Cinna bolanderi

HABIT Perennial. Rhizomes short. Culms 8–200 cm long; 1.8–3 mm diam.; 4–8 -noded. Ligule an eciliate membrane; 3.5–7 mm long. Leaf-blades 15–25 cm long; 2–19 mm wide. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or ovate; dense, or loose; 7.5–43 cm long; 3–18 cm wide. Primary panicle branches ascending, or spreading; whorled at most nodes.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets elliptic; laterally compressed; (3.6–)4–5.5(–6.5) mm long; falling entire.

GLUMES Glumes similar; reaching apex of florets, or exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; (3.2–)3.5–5.2(–6) mm long; 0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume lanceolate; (3.6–)4–5.5(–6.3) mm long; 1–1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1–3 -veined. Upper glume lateral veins absent, or distinct. Upper glume surface asperulous. Upper glume apex acute.

FLORETS Fertile lemma ovate; (2.7–)3.2–4.6 mm long; membranous; keeled; 5 -veined. Lemma apex acute; mucronate, or awned; 1 -awned. Principal lemma awn subapical; 0.2–1.5 mm long overall; not or scarcely exserted from spikelet. Palea 2.7–3.8 mm long; 2 -veined; 2-keeled. Palea keels approximate. Rhachilla extension 0.4–0.9 mm long.

FLOWER Anthers 2; 1.2–2.6 mm long.

FRUIT Caryopsis with adherent pericarp; oblong; 2–2.9 mm long. Endosperm liquid.

DISTRIBUTION North America: southwest USA.

NOTES Aveneae. Brandenberg 2000.

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