Platostoma
| Platostoma | |
|---|---|
| Platostoma africanum | |
| Scientific classification | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Clade: | Asterids | 
| Order: | Lamiales | 
| Family: | Lamiaceae | 
| Subfamily: | Nepetoideae | 
| Tribe: | Ocimeae | 
| Genus: | Platostoma P.Beauv. (1818) | 
| Species | |
| 51; see text | |
| Synonyms | |
| 
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Platostoma is a genus of flowering plants in the mint family, Lamiaceae, first described as a genus in 1818. It is native to tropical parts of Africa, southern Asia, Papuasia, and Australia. Mesona and Acrocephalus has been known as its synonyms.
A widely consumed species in this genus is Platostoma palustre (synonyms Mesona chinensis, M. elegans, and M. procumbens), or xiancao (仙草) in Mandarin, sian-chháu (仙草) in Taiwanese, leung fun cho (涼粉草) in Cantonese, sương sáo in Vietnamese, and cincau in Indonesian and Malay. It is eaten as a snack in drinks, or set as a gel and served as a grass jelly.
In Indonesia the Platostoma palustre leaf is used to make a black jelly; there is also an instant powder variety available.