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 sacandros

HABIT Perennial; caespitose. Basal innovations extravaginal and intravaginal. Culms erect; 15–40 cm long; rooting from lower nodes. Leaf-sheaths 3–12 cm long; ribbed; scaberulous; glabrous on surface. Leaf-sheath oral hairs lacking, or pubescent. Leaf-sheath auricles absent, or falcate; 0.5–1 mm long. Ligule an eciliate membrane; 0.2–0.3 mm long. Collar pilose. Leaf-blades filiform; involute; 10–80 cm long; 0.5–0.7 mm wide; glaucous. Leaf-blade surface ribbed; pubescent; hairy adaxially. Leaf-blade margins ciliate; hairy at base.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; bilateral; 5–20 cm long; bearing 4–8 fertile spikelets on each. Rhachis flattened. Spikelet packing broadside to rhachis. Rhachis internodes linear. Rhachis internode tip flat.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 6–8 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 40–60 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2–3 mm long; pilose. Floret callus 1–1.5 mm long; bearded. Floret callus hairs 1.5–2.5 mm long.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4.5–6.5 mm long; 0.5–0.66 length of upper glume; coriaceous; without keels; 3–5 -veined. Lower glume apex setaceously attenuate. Upper glume lanceolate; 7–11 mm long; coriaceous; without keels; 5–7 -veined. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma lanceolate; 10–11.5 mm long; coriaceous. Lemma midvein thickened. Lemma surface scaberulous; rough above. Lemma margins scaberulous. Lemma apex awned; 1 -awned. Principal lemma awn curved; 25–60 mm long overall. Palea 10–11.5 mm long. Palea apex dentate; 2 -fid; acute. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; 1.5–2 mm long; membranous. Anthers 3; 3.8–5.5 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; 5–6 mm long. Embryo 0.25 length of caryopsis.

DISTRIBUTION Australasia: New Zealand.

NOTES Triticeae. Connor 2000.

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