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Issue: Vol. 633 No. 2: 5 Jan. 2024
Type: Article
Published: 2024-01-05
DOI: 10.11646/phytotaxa.633.2.7
Page range: 163-170
Abstract views: 177
PDF downloaded: 7

Two new species of Typhonium (Araceae) with bicolored staminodes from Central Vietnam

Southern Institute of Ecology, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, No. 1D, TL 29 Street, Thanh Loc Ward, District 12, Ho Chi Minh City, Vietnam. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, No. 1D, TL 29 Street, Thanh Loc Ward, District 12, Ho Chi Minh City, Vietnam.
Southern Institute of Ecology, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, No. 1D, TL 29 Street, Thanh Loc Ward, District 12, Ho Chi Minh City, Vietnam.
Southern Institute of Ecology, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, No. 1D, TL 29 Street, Thanh Loc Ward, District 12, Ho Chi Minh City, Vietnam.
Management Board of Cu Lao Cham Marine Protected Area, 3 Nguyen Hue, Hoi An City, Quang Nam Province, Vietnam.
Department of Ecology and Evolutionary Biology, University of Science, Vietnam National University HCMC, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam. Vietnam National University - HCMC, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam.
Cu Lao Cham Island endemic Hai Van Pass Typhonium bicolor Typhonium culaochamense Monocots

Abstract

Typhonium bicolor and T. culaochamense are described as new species endemic to Central Vietnam. They have bicolored staminodes (apex and base of different colors) which are formerly reported for six species, namely T. bachmaense, T. blumei, T. filiforme, T. flagelliforme, T. kbangense and T. ramosum. The first species is characterized by its oblong-elliptic and thick leaflets, yellowish and elliptic flattened anthers with lateral dehiscence, pink 6–7 mm long staminodes with a pale purple verrucose surface and a bright yellow and obtuse or truncate apex, oblanceolate ovaries and stipitate spadix appendix, and the second by its elongate and cylindrical tuber, variable leaf blades, longer spathe tube, basically externally green-brownish spathe limb, 3–5 rows of pistils, apically brownish dotted ovaries, disciform stigmas and recurved staminodes with a yellow apex. The ecology, distribution and assessment of conservation status of the two new taxa as well as a key to all known Typhonium species in Vietnam are provided.

 

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