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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Triticum dicoccon
HABIT Annual. Culms 80–100 cm long. Culm-nodes glabrous, or pubescent. Leaf-sheaths glabrous on surface, or pilose; outer margin hairy. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades 30–60 cm long; 10–20 mm wide. Leaf-blade surface scaberulous.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 1; single; bilateral; 3–10 cm long; 10–13 mm wide. Rhachis fragile at the nodes; flattened; glabrous on surface, or pubescent on surface; glabrous on margins, or pubescent on margins. Rhachis hairs mainly at internode tip; 1–2 mm long. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 3 mm long; 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; 9–12 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; shorter than spikelet. Lower glume oblong; 7–10 mm long; 1 length of upper glume; coriaceous; 1-keeled; keeled all along; 5–9 -veined. Lower glume apex emarginate. Upper glume oblong; 7–10 mm long; 0.9–1 length of adjacent fertile lemma; coriaceous; 1-keeled; keeled all along; 5–9 -veined. Upper glume lateral veins divergent at apex. Upper glume apex emarginate.
FLORETS Fertile lemma elliptic; 9–12 mm long; coriaceous; without keel; 9–11 -veined. Lemma apex awned; 1 -awned. Principal lemma awn 100–150 mm long overall. Palea 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped; 1–2 in number.
FLOWER Anthers 3. Ovary with a fleshy appendage below style insertion; pubescent on apex.
FRUIT Caryopsis with adherent pericarp; 7–9 mm long; hairy at apex. Hilum linear.
DISTRIBUTION Europe: southeastern and eastern. Africa: north, northeast tropical, and southern tropical. Asia-temperate: Caucasus, western Asia, and Arabia. Asia-tropical: India.
NOTES Triticeae. Fl Turk 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
