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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 hunzikeri

HABIT Perennial; caespitose. Basal innovations intravaginal. Culms erect; 50 cm long; 2–3 -noded. Culm-internodes terete; scaberulous. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 5–7 mm long; scaberulous on abaxial surface; entire, or lacerate; acute. Leaf-blades filiform; convolute; 4–30 cm long; 0.3–0.5 mm wide. Leaf-blade surface ribbed; scaberulous; rough abaxially; puberulous; densely hairy; hairy adaxially.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle open; linear; 10–20 cm long. Primary panicle branches 2 -nate. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 8.5–11.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; 0.2–0.3 mm long; pilose; obtuse.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 5.5–11.5 mm long; 1.2 length of upper glume; membranous; without keels; 3–5 -veined. Lower glume primary vein scaberulous. Lower glume apex setaceously attenuate. Upper glume lanceolate; 7–10 mm long; membranous; without keels; 3–5 -veined. Upper glume primary vein scaberulous. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma oblong; laterally compressed; gibbous; 2.3–3 mm long; coriaceous; without keel; 5 -veined. Lemma surface papillose. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; with this appendage 0.25 mm long; awned; 1 -awned. Principal lemma awn eccentric; bigeniculate; conically expanded at base; 53–72 mm long overall; with a straight or slightly twisted column. Palea 0.8–1 mm long; 0 -veined; without keels.

FLOWER Lodicules 2; 0.75 mm long. Anthers 3. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; obovoid; 2 mm long; dark brown. Hilum linear; 0.66 length of caryopsis.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Caro 1995.

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