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.

Deyeuxia monticola

HABIT Perennial; caespitose; clumped densely. Culms erect; 10–70 cm long; 2–3 -noded. Leaves mostly basal. Leaf-sheaths antrorsely scabrous. Ligule a ciliolate membrane; 1–2 mm long; scaberulous on abaxial surface; obtuse. Leaf-blades aciculate; involute; 5–20 cm long; 1–2 mm wide. Leaf-blade surface scabrous. Leaf-blade apex callose.

INFLORESCENCE Inflorescence a panicle. Peduncle retrorsely scabrous above.

Panicle contracted; linear, or lanceolate; continuous, or interrupted; 5–15 cm long. Primary panicle branches appressed; 2–4 -nate; naked below, or bearing spikelets almost to the base. Panicle axis with lower internodes 1–3 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–2 mm long; scabrous.

FERTILE SPIKELETS Spikelets comprising 1(–2) fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.2–0.8 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 0.9 length of upper glume; membranous; mid-green, or purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume lanceolate; 1.2 length of adjacent fertile lemma; membranous; mid-green, or purple; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 4–5 mm long; membranous; without keel; 5 -veined. Lemma lateral veins distinct. Lemma surface scaberulous. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; geniculate; 6–8 mm long overall; with twisted column. Palea keels scaberulous; adorned above. Rhachilla extension glabrous, or sparsely hairy.

FLOWER Lodicules 2. Anthers 3; 1.5 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Vickery 1994.

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