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
  • Acrocephalus Benth. (1829)
  • Ceratanthus F.Muell. ex G.Taylor (1936)
  • Geniosporum Wall. ex Benth. (1830)
  • Hemsleia Kudô (1929)
  • Limniboza R.E.Fr. (1916)
  • Mesona Blume (1826)
  • Nosema Prain (1904)
  • Octomeron Robyns (1943)

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.