Panicum trichidiachne

HABIT Perennial. Culms decumbent; 30–60 cm long; rooting from lower nodes. Leaf-sheaths pilose; with tubercle-based hairs. Ligule a ciliate membrane. Leaf-blades lanceolate; 10–15 cm long; 14–17 mm wide. Leaf-blade surface pubescent; hairy abaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; 10–16 cm long; contracted about secondary branches.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; subacute; 1.5–1.75 mm long; falling entire.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.2 length of spikelet; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex obtuse.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 length of spikelet; membranous; 5 -veined; obtuse. Fertile lemma elliptic; dorsally compressed; 1.5 mm long; indurate; pallid; without keel. Lemma surface pubescent; hairy all along. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate. Palea surface pubescent.

DISTRIBUTION North America: Mexico. South America: Mesoamericana, Caribbean, northern South America, western South America, Brazil, and southern South America.

NOTES Paniceae. WDC.

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