Streptochaeta angustifolia

HABIT Perennial; caespitose. Rootstock evident. Cataphylls evident. Culms erect; 40–70 cm long; 2–2.5 mm diam. Culm-internodes hollow; distally with pubescent line. Culm-nodes pubescent. Lateral branches lacking, or sparse. Leaves cauline; 4–8 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule a fringe of hairs. Leaf-blades lanceolate; 12–15 cm long; 13–17 mm wide. Leaf-blade surface scaberulous; rough adaxially; pilose; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle 10–13 cm long.

Racemes 1; single; erect; paucilateral; 8–11 cm long; bearing 6–9 fertile spikelets on each. Rhachis angular; pubescent on surface.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.7 mm long; ciliate.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 12–14 mm long; falling entire.

GLUMES Glumes several; 5 empty glumes; whorled; similar. Lower glume oblong; 2–3 mm long.

FLORETS Fertile lemma lanceolate; 10–14 mm long; coriaceous; without keel; 12 -veined. Lemma apex attenuate; awned; 1 -awned. Principal lemma awn coiled; flat below; 30–50 mm long overall. Palea present; reflexed at apex; tightly convolute around flower; 8.5–10.5 mm long; coriaceous; 8–9 -veined; without keels. Palea apex divided to base; acuminate.

FLOWER Lodicules 3; lanceolate; 12–14.5 mm long; coriaceous; veined (12–15 veins); acute. Anthers 6; 5.4 mm long. Filaments united in a tube. Stigmas 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Streptochaeteae. Soderstrom.

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