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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Hordeum parodii

HABIT Perennial; caespitose. Culms 40–100 cm long. Leaf-sheaths pubescent. Leaf-sheath auricles absent, or falcate. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades 7–11 cm long; 4.5–7 mm wide; glaucous. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; bilateral; 8–15 cm long. Rhachis fragile at the nodes; flattened; ciliate on margins. Rhachis hairs 0.1–0.2 mm long. 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; curved; 1–1.5 mm long.

STERILE SPIKELETS Companion sterile spikelets well-developed; male; lanceolate; dorsally compressed; 5.5–10 mm long; as long as fertile, or longer than fertile; deciduous with the fertile. Companion sterile spikelet glumes similar in width; indurate; 5.5–10 mm long. Companion sterile spikelet lemmas 1; 4–6 mm long; muticous, or 1-awned.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets lanceolate; dorsally compressed; 6–9 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes collateral; similar; shorter than spikelet, or reaching apex of florets; gaping. Lower glume lanceolate; 5.5–8 mm long; 1 length of upper glume; coriaceous. Lower glume surface scabrous. Lower glume apex setaceously attenuate. Upper glume lanceolate; 5.5–8 mm long; coriaceous. Upper glume surface scabrous. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma lanceolate; 6–9 mm long; coriaceous; without keel; 5 -veined. Lemma surface scabrous; rough above. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2–3.5 mm long overall. Palea 1 length of lemma. Palea surface scabrous. Rhachilla extension 3–5.5 mm long.

FLOWER Lodicules 2; 1–1.8 mm long; ciliate; acute. Anthers 3; 3–4 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; 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.