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Descriptions

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

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

Triticum timopheevii

HABIT Annual; caespitose. Culms erect; 71–90 cm long. Culm-internodes distally pilose. Leaf-sheaths pilose. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 1 mm long. Leaf-blades 20–45 cm long; 2–5 mm wide. Leaf-blade surface smooth, or scaberulous; pilose; hairy on both sides.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pubescent above.

Racemes 1; single; bilateral; (3.5–)5–6.5 cm long; 10–15 mm wide. Rhachis fragile at the nodes; flattened; ciliate on margins. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 1.5–1.75 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; 10–12 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes similar; shorter than spikelet. Lower glume oblong; asymmetrical; 7–10 mm long; 1 length of upper glume; coriaceous; 2-keeled; keeled all along; winged on keel (1 keel); winged near apex, or above; 5–9 -veined. Lower glume surface pubescent. Lower glume apex with a unilateral tooth. Upper glume oblong; asymmetrical; 7–10 mm long; 0.9–1 length of adjacent fertile lemma; coriaceous; 2-keeled; keeled all along; winged on keel (1 keel); winged near apex, or above; 5–9 -veined. Upper glume lateral veins divergent at apex. Upper glume surface pubescent. Upper glume apex with a unilateral tooth.

FLORETS Fertile lemma elliptic; 10–12 mm long; coriaceous; without keel; 9–11 -veined. Lemma surface pubescent. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn 50–60(–90) mm long overall. Palea 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped; 1 in number.

FLOWER Anthers 3. Ovary with a fleshy appendage below style insertion; pubescent on apex.

FRUIT Caryopsis with adherent pericarp; hairy at apex. Hilum linear.

DISTRIBUTION Asia-temperate: Caucasus and western Asia.

NOTES Triticeae. Fl Turk 1993.

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