Heterostemma brownii is reported as a new record for the floras of Laos and Thailand. A lectotype is also designated for the name Heterostemma brownii. A description based on Thai and Lao collections, photographs and notes are provided.
Heterostemma menghaiense is reported as a new record for the flora of Laos and Thailand. A description based on Thai and Lao collections, photographs and notes are provided.
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