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Published In: De Fructibus et Seminibus Plantarum. . . . 1: 7. 1788. (Fruct. Sem. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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47. Eleusine Gaertn. (goose grass)

Plants annual or perennial, forming tufts or small clumps. Flowering stems spreading to erect, sometimes ascending from spreading bases, rarely rooting at the lower nodes, slightly flattened, glabrous. Leaf sheaths keeled, glabrous or more commonly sparsely long‑hairy along the margins near the tip, the ligule a short membrane with uneven or irregularly cut margins. Leaf blades flat or folded, glabrous or roughened along the margins, sometimes hairy on the upper surface near the base. Inflorescences consisting of 1–8 spikes, these mostly palmate in a single whorl at the tip of the main axis (sometimes 1 or 2 spikes below the tip of the axis), loosely ascending to spreading or slightly arched downward, the whole inflorescence wider than long. Spikes with numerous, dense, sessile spikelets positioned in 2 rows on 1 side of the flattened axis, this not prolonged past the terminal spikelet. Spikelets strongly flattened laterally, with 2–12 florets, disarticulating above the glumes. Glumes unequal in size and shape, the lower glume shorter, narrower, and 1‑nerved, the upper glume longer, broader and 3‑ or 5‑nerved, both bluntly to sharply pointed at the tip, keeled and with a green stripe along the midnerve, awnless, glabrous or roughened along the midnerve. Lemmas lanceolate to ovate, sharply pointed at the tip, 3–9‑nerved, keeled and with a green stripe along the midnerve, awnless, glabrous (including the base). Paleas shorter than the lemmas, 2‑nerved, with 2 minute teeth at the tip. Stamens 3, the anthers 0.3–0.8 mm long. Fruits 1.0–1.5 mm long, the membranous outer coat shed easily when moistened. Seeds broadly oblong‑ovate to nearly circular in outline, flattened to slightly concave on 1 side, rounded to somewhat angled on the back, the surface with cross‑wrinkles. About 9 species, nearly worldwide in tropical and warm‑temperate regions, but most diverse in Africa.

 

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1 Spikes (2–)3–8 per inflorescence, 3.5–12.0 cm long, 3–5 mm wide; spikelets with 2–7 florets; fruits dark reddish brown 1 Eleusine indica subsp. indica
+ Spikes 1–3 per inflorescence, 1.5–4.5 cm long, 7–15 mm wide; spikelets with 5–12 florets; fruits black 2 Eleusine tristachya
 
 
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