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Taiwan Gramineae | Family List | Poaceae | Digitaria

Digitaria ischaemum (Schreb.) Schreb. ex Muhl., Descr. Gram. 131. 1817; Hsu, Fl. Taiwan 5: 544. 1978.


Digitaria ischaemum

Credit: CC Hsu

Panicum ischaemum Schreb., Spec. Fl. Erlang. 16. 1804.

Annuals; culms tufted, erect or ascending, 30-60 cm high. Sheaths loose, keeled, usually shorter than internode; ligule membranaceous, ca. 2 mm long; blade 2-10 cm long, 2-5 mm wide, leaf-base rounded. Racemes 2-5, 1-20 cm long, digitately arranged; rachis 0.8-1.2 mm wide, indurate, margins scabrous, green; midrib white, narrow, each node with 2-3 spikelets. Spikelets elliptic, 1.5-2.3 mm long, greyish green or purplish; lower glume minute or absent, translucently membranaceous, veinless; upper glume equaling spikelet or slightly shorter, narrow, 3-veined, interveins and margins coverd with soft clavate hairs; lower lemma 5-veined, interveins and margins also clavate hairs; upper floret coriaceous, blackish brown when mature, equaling spikelet. Caryopsis ca. 1.2 mm long.

TAIPEI: Chinshan, Hsu 1300.

The temperate regions of the world. Taiwan, in open waste places of the northeastern part.


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