|
Note - this takes you off
of our website |
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 biuncialis
HABIT Annual; caespitose. Culms geniculately ascending; 5–30 cm long. Leaf-sheaths pilose. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades 2–5 cm long; 2–3 mm wide. Leaf-blade surface glabrous, or pilose.
INFLORESCENCE Inflorescence composed of racemes; deciduous as a whole.
Racemes 1; single; lanceolate; bilateral; 1.5–2 cm long; bearing few fertile spikelets; bearing 2–3(–4) fertile spikelets on each. Rhachis tough. Spikelet packing broadside to rhachis; with upper internodes elongated.
Spikelets solitary. Fertile spikelets sessile.
STERILE SPIKELETS Basal sterile spikelets rudimentary; 1–2 in number.
FERTILE SPIKELETS Spikelets comprising 4–5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 8–11 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; shorter than spikelet. Lower glume oblong, or obovate; 7–10 mm long; 1 length of upper glume; coriaceous; without keels; 7–9 -veined. Lower glume lateral veins unequally thickened; ribbed. Lower glume surface pubescent, or pilose. Lower glume apex truncate; awned; 2–3 -awned. Lower glume awn 20–70 mm long. Upper glume oblong, or obovate; 7–10 mm long; 0.9 length of adjacent fertile lemma; coriaceous; without keels; 7–9 -veined. Upper glume lateral veins unequally thickened; ribbed; parallel at apex. Upper glume surface pubescent, or pilose. Upper glume apex truncate; awned; 2–3 -awned. Upper glume awn 20–70 mm long.
FLORETS Fertile lemma oblong; 8–11 mm long; coriaceous; without keel; 5 -veined. Lemma apex dentate; 1–2 -fid; awned; 1–2 -awned. Principal lemma awn subterete below; 8–30 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 Europe: southwestern, southeastern, and eastern. Africa: north and Macaronesia. Asia-temperate: Soviet Middle Asia, Caucasus, and western Asia.
NOTES Triticeae. Fl Turk 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
