Arthropogon filifolius

HABIT Perennial; caespitose. Butt sheaths thickened and forming a bulb. Culms slender; 30–60 cm long; 1–1.2 mm diam. Culm-nodes glabrous. Ligule an eciliate membrane; 1 mm long. Leaf-blades filiform; involute; 10–45 cm long; 1 mm wide. Leaf-blade surface ribbed; glabrous, or pilose. Leaf-blade apex acute; smooth, or hairy.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate; effuse; 5–10 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; terete; 5–15 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 6–8 mm long; 1.2–2 mm wide; falling entire. Spikelet callus pubescent. Spikelet callus hairs 0.03 length of spikelet.

GLUMES Glumes dissimilar; reaching apex of florets; firmer than fertile lemma. Lower glume linear; 3–6 mm long; 0.5–0.75 length of spikelet; coriaceous; much thinner on margins; without keels; 3 -veined. Lower glume apex awned; 1 -awned. Lower glume awn 3–4 mm long. Upper glume oblong; 1 length of spikelet; coriaceous; without keels; 5 -veined. Upper glume awned; 1 -awned. Upper glume awn 1.2 mm long.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 length of spikelet; coriaceous; 5 -veined; scabrous; rough above; obtuse. Fertile lemma linear; 6 mm long; membranous; without keel; 3 -veined. Lemma apex obtuse. Palea 0.5 length of lemma; hyaline; without keels.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 3–4 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. Filgueiras.

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