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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 subnitida

HABIT Perennial; caespitose. Basal innovations intravaginal. Culms erect; 40–95 cm long; 2–4 -noded. Culm-internodes distally glabrous, or pubescent. Lateral branches lacking. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 0.2–0.6 mm long. Leaf-blades flat, or convolute; 7–26 cm long; 2–3.5 mm wide. Leaf-blade surface ribbed.

INFLORESCENCE Inflorescence a panicle; comprising 10–20 fertile spikelets.

Panicle open; elliptic; 12–20 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 27–33 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 3.5–6.5 mm long; pilose; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume primary vein eciliate, or ciliate. Lower glume apex setaceously attenuate. Upper glume lanceolate; 27–33 mm long; membranous; without keels; 5 -veined. Upper glume primary vein eciliate, or ciliate. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma lanceolate; subterete; 11–15 mm long; coriaceous; shiny; without keel; 5 -veined. Lemma midvein ciliate; hairy below. Lemma surface asperulous; rough above. Lemma margins convolute; covering most of palea; ciliate; hairy at base. Lemma apex with a membranous corona; with this appendage 0.6–1 mm long; awned; 1 -awned. Principal lemma awn bigeniculate; 110–130 mm long overall; with twisted column. Column of lemma awn pubescent. Palea 2–2.5 mm long; 0 -veined; without keels.

FLOWER Lodicules 2; 1–1.4 mm long. Anthers 3. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform; 6.5–7 mm long. Hilum linear.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Rosengurtt 1995.

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