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 erectifolium

HABIT Perennial; caespitose; clumped densely. Culms erect; 40–80 cm long; 4–5 -noded. Culm-nodes glabrous. Leaf-sheaths 10–12 cm long; glabrous on surface. Ligule an eciliate membrane. Leaf-blades erect; flat, or involute; 3–17 cm long; 1.5–3.5 mm wide; glaucous. Leaf-blade surface smooth, or scaberulous; rough abaxially; pubescent; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes. Peduncle 35–40 cm long.

Racemes 1; single; bilateral; 4–5 cm long; 5–6 mm wide; bearing 45 fertile spikelets on each. Rhachis fragile at the nodes; flattened. Spikelet packing broadside to rhachis. Rhachis internodes cuneate; 0.9–1 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; curved; 2 mm long.

STERILE SPIKELETS Companion sterile spikelets well-developed; containing empty lemmas; lanceolate; dorsally compressed; 11.5–11.8 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes similar in width; subulate; 11.5–11.8 mm long. Companion sterile spikelet lemmas 1; 1.9–2 mm long; 1-awned; with 0.5 mm long awn.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; dorsally compressed; 8.8–10.5 mm long; 1.2–1.3 mm wide; falling entire; deciduous with accessory branch structures.

GLUMES Glumes collateral; similar; exceeding apex of florets; gaping. Lower glume subulate; 8.8–10.5 mm long; 1 length of upper glume; coriaceous. Upper glume subulate; 8.8–10.5 mm long; coriaceous.

FLORETS Fertile lemma lanceolate; 6.5–7 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy above. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 8.5–11.5 mm long overall. Rhachilla extension 2.8–3.4 mm long.

FLOWER Lodicules 2; 1 mm long; ciliate. Anthers 3; 2–2.9 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; hairy at apex. Hilum linear.

DISTRIBUTION South America: southern South America.

NOTES Triticeae. Bothmer 1997.

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