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Six new species of Argostemma Wall. (Rubiaceae) from Laos
Author(s) -
Lanorsavanh Soulivanh,
Chantaranothai Pranom,
Souvannakhoummane Keooudone
Publication year - 2020
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/njb.02714
Subject(s) - rubiaceae , biology , taxonomy (biology) , herbaceous plant , southeast asia , key (lock) , habitat , botany , tribe , genus , central asia , ecology , geography , ethnology , anthropology , history , physical geography , sociology
Argostemma Wall. is a large genus of herbaceous plants in the tribe Argostemmateae (Rubiaceae–Rubioideae), mainly distributed in Southeast Asia and its taxonomy is far from completely known. Eight species of Argostemma were previously reported from Laos, but we here add six more species ( Argostemma lamxayanum , A. lobbioides , A. longisepalum , A. paksongense , A. svengsuksae and A. vientianense ) which are all new to science. The new species were found in limestone habitats in southern and central Laos. Detailed descriptions, illustrations, photographs and a key to all the known species in Laos are provided.