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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 burchanbuddae

HABIT Perennial; culms solitary. Culms geniculately ascending; 45–60 cm long; 1–1.5 mm diam.; 2 -noded. Leaf-sheaths 5–12 cm long; mostly shorter than adjacent culm internode; striately veined; glabrous on surface. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades flat, or involute; 2.5–10 cm long; 1–2 mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; arcuate; bilateral; 4–6.5 cm long. Rhachis flattened; glabrous on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear; 5–7 mm long. Rhachis internode tip flat.

Spikelets appressed; solitary. Fertile spikelets sessile.

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

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate, or oblong; 2–5 mm long; 0.5 length of upper glume; coriaceous; without keels; 3–5 -veined. Lower glume surface smooth, or scabrous; rough on veins. Lower glume apex acute. Upper glume lanceolate, or oblong; 4–7 mm long; coriaceous; without keels; 3–5 -veined. Upper glume surface smooth, or scabrous; rough on veins. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 8–10 mm long; coriaceous; 5 -veined. Lemma surface puberulous; hairy above; hairy between veins. Lemma apex acute; awned; 1 -awned. Principal lemma awn curved; 10–15 mm long overall. Palea 1 length of lemma. Palea keels scaberulous. Palea apex truncate, or obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.2 mm long. Stigmas 2. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; 5 mm long; hairy at apex.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Keng 2000.

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