Dimeria solitaria

HABIT Annual. Culms erect, or geniculately ascending; 9–19 cm long; 3–6 -noded. Lateral branches lacking. Leaf-sheaths puberulous; with tubercle-based hairs. Ligule an eciliate membrane; 0.4 mm long. Leaf-blades 1–3 cm long; 1–2.5 mm wide. Leaf-blade surface glabrous, or pilose; hairy adaxially; with tubercle-based hairs. Leaf-blade margins tuberculate-ciliate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; unilateral; 1.5–2.5 cm long. Rhachis flattened; 1 mm wide; ciliate on margins. Spikelet packing regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels oblong; flattened; 0.5 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; 3 mm long; falling entire. Spikelet callus base obtuse.

GLUMES Glumes dissimilar; reaching apex of florets; firmer than fertile lemma. Lower glume linear; 1 length of spikelet; chartaceous; red; 1-keeled. Lower glume primary vein ciliate. Lower glume margins ciliolate. Lower glume apex obtuse. Upper glume lanceolate; 1 length of spikelet; chartaceous; 1-keeled; winged on keel; winged above. Upper glume primary vein ciliate. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile lemma elliptic; 2 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 8–12 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 2; 0.8 mm long.

DISTRIBUTION Asia-temperate: China.

NOTES Andropogoneae. Fl China 2007.

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