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Descriptions

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

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

Elymus anthosachnoides

HABIT Perennial; culms solitary, or caespitose; clumped loosely. Culms erect, or geniculately ascending; 60–75 cm long; 1.5–2.5 mm diam.; 4–6 -noded. Culm-internodes smooth. Leaf-sheaths loose; glabrous on surface. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades 11–25 cm long; 3–5–7 mm wide. Leaf-blade surface hirsute; hairy adaxially, or on both sides.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; drooping; bilateral; 8–9 cm long; bearing 6–8 fertile spikelets on each. Rhachis flattened; puberulous on surface; ciliate on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 7–14 mm long.

Spikelets solitary. Fertile spikelets sessile.

STERILE SPIKELETS Basal sterile spikelets well-developed; 3–4 in number.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 24–30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3 mm long; pilose. Floret callus pubescent.

GLUMES Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate; 5–7.5 mm long; coriaceous; without keels; 3–7 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acute; muticous. Upper glume oblong; 7–9 mm long; coriaceous; without keels; 3–7 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acute; muticous.

FLORETS Fertile lemma lanceolate; 13–14 mm long; coriaceous; without keel; 5 -veined. Lemma surface hirsute. Lemma hairs 1–1.5 mm long. Lemma apex awned; 1 -awned. Principal lemma awn reflexed; 20–35 mm long overall. Palea 0.9–1 length of lemma; 2 -veined. Palea surface puberulous; hairy on back; hairy above. Apical sterile florets resembling fertile though underdeveloped.

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

FRUIT Caryopsis with adherent pericarp; hairy at apex; apex unappendaged. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Chen 2001.

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