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.

Stipa lanata

HABIT Perennial; caespitose. Butt sheaths pilose, or woolly. Culms 45 cm long; 1–2 mm diam.; 1–2 -noded. Culm-internodes distally pubescent. Culm-nodes pubescent. Lateral branches lacking. Leaf-sheaths inflated; longer than adjacent culm internode; glabrous on surface to pubescent; outer margin hairy. Leaf-sheath oral hairs woolly. Ligule a ciliolate membrane; 0.4–1.5 mm long. Leaf-blades flat, or involute; 20 cm long; 1.5–4 mm wide. Leaf-blade surface pubescent, or woolly; densely hairy. Leaf-blade apex hardened.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle contracted; linear; 10–15 cm long; bearing few spikelets. Primary panicle branches 1–4 cm long. Panicle axis pubescent. Panicle branches pubescent, or pilose.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels angular; 4–15 mm long; pubescent, or ciliate.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 19–26 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 3 mm long; pilose; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 19–26 mm long; 1.4 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface smooth. Lower glume apex acuminate. Upper glume lanceolate; 14–19 mm long; membranous; without keels; 5 -veined. Upper glume surface smooth. Upper glume apex acuminate.

FLORETS Fertile lemma oblanceolate; subterete; 6.5–8 mm long; cartilaginous; dark brown; shiny; without keel; 5 -veined. Lemma surface glabrous. Lemma margins flat; exposing palea. Lemma apex scabrous; surmounted by a ring of hairs; with this appendage 1.5 mm long; awned; 1 -awned. Principal lemma awn bigeniculate; 65–80 mm long overall; with twisted column. Middle segment of lemma awn 12–15 mm long. Column of lemma awn 10–15 mm long; pubescent; with 0.3 mm long hairs. Palea 1 length of lemma; 2 -veined; without keels.

FLOWER Lodicules 2; 0.5–1 mm long. Anthers 3; anther tip smooth. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; 4 mm long. Embryo 0.33 length of caryopsis. Hilum linear; 0.85 length of caryopsis.

DISTRIBUTION Australasia: Australia.

NOTES Stipeae. Vickery etc 1994.

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