Digitaria pinetorum

HABIT Perennial; caespitose. Culms erect; slender; 30–80 cm long. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades flat, or involute; 1–2 mm wide. Leaf-blade surface glabrous, or puberulous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1–2; single, or paired; unilateral; 4–10 cm long. Rhachis angular; 0.3 mm wide.

Spikelets appressed; in pairs, or in threes. Fertile spikelets pedicelled. Pedicels unequal; 2 mm long (longest pedicel).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or elliptic; dorsally compressed; 2–2.2 mm long; with hairs extending 0.2 mm beyond apex; falling entire.

GLUMES Glumes one the lower absent or obscure; shorter than spikelet; thinner than fertile lemma. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pubescent. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 5 -veined; pubescent; acute. Fertile lemma elliptic; 2–2.2 mm long; cartilaginous; much thinner on margins; dark brown; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.

DISTRIBUTION South America: Caribbean.

NOTES Paniceae. Man Gr US 1994.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.