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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.
Aegilops peregrina
HABIT Annual; caespitose. Culms erect, or geniculately ascending; 9–13 cm long. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades 3–6 cm long; 2–3 mm wide. Leaf-blade surface pubescent; hairy on both sides.
INFLORESCENCE Inflorescence composed of racemes; deciduous as a whole.
Racemes 1; single; lanceolate, or ovate; bilateral; 1–2 cm long; bearing few fertile spikelets; bearing 2–7 fertile spikelets on each. Rhachis tough. Spikelet packing broadside to rhachis.
Spikelets solitary. Fertile spikelets sessile.
STERILE SPIKELETS Basal sterile spikelets rudimentary; 2–3 in number.
FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 5–7 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; shorter than spikelet. Lower glume oblong, or obovate; 3–5 mm long; 1 length of upper glume; coriaceous; without keels; 7–9 -veined. Lower glume lateral veins distinct; ribbed. Lower glume surface scabrous; rough on veins. Lower glume apex dentate; truncate; awned; 2–3 -awned. Lower glume awn 9–24 mm long. Upper glume oblong, or obovate; 3–5 mm long; 0.66 length of adjacent fertile lemma; coriaceous; without keels; 7–9 -veined. Upper glume lateral veins distinct; ribbed; parallel at apex. Upper glume surface scabrous; rough on veins. Upper glume apex dentate; 2–3 -fid; truncate; awned; 2–3 -awned. Upper glume awn 9–25 mm long.
FLORETS Fertile lemma oblong; 4.5–7.5 mm long; coriaceous; without keel; 5 -veined. Lemma apex entire, or erose; emarginate, or truncate; muticous, or awned only on distal spikelets (shortly); 1 -awned. Principal lemma awn 20–120 mm long overall. Palea 2 -veined. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2. Ovary pubescent on apex.
FRUIT Caryopsis with adherent pericarp; hairy at apex. Disseminule comprising a inflorescence.
DISTRIBUTION Africa: north. Asia-temperate: western Asia and Arabia.
NOTES Triticeae. Fl Turk 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
