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 procerum

HABIT Perennial; caespitose. Culms erect; 40–80 cm long; 3–5 -noded. Leaf-sheaths glabrous on surface, or pilose. Leaf-sheath auricles absent, or falcate. Ligule an eciliate membrane; 1.5 mm long; truncate. Leaf-blades 3.5–6 mm wide. Leaf-blade surface scabrous; rough abaxially; pubescent; hairy adaxially, or on both sides. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; bilateral; 7–11 cm long. Rhachis fragile at the nodes; flattened; pubescent on margins. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 1–2 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; 1–1.3 mm long.

STERILE SPIKELETS Companion sterile spikelets well-developed; containing empty lemmas; lanceolate; dorsally compressed; 17–20 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes similar in width; subulate; 17–20 mm long; scabrous. Companion sterile spikelet lemmas 1; 4–7.5 mm long; muticous, or 1-awned.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; dorsally compressed; 15–20 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes collateral; similar; exceeding apex of florets; gaping. Lower glume subulate; 15–20 mm long; 1 length of upper glume; coriaceous. Upper glume subulate; 15–20 mm long; coriaceous.

FLORETS Fertile lemma lanceolate; 7–8 mm long; coriaceous; yellow, or mid-green; without keel; 5 -veined. Lemma surface asperulous; rough generally. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 11–15 mm long overall. Palea 6.5–7.5 mm long. Rhachilla extension 4–6 mm long.

FLOWER Lodicules 2; lanceolate; 1.6–1.8 mm long; ciliate. Anthers 3; 1.5–2.5 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; 4.5–5 mm long; hairy at apex. Hilum linear.

DISTRIBUTION South America: southern South America.

NOTES Triticeae. Fl Pat 1995.

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