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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 milleri

HABIT Perennial; caespitose; clumped densely. Culms erect; 30–45 cm long. Culm-internodes mid-green, or purple; distally glabrous. Leaves basal and cauline. Leaf-sheaths mostly shorter than adjacent culm internode; scaberulous; glabrous on surface. Ligule an eciliate membrane; obtuse. Leaf-blades filiform; 1–2 mm wide. Leaf-blade venation with 3–7 secondary veins. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; 3.7–6 cm long; bearing few spikelets. Primary panicle branches indistinct the panicle almost racemose.

Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels 7–12 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 9.4–10.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; 0.5–0.7 mm long; pubescent; acute. Floret callus hairs 0.5 mm long.

GLUMES Glumes persistent; similar; subequal in width; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 9.5–10.2 mm long; 1.3–1.4 length of upper glume; hyaline; purple. Lower glume apex acuminate. Upper glume lanceolate, or oblong; 7.5–7.6 mm long; 1.7 length of adjacent fertile lemma; hyaline; purple; without keels. Upper glume apex acute.

FLORETS Fertile lemma oblong; subterete; 4.4–4.6 mm long; 0.8 mm wide; membranous; without keel. Lemma surface puberulous; hairy below. Lemma margins flat; covering most of palea. Lemma hairs 0.1–0.3 mm long. Lemma apex dentate; 2 -fid; with lobes 0.2 mm long; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate; 13 mm long overall; with twisted column; limb ciliate; with 0.7–1.1 mm long hairs. Column of lemma awn 9 mm long; ciliate; with 0.7–1.1 mm long hairs. Palea lanceolate; 4 mm long; 1 length of lemma; 2 -veined; without keels. Palea surface glabrous.

FLOWER Lodicules 3. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Stipeae. Fl Bhutan 2001.

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