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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 flavescens
HABIT Perennial; caespitose. Rhizomes short. Butt sheaths grey; pubescent. Culms erect, or geniculately ascending; robust; 40–80 cm long; 3–4 -noded. Culm-nodes pubescent. Leaf-sheaths glabrous on surface; outer margin glabrous, or hairy. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane; 0.5 mm long; truncate. Leaf-blades convolute; 9–54 cm long; 2–5 mm wide; stiff. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade apex attenuate.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; linear; 15–30 cm long; 2 cm wide. Panicle branches scaberulous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–12 mm long.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 9.8–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 2.1–3.5 mm long; pubescent; pungent.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 9.8–15 mm long; 1.1–1.2 length of upper glume; hyaline; without keels; 3 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins prominent. Lower glume surface puberulous. Lower glume apex acuminate. Upper glume lanceolate; 8.5–12 mm long; hyaline; without keels; 5 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins prominent. Upper glume surface puberulous. Upper glume apex acuminate.
FLORETS Fertile lemma linear; subterete; 7.5–12 mm long; cartilaginous; dark brown; without keel. Lemma surface pubescent. Lemma margins flat; covering most of palea. Lemma hairs red. Lemma apex entire, or dentate; 2 -fid; with lobes 0.1–0.6 mm long; surmounted by a ring of hairs; with this appendage 0.5–1.3 mm long; awned; 1 -awned. Principal lemma awn bigeniculate; 50–60 mm long overall; with twisted column. Column of lemma awn 17–30 mm long; puberulous. Palea 4.5–6.5 mm long; 1 length of lemma; 2 -veined; without keels. Palea surface pubescent.
FLOWER Lodicules 3; 2–2.5 mm long. Anthers 3; 0.8–1.9 mm long; anther tip pubescent. Stigmas 2.
DISTRIBUTION Australasia: Australia and New Zealand.
NOTES Stipeae. Townrow 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
