Tatianyx arnacites

HABIT Perennial; caespitose. Butt sheaths scarious; dark brown; pubescent, or woolly. Culms erect; 24–56 cm long. Leaves mostly basal. Ligule a fringe of hairs. Leaf-blades 6–13 cm long; 1–2 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 3.5–9 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; tip oblique.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 3.5–4 mm long; falling entire. Spikelet callus oblong; 0.5 mm long; pilose; base obtuse; attached obliquely.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.75 length of spikelet; membranous; without keels; 5 -veined. Lower glume surface villous. Lower glume apex acuminate. Upper glume ovate; membranous; without keels; 9 -veined. Upper glume surface villous. Upper glume apex acute.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 9 -veined; villous; hairy in the middle; bearing hairs 1–1.5 mm long; obtuse. Fertile lemma ovate; 3–3.5 mm long; coriaceous; without keel; 5 -veined. Lemma margins involute. Lemma apex obtuse. Palea indurate.

FRUIT Hilum linear.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. WDC.

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