Dimeria paniculata

HABIT Annual. Culms erect; slender; 24 cm long. Leaf-sheaths 1.5–4.5 cm long; as wide as blade at the collar; glabrous on surface. Leaf-sheath oral hairs scanty, or ciliate. Ligule a ciliolate membrane; 0.5 mm long; truncate. Leaf-blades 4–5 cm long; 2.5 mm wide. Leaf-blade surface glabrous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes (3–)4; digitate; unilateral; 5–7 cm long. Rhachis flattened; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed. Rhachis internodes 0.5–1.5 mm long.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels reduced to a stump; flattened; pubescent.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; 2 mm long; falling entire. Spikelet callus base obtuse.

GLUMES Glumes dissimilar; with lower narrower than upper; exceeding apex of florets; firmer than fertile lemma. Lower glume linear; 2 mm long; 1 length of spikelet; chartaceous; 1-keeled. Lower glume apex acute. Upper glume lanceolate; 1 length of spikelet; chartaceous, or coriaceous; 1-keeled; wingless. Upper glume primary vein ciliolate. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1.5 mm long; hyaline. Fertile lemma lanceolate; 1.8 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 5.5 mm long overall; with twisted column. Palea absent or minute.

DISTRIBUTION Pacific: northwestern.

NOTES Andropogoneae. Hosokawa 2007.

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