Plants perennial; cespitose, shortly rhizomatous, reedlike. Culms 1.5-4 m, woody, persistent, glabrous, usually not branched above the base; internodessolid. Leaves cauline, distichous; sheaths open; auricles sometimes present; ligules membranous to somewhat leathery, entire, minutely erose, or ciliolate; pseudopetioles poorly developed; blades flat, disarticulating from the sheaths when old, cross venation not evident. Inflorescences terminal, open diffuse panicles; disarticulation at the pedicel bases, subsequently below the spikelets. Spikelets solitary, pedicellate, terete, with 2(3-4) florets, lowest floret in each spikelet sterile; rachilla extension prolonged, often terminating in a rudimentary floret. Glumes membranous, shorter than the florets, 0-1-veined, obtuse; lowest florets equaling the upper florets, sterile; lowest lemmas membranous, 1-3-veined; lowest paleas not present; upper florets bisexual; upper lemmas membranous, 3-veined, unawned, marginal veins with papillose-based hairs, hairs 0.8-1.5 mm, strongly diverging at maturity; upper paleas about 1/2 as long as the lemmas, apices notched; lodicules 2, free, broadly cuneate, truncate to irregularly lobed; anthers 2(3). Caryopses nearly spherical to broadly ovoid; embryos about 3/4 as long as the caryopses; hila subbasal, punctate. x = 12. Name from the Greek thysanos, fringe, and laina, cloak, a reference to the second lemma.
Thysanolaena is a genus of one species that is native to tropical Asia where it grows in open habitats, generally in mountainous areas. Its only species is grown as an ornamental in the Flora region.
SELECTED REFERENCEBaaijens, G.J. and J.F. Veldkamp. 1991. Sporobolus (Gramineae) in Malesia. Blumea 35:393-458.