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Descriptions

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

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

Nassella glabripoda

HABIT Perennial; caespitose. Basal innovations intravaginal. Culms erect; 10–55 cm long. Culm-internodes distally glabrous. Lateral branches lacking. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface; outer margin glabrous, or hairy. Leaf-sheath oral hairs lacking, or ciliate. Ligule an eciliate membrane. Collar glabrous. Leaf-blades convolute; 2–14 cm long; 0.3–0.6 mm wide. Leaf-blade surface puberulous; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; 4–14 cm long; bearing few spikelets. Panicle axis glabrous. Panicle branches glabrous, or puberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels glabrous, or puberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.5–4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief, or evident; 0.3–0.5 mm long; glabrous; acute.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 2.5–4.5 mm long; 1 length of upper glume; membranous; yellow, or purple; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 2.5–4.5 mm long; membranous; yellow, or purple; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma elliptic; subterete; 2–3 mm long; chartaceous; dark brown; without keel; 5 -veined. Lemma surface pilose. Lemma margins convolute; covering most of palea. Lemma apex with a membranous corona; with this appendage 0.2 mm long; awned; 1 -awned. Principal lemma awn geniculate, or bigeniculate; 5–8 mm long overall; with 3 mm long limb; with twisted column; deciduous. Column of lemma awn 2.5 mm long. Palea 1 mm long; 0.4–0.5 length of lemma; 0 -veined; without keels.

FLOWER Lodicules 2. Anthers 1, or 3. Staminodes absent, or present. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 1.9–2 mm long. Hilum linear; 0.66 length of caryopsis.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Torres 1997.

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