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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Stipa pubinodis

HABIT Perennial; short-lived; culms solitary, or caespitose. Rhizomes short. Culms 60–110 cm long; 3–5 -noded. Leaf-sheaths puberulous; outer margin glabrous, or hairy. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1.5–2 mm long; obtuse. Leaf-blades filiform; convolute; 15–50 cm long; 1–2.5 mm wide; stiff; dark green. Leaf-blade surface ribbed; smooth; pubescent; densely hairy; hairy adaxially. Leaf-blade apex hardened.

INFLORESCENCE Inflorescence a panicle. Peduncle pubescent above.

Panicle open; 15–26 cm long. Primary panicle branches 6–10 -nate; 3–6 cm long; bearing 3–4 fertile spikelets on each lower branch. Panicle branches pubescent in axils.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 3–20 mm long; scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 20–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 3.5–4.6 mm long; pubescent; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 20–25 mm long; 1.2 length of upper glume; membranous; much thinner above; without keels; 3 -veined. Lower glume surface puberulous. Lower glume apex acuminate. Upper glume lanceolate; 16–21 mm long; membranous; much thinner above; without keels; 5 -veined. Upper glume surface puberulous. Upper glume apex acuminate.

FLORETS Fertile lemma linear; subterete; 11–13 mm long; coriaceous; dark brown; without keel. Lemma surface tuberculate; rough above; pubescent. Lemma margins convolute; covering most of palea. Lemma hairs tawny. Lemma apex emarginate; awned; 1 -awned. Principal lemma awn bigeniculate; 65–90 mm long overall; with twisted column. Column of lemma awn 35–54 mm long; puberulous. Palea 7.2–8 mm long; 1 length of lemma; coriaceous; 2 -veined; without keels. Palea surface glabrous.

FLOWER Lodicules 3; 3 mm long. Anthers 3; 5.3–6.6 mm long; yellow; anther tip penicillate. Stigmas 2.

DISTRIBUTION Australasia: Australia.

NOTES Stipeae. Townrow 1994.

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