Trichoneura weberbaueri

HABIT Annual. Culms 5–20 cm long. Ligule an eciliate membrane. Leaf-blades flat, or involute; 1.5–3 cm long; 1–1.5 mm wide.

INFLORESCENCE Inflorescence composed of racemes.

Racemes borne along a central axis; unilateral; 1.5–2 cm long. Central inflorescence axis 1–2 cm long. Rhachis deciduous from axis; angular. Spikelet packing broadside to rhachis.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–6 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4.5–6 mm long; falling entire; deciduous with accessory branch structures; readily shedding fertile florets.

GLUMES Glumes similar; shorter than spikelet; gaping. Lower glume lanceolate; 3–3.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex setaceously attenuate. Upper glume lanceolate; 4–5 mm long; 1.3–1.6 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma oblong; 3–3.2 mm long; membranous; keeled; lightly keeled; 3 -veined. Lemma margins ciliate. Lemma hairs 1–1.7 mm long. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 1–1.5 mm long overall. Palea 1 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

DISTRIBUTION South America: western South America.

NOTES Eragrostideae. Gr Peru 1997.

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