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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Hordeum innermongolicum
HABIT Perennial; caespitose; clumped loosely. Culms erect, or geniculately ascending; 80–140 cm long; 3–5 -noded. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5–1 mm long. Leaf-blades 6–15 cm long; 4–6 mm wide. Leaf-blade surface pubescent; hairy adaxially.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 1; single; bilateral; 7–16 cm long; 5–7 mm wide. Rhachis fragile at the nodes; flattened. Spikelet packing broadside to rhachis. Rhachis internodes oblong; falling with spikelet above.
Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 2 in the cluster. Pedicels oblong; 0.5–1 mm long.
STERILE SPIKELETS Companion sterile spikelets well-developed; containing empty lemmas, or male (rarely); lanceolate; dorsally compressed; 6–8 mm long; shorter than fertile, or as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes subulate. Companion sterile spikelet lemmas 1; 5–7 mm long; 1-awned; with 3–4 mm long awn.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; dorsally compressed; 7–10 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes collateral; similar. Lower glume lanceolate; 6–9 mm long; 1 length of upper glume; 2–3 -veined. Lower glume lateral veins obscure. Lower glume apex setaceously attenuate. Upper glume lanceolate; 6–9 mm long; 2–3 -veined. Upper glume lateral veins obscure. Upper glume apex setaceously attenuate.
FLORETS Fertile lemma lanceolate; 7–10 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 6–8 mm long overall. Apical sterile florets distinct from fertile; rudimentary.
FLOWER Anthers 3; 2–2.3 mm long; yellow. Ovary pubescent on apex.
FRUIT Caryopsis with adherent pericarp; sulcate on hilar side; 2.5–3.5 mm long; hairy at apex. Hilum linear.
DISTRIBUTION Asia-temperate: China.
NOTES Triticeae. Fl China 2007.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
