Eragrostis annulata
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Image 1
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24 Sep 2008
Image 2
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27 Sep 2008
Image 3
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05 Apr 2009
Image 4
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29 Apr 2011
| Family: | Poaceae |
| Full name: | Eragrostis annulata Rendle ex Scott-Elliot |
| ID status: | Fairly certain |
| Afrikaans common name(s): | Blougras, Soutgras, Soetgras, Ringwindhalmgras, Blousoetgras |
| English common name(s): | Ringed lovegrass, Ring windgrass |
| Synonym(s): | Eragrostis ramosa Hack. |
| Status: | Native |
| Description: | Loosely caespitose annual; culms up to 35 cm tall, ascending, branched or unbranched, glabrous at the nodes, with a glandular ring below the nodes; leaf sheaths thinly pilose, the slender hairs mixed with shorter, gland-tipped hairs; ligule a line of hairs; leaf laminas 2–12 cm × 1–5 mm, linear, flat, thinly pilose, the slender hairs mixed with shorter gland-tipped hairs, with scattered crateriform glands along the margins and a line of glandular pits along the midnerve below.Panicle 4–20 cm long, ovate, fairly dense to open, stiffly branched, the spikelets evenly distributed on pedicels 1–3 mm long, these with a distinct annular gland, the primary branches not in whorls, terminating in a fertile spikelet, glabrous in the axils.Spikelets 3–9(15) × 1.3–2 mm, narrowly oblong or sometimes linear, laterally compressed, 6–16(40)-flowered, the lemmas disarticulating from below upwards, the rhachilla persistent; glumes subequal, 0.7–1.1 mm long, reaching to about the middle of the adjacent lemmas, keeled, narrowly ovate in profile, eglandular, subacute at the apex; lemmas 1.5–1.8 mm long, keeled, ovate to broadly ovate in profile, chartaceous with distinct lateral nerves, diverging from the rhachilla at less than 45°, those in opposite rows scarcely imbricate, the rhachilla ± visible between them, yellowish-green to leaden-grey or purplish, eglandular, glabrous, obtuse at the apex; palea persistent, glabrous on the flanks, the keels slender, wingless, scaberulous to scabrid; anthers 3, 0.6–1 mm long.Caryopsis 0.4–0.5 mm long, ± square in profile with a shallow to deep depression along the back. (from JSTOR Global Plants website / Flora Zambesiaca) HABIT Annual; caespitose. Glands annular and capitate. Culms geniculately ascending; 14–35 cm long. Culm-internodes glandular. Leaf-sheaths glandular; pilose; with tubercle-based hairs. Ligule a fringe of hairs. Leaf-blades 5–10 cm long; 2–3 mm wide; glandular. Leaf-blade surface pilose; with tubercle-based hairs. INFLORESCENCE Inflorescence a panicle. Panicle open; oblong, or ovate; dense; 4–12 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels glandular; ciliate. FERTILE SPIKELETS Spikelets comprising 3–9 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5–15 mm long; 1.5–2.3 mm wide; breaking up at maturity; rhachilla persistent; retaining paleas; fragile above; with the distal florets disarticulating separately. Rhachilla internodes eventually visible between lemmas. GLUMES Glumes deciduous; similar; shorter than spikelet. Lower glume lanceolate; 0.7 mm long; 0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.2 mm long; 0.66 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute. FLORETS Fertile lemma oblong, or ovate; 1.8 mm long; membranous; pallid, or purple; keeled; 3 -veined. Lemma lateral veins prominent. Lemma apex obtuse. Palea keels eciliate. Apical sterile florets resembling fertile though underdeveloped. FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 0.6–1 mm long. FRUIT Caryopsis with adherent pericarp; oblong, or ovoid. Embryo 0.75 length of caryopsis. (from RBG Kew: GrassBase - The Online World Grass Flora) |
| Link(s) |
African Plant Database
JSTOR Plant Science Kew Herbarium Catalogue BGBM Berlin-Dahlem - Virtual Herbarium Züricher Herbarien iNaturalist (Namibia / Alex Dreyer) iNaturalist (Namibia) iNaturalist (southern Africa) Flora of Zimbabwe Fleurs de notre Terre - Galerie Namibie Tree Atlas of Namibia |
| Content last updated: | 18 Apr 2024 |
