Nassella juergensii

HABIT Perennial; caespitose. Basal innovations extravaginal. Culms 30–50 cm long. Ligule an eciliate membrane. Leaf-blades flat, or convolute; 1–2 mm wide. Leaf-blade surface ribbed.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or elliptic; 7–20 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 7.5–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1–2 mm long; pilose; acute.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 7.5–12 mm long; 1.2 length of upper glume; membranous; without keels; 3–5 -veined. Lower glume apex acuminate. Upper glume lanceolate; 6.2–10 mm long; membranous; without keels; 3–5 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 4.5–6.7 mm long; coriaceous; without keel; 5 -veined. Lemma surface tuberculate; rough above. Lemma margins convolute; covering most of palea. Lemma apex with a membranous corona and surmounted by a ring of hairs; with this appendage 0.5–0.8 mm long; awned; 1 -awned. Principal lemma awn bigeniculate; 25–45 mm long overall; with a straight or slightly twisted column. Palea 0.9 mm long; 0 -veined; without keels.

FLOWER Anthers 3. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform; 2.8 mm long. Hilum linear.

DISTRIBUTION South America: Brazil and southern South America.

NOTES Stipeae. FL Entre Rios 1995.

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