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Descriptions

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

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

Aegilops mutica

HABIT Annual; caespitose. Culms erect, or geniculately ascending; 30–90 cm long. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule absent. Leaf-blades 5–10 cm long; 3–5 mm wide. Leaf-blade surface glabrous, or pilose; hairy adaxially; with tubercle-based hairs. Leaf-blade margins glabrous, or tuberculate-ciliate.

INFLORESCENCE Inflorescence composed of racemes; deciduous as a whole.

Racemes 1; single; linear; bilateral; 15–18 cm long; bearing 10–20 fertile spikelets on each. Rhachis fragile at the nodes (tardily); semiterete; glabrous on surface, or pubescent on surface; scaberulous on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear; 10–17 mm long; falling with spikelet above.

Spikelets appressed; solitary. Fertile spikelets sessile.

STERILE SPIKELETS Basal sterile spikelets absent.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 8–15 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes collateral; similar; shorter than spikelet. Lower glume oblong; 5–7 mm long; 1 length of upper glume; coriaceous; without keels; 5 -veined. Lower glume lateral veins ribbed. Lower glume surface glabrous, or pilose. Lower glume apex entire; emarginate, or truncate. Upper glume oblong; 5–7 mm long; 0.9 length of adjacent fertile lemma; coriaceous; without keels; 9 -veined. Upper glume lateral veins ribbed; divergent at apex. Upper glume surface glabrous, or pilose. Upper glume apex emarginate, or truncate.

FLORETS Fertile lemma oblong; 7–10 mm long; coriaceous; without keel; 5 -veined. Lemma surface glabrous, or pilose; hairy all along, or above. Lemma apex emarginate, or obtuse; muticous. Palea 2 -veined. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; ciliate. Ovary with a fleshy appendage below style insertion; pubescent on apex.

FRUIT Caryopsis with adherent pericarp; oblong; sulcate on hilar side; hairy at apex. Embryo 0.5–0.66 length of caryopsis. Hilum linear; 1 length of caryopsis. Disseminule comprising a rhachis internode.

DISTRIBUTION Asia-temperate: Caucasus and western Asia.

NOTES Triticeae. Fl Iran.

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