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.

中文翻译：

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Argostemma Wall的六个新种。（蔷薇科）来自老挝

Argostemma墙。它是Argostemmateae（Rubiaceae–Rubioideae）部落的一种大型草本植物，主要​​分布在东南亚，其分类学还远未完全清楚。八个品种的雪花属以前从老挝的报道，但我们在这里添加六个品种（雪花属lamxayanum，A. lobbioides，A. longisepalum，A. paksongense，A. svengsuksae和A. vientianense），这都是新的科学。在老挝南部和中部的石灰岩生境中发现了新物种。提供了详细的说明，插图，照片以及老挝所有已知物种的钥匙。