Hydrothrix

Hydrothrix Hook.f.^[2] was previously a monotypic flowering plant genus of Pontederiaceae, but is currently included in a broader and monophyletic Heteranthera.^[1]

Hydrothrix
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Commelinales
Family:	Pontederiaceae
Genus:	Heteranthera
Species:	H. gardneri
Binomial name
Heteranthera gardneri (Hook.f.) M.Pell.[1]
Synonyms
Hydrothrix gardneri Hook.f. Hydrothrix verticillaris Hook.f. Hookerina gardneri Kuntze, Rev. Gen. 2: 718. 1891

The highly modified Heteranthera gardneri is a submerged aquatic with a two-flowered pseudanthium found in eastern Brazil. It is used as an aquarium plant.