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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 solandri

HABIT Perennial; culms solitary, or caespitose. Stolons present. Basal innovations extravaginal and intravaginal. Culms geniculately ascending, or decumbent, or prostrate; 40–100 cm long; rooting from lower nodes. Leaf-sheaths 3–5 cm long; keeled; puberulous. Leaf-sheath oral hairs pubescent. Leaf-sheath auricles falcate; 1–1.5 mm long. Ligule an eciliate membrane; 0.2–0.5 mm long; truncate. Collar pubescent. Leaf-blades flat, or conduplicate, or involute; 15–21 cm long; 2–4 mm wide; glaucous. Leaf-blade surface ribbed; puberulous; hairy adaxially. Leaf-blade margins smooth, or scaberulous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; bilateral; 8–20 cm long; bearing 3–15 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 4–10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 25–80 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5–3 mm long; pubescent. Floret callus 0.75 mm long; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3–11 mm long; 0.66 length of upper glume; coriaceous; 1-keeled; 3 -veined. Lower glume surface asperulous; rough above. Lower glume apex acuminate to setaceously attenuate. Upper glume lanceolate; 5–12 mm long; coriaceous; 1-keeled; 3–5 -veined. Upper glume surface asperulous; rough above. Upper glume apex acuminate to setaceously attenuate.

FLORETS Fertile lemma lanceolate; 10–13 mm long; coriaceous. Lemma midvein thickened. Lemma margins scaberulous. Lemma apex awned; 1 -awned. Principal lemma awn curved; reflexed; 35–75 mm long overall. Palea 9.5–12 mm long. Palea apex dentate; 2 -fid; acute. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; 1.25–1.5 mm long; membranous. Anthers 3; 3–5 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; 5–6.5 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.