GrassBase - The Online World Grass Flora


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

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

Elymus angulatus

HABIT Perennial; caespitose. Rhizomes absent, or short. Culms 50–200 cm long; 5–8 -noded. Leaf-sheaths glabrous on surface, or pubescent. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 1–3 mm long; truncate. Leaf-blades 3–12 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous, or pubescent; hairy adaxially, or on both sides.

INFLORESCENCE Inflorescence composed of racemes. Peduncle smooth, or retrorsely scabrous above.

Racemes 1; single; bilateral; 10–15 cm long. Rhachis scabrous on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear. Rhachis internode tip flat.

Spikelets in pairs, or in threes. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10–18 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous.

GLUMES Glumes persistent; similar; with lower wider than upper; shorter than spikelet. Lower glume lanceolate; 6.5–9 mm long; 1 length of upper glume; coriaceous; without keels; 4–5 -veined. Lower glume lateral veins ribbed. Lower glume surface scabrous; rough on veins. Lower glume apex acuminate; muticous, or awned; 1 -awned. Lower glume awn 1–5 mm long. Upper glume lanceolate; 6.5–9 mm long; 0.75–1 length of adjacent fertile lemma; coriaceous; without keels; 3 -veined. Upper glume lateral veins ribbed. Upper glume surface scabrous; rough on veins. Upper glume apex acuminate; muticous, or awned; 1 -awned. Upper glume awn 1–5 mm long.

FLORETS Fertile lemma lanceolate; 6.5–12 mm long; coriaceous; 5–7 -veined. Lemma surface scabrous; rough above. Lemma apex dentate; 2 -fid; acute; awned; 1 -awned. Principal lemma awn from a sinus; 11–15 mm long overall. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 2–3.5 mm long. Stigmas 2. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: western South America and southern South America.

NOTES Triticeae. Fl Pat 1995.

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