. Publ. House. A.R. Gantner Verlag Mommanditgesellschaft, FL. 9491, Ruggell. Germany. Ho PH, 1993. Araceae. Illustrations for Flora of Vietnam, vol. 3, book. 1: 416. Mayo SJ. et al., 1997. The genera of Araceae, Kew publ., London, Kew. Murata J, 1984. An Attempt at an Infrageneric Classification of the Genus Arisaema (Araceae). Faculty Sci. Univers., Tokyo, sect.3, 13: 431. Truong HL, Dat NQ, Long NV, Hoa VD, Thap KD & Sang VH, 2014. Arisaema chauvanminhii (Araceae) - a new species from Vietnam. – Ann. Bot. Fennici 51: 394-398. Truong LH, Gio T, Du NV & Viet LKH, 2013. Arisaema honbaensis (Araceae) - a new species from Vietnam. – Folia Malaysiana., 14: 45-50. How to Cite this Article: Hoang Thanh Son* , Trinh Ngoc Bon, Nguyen Quang Hung, Pham Van Vinh, Pham Quang Tuyen, 2015. Arisaema lihengianum (Araceae): A newly recorded from Vietnam. Science Research Reporter, 5(2):97-99.