Publication Type: | Journal Article |
Year of Publication: | 2008 |
Authors: | Bogner, J., NGUYEN V. A. N. D. U. |
Journal: | Willdenowia. Mitteilungen aus dem Botanischen Garten und Museum Berlin-Dahlem. Berlin-Dahlem |
Volume: | 38 |
Start Page: | 527 |
Pagination: | 531 |
ISSN: | 0511-9618 |
Keywords: | aroids, chromosome number, Homalomena vietnamensis, palynology, taxonomy |
Abstract: | Homalomena vietnamensis from Vietnam is described as a species new to science and illustrated. It belongs to H. sect. Homalomena and differs from other species mainly by having leaf blades with a truncate to obtuse base, a non-constricted, rather thick spathe and a slender, subcylindric staminode in each female flower. A chromosome number of 2n = 38 was counted in root tip mitoses. |
URL: | http://dx.doi.org/10.3372/wi.38.38212 |
DOI: | 10.3372/wi.38.38212 |
Full Text | During an expedition carried out by Josef Bogner, Peter Boyce, Mary Sizemore and Van Du Nguyen in 1997 a sterile Homalomena species was collected in the Bach Ma National Park in central Vietnam. Living plants brought back to Germany flowered later in cultivation in the Botanic Garden Munich regularly but the plants were indeterminable with the existing Floras (Hô 2000; Gagnepain 1942; Li 1979) and the last monographic study of the genus (Engler 1912). When in the years 2004 and 2007 the second author studied aroids from Vietnam in the Paris Herbarium (P), he found four collections of this new species made by E. Poilane already in 1939 and he provisionally annotated them as “Homalomena ovatifolia” on the sheets. Poilane’s specimens were collected in the Thua Thien-Hue, Quang Nam and Khanh Hoa provinces of Vietnam. These specimens, however, are not mentioned by Gagnepain (1942). The species with the character combination of broadly ovate leaf blades with a truncate base, a rather thick and non-constricted spathe and the staminode of each female flower being slender and more or less subcylindric is different from all species known from Vietnam and from the neighbouring countries China, Laos, Cambodia or Thailand. Therefore it is described as new to science in the present contribution. |
A new Homalomena species (Araceae) from Vietnam
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