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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.
Stipa vickeryana
HABIT Annual, or perennial; caespitose. Culms 20–45 cm long; 2–2.5 mm diam.; 1–2 -noded. Culm-internodes distally glabrous. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths loose; glabrous on surface; outer margin hairy. Ligule a ciliolate membrane; 2.5–8 mm long; lacerate. Leaf-blades flat, or conduplicate; 9–18 cm long; 1.5–4 mm wide. Leaf-blade surface ribbed; puberulous; hairy adaxially. Leaf-blade apex pungent.
INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.
Panicle open; 9–20 cm long.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 14–18 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 2.5–3 mm long; pubescent; pungent.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 14–18 mm long; 1.3–1.5 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface asperulous; rough on veins; glabrous, or pubescent; hairy between veins. Lower glume apex acuminate. Upper glume lanceolate; 9–14 mm long; membranous; without keels; 5 -veined. Upper glume surface asperulous; rough on veins; glabrous, or pubescent; hairy between veins. Upper glume apex acuminate.
FLORETS Fertile lemma linear; subterete; 6–7 mm long; cartilaginous; dark brown; shiny; without keel; 5 -veined. Lemma surface glabrous. Lemma margins flat; covering most of palea. Lemma apex scabrous; with a short cylindrical neck and surmounted by a ring of hairs; with this appendage 1–1.5 mm long (as to haira); awned; 1 -awned. Principal lemma awn straight, or flexuous, or bigeniculate; 90–115 mm long overall; without a column, or with twisted column. Middle segment of lemma awn 11–14 mm long. Column of lemma awn 15–18 mm long; pubescent; with 0.2–0.3 mm long hairs. Palea 1 length of lemma; 2 -veined; without keels.
FLOWER Lodicules 3. Anthers 3. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum linear.
DISTRIBUTION Australasia: Australia.
NOTES Stipeae. Vickery etc 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
