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Descriptions

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

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

Secale vavilovii

HABIT Annual. Culms erect, or geniculately ascending; 20–50 cm long. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades flat, or convolute; 10–20 cm long; 2–5 mm wide; glaucous. Leaf-blade surface scabrous; rough adaxially; pilose; hairy on both sides.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; erect; bilateral; 4–8 cm long; 6–8 mm wide. Rhachis fragile at the nodes; ciliate on margins. Spikelet packing broadside to rhachis; crowded. Rhachis internodes oblong; 2–2.5 mm long; falling with spikelet above.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension, or with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 10–12 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume linear; 6–8 mm long; 1 length of upper glume; membranous; 1-keeled; keeled all along; 1 -veined. Lower glume primary vein ciliate. Lower glume lateral veins absent. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 2–2.5 mm long. Upper glume linear; 6–8 mm long; membranous; 1-keeled; keeled all along; 1 -veined. Upper glume primary vein ciliate. Upper glume lateral veins absent. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 2–2.5 mm long.

FLORETS Fertile lemma lanceolate; 10–11 mm long; coriaceous; keeled; 5 -veined. Lemma midvein pectinately ciliate. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 10–20 mm long overall; limb scabrous. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets 1 in number; barren.

FLOWER Lodicules 2; ciliate. Anthers 3; 5–6 mm long. Ovary with a fleshy appendage below style insertion; pubescent on apex.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: Caucasus.

NOTES Triticeae. Fl USSR 1996.

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