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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Dasypyrum villosum

HABIT Annual; caespitose. Culms decumbent; 25–70 cm long. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades 2–15 cm long; 2–4 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; oblong; bilateral; 4–10 cm long. Rhachis fragile at the nodes; villous on margins. Spikelet packing broadside to rhachis. Rhachis internodes oblong; falling with spikelet above.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 7–20 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes similar; shorter than spikelet. Lower glume oblong; 1 length of upper glume; coriaceous; much thinner on margins; 2-keeled; 5 -veined. Lower glume surface with tufts of hair along primary vein. Lower glume apex truncate; awned; 1 -awned. Lower glume awn 10–40 mm long. Upper glume oblong; 0.75 length of adjacent fertile lemma; coriaceous; with membranous margins; 2-keeled; 5 -veined. Upper glume lateral veins convergent at apex. Upper glume surface with tufts of hair along primary vein. Upper glume apex truncate; awned; 1 -awned. Upper glume awn 10–40 mm long.

FLORETS Fertile lemma lanceolate; 10–13 mm long; coriaceous; keeled; 5 -veined. Lemma surface glabrous, or pubescent; hairy on veins; with tufts of hair on midvein; bearing 2–10 hair tufts in all. Lemma apex entire, or dentate; 2 -fid; acuminate; awned; 1 -awned. Principal lemma awn apical, or from a sinus; 20–50 mm long overall; limb scabrous. Palea keels scabrous. Apical sterile florets 1 in number; barren; linear; 1–2 mm long.

FLOWER Ovary with a fleshy appendage below style insertion; pubescent on apex.

DISTRIBUTION Europe: southwestern, southeastern, and eastern. Africa: north. Asia-temperate: Caucasus and western Asia.

NOTES Triticeae. Fl Iraq.

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