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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 mandavillei
HABIT Perennial; caespitose. Culms 30–65 cm long; 4–5 -noded. Leaf-sheaths glabrous on surface, or pubescent; outer margin hairy. Leaf-sheath oral hairs bearded; 0.5–1.3 mm long. Ligule an eciliate membrane; 0.5–1.5 mm long; obtuse. Leaf-blades flat, or involute; 10–35 cm long; 1–2.5 mm wide. Leaf-blade surface pubescent; densely hairy; hairy adaxially.
INFLORESCENCE Inflorescence a panicle; exserted, or embraced at base by subtending leaf.
Panicle contracted; linear; (7–)10–15(–20) cm long; 1–2.5 cm wide. Primary panicle branches bearing 3 fertile spikelets on each lower branch.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 7–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; curved; 0.5–0.7 mm long; pilose; unequally 2-toothed. Floret callus hairs 0.1–0.2 length of lemma.
GLUMES Glumes persistent; similar; exceeding apex of florets; similar to fertile lemma in texture. Lower glume lanceolate; 7–10 mm long; 0.9 length of upper glume; membranous; much thinner on margins; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 6.5–9 mm long; 1.4–1.6 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 3 -veined. Upper glume apex acuminate.
FLORETS Fertile lemma lanceolate; subterete; 4.5–5.5 mm long; membranous; without keel; 5 -veined. Lemma surface pilose. Lemma margins flat; covering most of palea. Lemma hairs 0.7–1 mm long. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate, or bigeniculate; 250–400 mm long overall; with twisted column; deciduous; limb glabrous. Column of lemma awn ciliate; with 0.5–1.5 mm long hairs. Palea 0.75 length of lemma; 2 -veined; without keels. Palea surface pilose.
FLOWER Lodicules 3; 1.1–1.3 mm long. Anthers 3; 2.5–3 mm long; anther tip penicillate. Stigmas 2. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; fusiform. Hilum linear.
DISTRIBUTION Asia-temperate: Arabia.
NOTES Stipeae. Freitag.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
