Panicum decolorans

HABIT Annual; culms solitary, or caespitose. Culms 30–60 cm long. Culm-internodes distally pilose. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a ciliolate membrane; 1 mm long. Leaf-blades 8–15 cm long; 7–10 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 10–18 cm long. Primary panicle branches ascending.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 4.5–6 mm long; falling entire.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 2–2.5 mm long; 0.4–0.5 length of spikelet; membranous; without keels. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels. Upper glume apex acute.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; acute. Palea of lower sterile floret 0.25 length of lemma. Fertile lemma elliptic; dorsally compressed; 2.3–3.5 mm long; 1.5 mm wide; indurate; pallid; shiny; without keel. Lemma margins involute. Palea involute; indurate.

DISTRIBUTION North America: Mexico.

NOTES Paniceae. Fl Nov Gal 1994.

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