Isachne goiasensis

HABIT Perennial. Culms decumbent, or rambling; 100–300 cm long; wiry, or woody; rooting from lower nodes. Culm-internodes scaberulous. Lateral branches ample. Leaf-sheaths outer margin glabrous, or hairy. Ligule a fringe of hairs. Leaf-blades lanceolate; 7–18 cm long; 7–13 mm wide. Leaf-blade surface scabrous; glabrous. Leaf-blade apex acute, or acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; 16–30 cm long. Primary panicle branches ascending, or spreading. Panicle branches stiff, or flexible.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1.5–2 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume orbicular; 0.75 length of spikelet; membranous; without keels. Lower glume surface puberulous; hairy at apex. Lower glume apex obtuse. Upper glume orbicular; 0.66 length of spikelet; membranous; without keels. Upper glume surface glabrous. Upper glume apex obtuse.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; glabrous; obtuse. Fertile lemma orbicular; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Isachneae. Renvoize 2000.

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