Hydrotriche

Scientific name

Hydrotriche Zucc.

Common names

hydrotriche

Family

Scrophulariaceae

Could be confused with

Ceratophyllum, Hippuris, Hottonia, Hydrothrix

Native distribution

Madagascar

Species commonly cultivated

Hydrotriche hottoniiflora Zucc. (Madagascar)

Adventive distribution

none

Weed status

not weedy

Habit

submersed, attached stem plant

Brief description

Perennial or annual. Stems mostly erect or creeping, elongate, delicate, rarely branching. Leaves relatively evenly spaced along stem in whorls of 10-20, sessile, linear to lanceolate; margin entire but serrulate apically. Inflorescence an erect raceme of 2-5 flowers; pedicels present or absent. Flowers weakly zygomorphic; sepals 5; corolla tubular, 2-lipped, lobes subequal; adaxial lip 2-lobed, abaxial lip 3- lobed, white, blue, pink or yellow. Dispersal by stem fragments and possibly seed.

Natural habitat

found in both still and fast flowing water

Additional comments

Four species are described in this genus, all from Madagascar, but only Hydrotriche hottoniiflora is cultivated for aquaria.