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.

Hordeum roshevitzii

HABIT Perennial; caespitose. Culms erect, or geniculately ascending; 25–90 cm long; 3–6 -noded. Culm-nodes glabrous. Leaf-sheaths glabrous on surface, or pubescent. Leaf-sheath oral hairs lacking. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 0.3–0.4 mm long. Leaf-blades 4–8 cm long; 2–4 mm wide. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; linear; bilateral; 3–8 cm long; 3–5 mm wide. Rhachis fragile at the nodes; flattened; scabrous on margins; glabrous on margins. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 1–1.5 mm long; falling with spikelet above.

Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 2 in the cluster. Pedicels oblong; 1.2–2 mm long.

STERILE SPIKELETS Companion sterile spikelets well-developed; containing empty lemmas, or male (rarely); lanceolate; dorsally compressed; 6–12 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes subulate. Companion sterile spikelet lemmas 1; 4.2 mm long; 1-awned; with 5–9 mm long awn.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; dorsally compressed; 5–9 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes collateral; similar; recurved at apex. Lower glume subulate; 5–9 mm long; 1 length of upper glume. Upper glume subulate; 5–9 mm long.

FLORETS Fertile lemma lanceolate; 4–6 mm long; coriaceous; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn curved; spreading; 3–10 mm long overall; limb scabrous. Rhachilla extension 2–4 mm long.

FLOWER Anthers 3; 1–1.7 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; sulcate on hilar side; hairy at apex. Hilum linear.

DISTRIBUTION Asia-temperate: Siberia, Soviet far east, Soviet Middle Asia, China, and Mongolia.

NOTES Triticeae. Bothmer 1993.

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