southeast Asia, Australia, Tasmania, New Guinea and New Zealand
one to three species cultivated, but not commonly available
Centrolepis banksii (R.Br.) Roem. & Schult.
C. monogyna (Hook.f.) Benth.
C. strigosa (R.Br.) Roem. & Schult.
information not available
small, tufted, grass-like herb; amphibious to aquatic, attached
Annual or perennial. Stem simple and compact. Roots numerous, hardly branched. Leaves typically basal, glabrous, sometimes purplish; sheath membranous, margin hyaline; ligulate, or not; leaf blade linear to subulate; apex acute; base straight; venation midrib only. Inflorescence a terminal, cymose head; scape terete, glabrous; head ovoid to cylindric; primary bracts 2, enclosing the head, ± opposite, rounded on the back, sheathing, glabrous, or papillate to hispid; secondary bracts 0 or 2 per flower, opposite, obtuse, hyaline. Flowers small, typically bisexual, or some lacking the stamen; perianth absent.
margin of lakes, small tarns, pools, streams, creeks, claypans, coastal swamps to peat bogs
A genus of about 25 species, many of which are amphibious. Centrolepis muscoides (Hook.f.) Hieron. grows as a perennial in submerged areas through the winter season. C. minima Kirk is aquatic or semi-aquatic, typically partially buried along lake margins. Centrolepis drummondiana is sometimes incorrectly refered to as Trithuria 'blood vomit'.