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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 neaei

HABIT Perennial. Rhizomes elongated. Stolons present. Butt sheaths pubescent. Culms erect, or geniculately ascending; 30–150 cm long. Culm-internodes distally pubescent. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1–5 mm long. Leaf-blades deciduous at the ligule; conduplicate, or convolute; 10–32 cm long; 0.5–2 mm wide; stiff. Leaf-blade surface pilose; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; nodding; 10–20 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 15–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 1–2 mm long; pubescent; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1.1–1.2 length of upper glume; hyaline; mid-green, or purple; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 11–21 mm long; 2–3 length of adjacent fertile lemma; hyaline; mid-green, or purple; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 7–13 mm long; coriaceous; without keel; 5 -veined. Lemma surface pilose; hairy below. Lemma margins convolute; covering most of palea. Lemma apex attenuate; awned; 1 -awned. Principal lemma awn curved; 85–140 mm long overall; with 65–110 mm long limb; with a straight or slightly twisted column; limb plumose; with 2–10 mm long hairs. Column of lemma awn 14–40 mm long; glabrous. Palea 4–7.5 mm long; 1 length of lemma; 2 -veined; without keels. Palea surface pubescent.

FLOWER Lodicules 3. Anthers 3; 4–7 mm long; anther tip penicillate. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform; 7–8 mm long; dark brown. Hilum linear; 1 length of caryopsis.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Torres 1994.

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