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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Agrostis vidalii
HABIT Perennial. Rhizomes elongated. Culms erect; 20–60 cm long. Culm-nodes brown, or purple; glabrous. Leaf-sheaths 2–14 cm long; smooth, or scaberulous. Ligule an eciliate membrane; 2–3.5 mm long; erose; obtuse. Leaf-blades 2–11 cm long; 2–3 mm wide. Leaf-blade surface scabrous; rough adaxially.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; oblong; 6–15 cm long. Panicle axis smooth, or with occasional prickles. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; hairy in 2 tufts.
GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3–4 mm long; 1.5–1.6 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
FLORETS Fertile lemma elliptic; 2–2.5 mm long; hyaline; without keel; 5 -veined. Lemma surface scaberulous; rough on veins. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.75 way up back of lemma; 0.5 mm long overall. Palea 1.1–1.5 mm long; hyaline.
FLOWER Lodicules 2; 0.6–0.8 mm long; membranous. Anthers 3; 1.5 mm long.
FRUIT Caryopsis with adherent pericarp; 1.2–1.6 mm long. Hilum linear.
DISTRIBUTION South America: southern South America.
NOTES Aveneae. Fl Pat 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.