Dimeria monostachya

HABIT Annual. Culms erect; 25–45 cm long; 7 -noded. Culm-nodes pubescent. Leaf-sheaths keeled; pilose. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades flat, or conduplicate; 4–8 cm long; 2–3 mm wide. Leaf-blade surface pilose; hairy on both sides.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; unilateral; 5–7 cm long. Rhachis flattened; 0.8 mm wide; ciliate on margins.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.2 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; 3.5–4 mm long; falling entire.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 0.9 length of spikelet; coriaceous; 1-keeled; 3 -veined. Lower glume primary vein ciliate. Lower glume surface pilose. Lower glume hairs white. Lower glume apex acute. Upper glume elliptic; coriaceous; 1-keeled; winged on keel; winged all along; 3 -veined. Upper glume primary vein ciliate. Upper glume surface pilose. Upper glume hairs white. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2–2.5 mm long; hyaline. Fertile lemma elliptic; 2.5–3 mm long; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 8 mm long overall; with twisted column. Column of lemma awn 1–1.5 mm long; glabrous. Palea absent or minute.

FLOWER Anthers 2; 0.8 mm long.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Andropogoneae. Reeder 1993.

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