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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 hans-meyeri
HABIT Perennial; caespitose; clumped densely. Culms erect; 20–35 cm long; 0.5 mm diam. Culm-internodes distally glabrous. Culm-nodes glabrous. Leaves 2–4 per branch. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 3–4 mm long. Leaf-blades involute; 1 mm wide; stiff. Leaf-blade surface ribbed; scabrous; rough adaxially. Leaf-blade apex pungent.
INFLORESCENCE Inflorescence a panicle. Peduncle pubescent above; cylindrical at apex, or tipped by a glumaceous appendage.
Panicle open; linear; 3–10 cm long; bearing few spikelets.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 7–9.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; 0.3–0.5 mm long; pubescent; acute.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 7–9.5 mm long; 1 length of upper glume; hyaline; without keels; 1–3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acuminate. Upper glume lanceolate; 7–9.5 mm long; 2–3 length of adjacent fertile lemma; hyaline; without keels; 1–3 -veined. Upper glume lateral veins absent, or obscure. Upper glume apex acuminate.
FLORETS Fertile lemma elliptic; subterete; 3.5 mm long; membranous; without keel; 5 -veined. Lemma midvein pubescent. Lemma lateral veins obscure. Lemma surface glabrous; with conspicuous apical hairs. Lemma margins flat; covering most of palea; pubescent. Lemma hairs 2.4–4 mm long. Lemma apex surmounted by a ring of hairs; awned; 1 -awned. Principal lemma awn geniculate; 9–12 mm long overall; with twisted column. Column of lemma awn glabrous. Palea oblong; 1 length of lemma; chartaceous; 2 -veined; without keels.
FLOWER Lodicules 3. Anthers 3; anther tip smooth. Stigmas 2. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp. Hilum linear.
DISTRIBUTION South America: Mesoamericana and western South America.
NOTES Stipeae. Veldkamp 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
