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Info
Subfamily: Chloridoideae
Genus etymology: Sporobolus = "seed thrower" referring to the seed being ejected from the pericarp
Species etymology: domingensis = From the Dominican Republic
Photosynthetic type: C4 (warm season)
Nativity: naturalized - accidental
First recorded in Hawaiʻi: 1992
Map
Inflorescence
Plant
Habit
Spikelets
Landscape
Description
Plants perennial; cespitose, not rhizomatous. Culms 20–100 cm. Sheaths rounded below, distal margins and apices hairy, hairs to 3 mm; ligules 0.2–1.2 mm; blades 5– 20 cm long, 3–8 mm wide, flat to loosely involute, glabrous abaxially, scabridulous adaxially, margins scabridulous. Panicles 10–25(35) cm long, 1–5 cm wide, usually somewhat contracted, sometimes spikelike, often interrupted below; primary branches 0.7–7 cm, appressed or spreading to 30° from the rachis, spikelet-bearing to the base; secondary branches appressed; pedicels 0.2–1.4 mm, appressed. Spikelets 1.6–2 mm, yellowish-green to grayish. Glumes unequal, linear-lanceolate to ovate, membranous; lower glumes 0.5–1.1 mm, usually without veins; upper glumes 1.1–2 mm, subequal to the lemmas; lemmas 1.1–2 mm, ovate, membranous, glabrous (occasionally minutely pubescent), acute; paleas 1–2 mm, ovate, membranous; anthers 2 or 3, 0.5–1 mm, yellowish or purplish. Fruits 0.7–1.1 mm, ellipsoid, laterally flattened, light brownish. 2n = unknown.
(Description source: Barkworth, M.E., Capels, K.M., Long, S. & Piep, M.B. (eds.) 2003. Flora of North America, north of Mexico. Volume 25. Magnoliophyta: Commelinidae (in part): Poaceae, Part 2. Oxford University Press, New York. 783 pp. http://floranorthamerica.org/Sporobolus_domingensis )