Geigeria alata
| Family: | Asteraceae |
| Full name: | Geigeria alata (DC.) Benth. & Hook.f. ex Oliv. & Hiern |
| Location: | Kyffhäuser (2416AD + 2416CB) |
| ID status: | Fairly certain |
| Afrikaans common name(s): | - |
| English common name(s): | Wing vomitdaisy |
| Synonym(s): | Cichorium alatum Hochst. & Steud. Diplostemma alatum (Hochst. & Steud.) DC. Geigeria macdougalii S.Moore - apud Rendle |
| Status: | Native |
| Description: | Annual herb, usually up to 10 cm high but in temporarily swampy sites to 30 cm high; stems usually much branched, minutely scabridulous, with continuous wings up to 3 mm wide. Leaves subopposite, sessile, lanceolate, 2–5(–8) cm long, 0.4–1.5(–2.5) cm wide, base cuneate and decurrent, margins obscurely denticulate, apex acute with a spiny point, scabridulous and glandular on both surfaces. Capitula 7–10 mm long, solitary in leaf axils and branching points, sessile; phyllaries of two kinds, the outermost distally green and foliose, to 14 mm long and 4 mm wide, at anthesis spreading, the inner ones cream, ovate, 2–8 mm long, tapering to a spiny and outcurving tip, ciliate, glandular; receptacle with membranaceous paleae to 4 mm long, 3-lobed. Florets 10–12; outer florets with tube cylindric, 2–3.5 mm long, ray 2.5 mm long, 0.6–0.8 mm wide and glandular beneath, style 2.5–3.8 mm long; inner florets with tube cylindric and rather squat, 1–2.6 mm long, lobes 1.2–1.5 mm long and pilose and glandular, anthers 1.4–1.5 mm long, style 2.2–4 mm long. Achenes ellipsoid, 0.8–1.1 mm long, densely hairy; pappus of membranaceous scales, those of the inner series awned and to 2 mm long. (from JSTOR Global Plants website / Flora of Tropical East Africa) A herb up to about 1 ft. high with a 3-winged stem; leaves of two sorts occur at each node, two with decurrent bases and one without; flower-heads about 0.167 in. long with the tips of the outer involucral bracts spreading and leafy; florets yellow; a weed of semi-desert. (from JSTOR Global Plants website / Flora of West Tropical Africa) Annual herb, usually up to 10 cm high but in temporarily swampy sites to 35 cm high; stems usually much-branched, minutely scabridulous, with continuous wings up to 3 mm wide. Leaves subopposite, sessile, lanceolate, 2–5(–8) x 0.4–1.5(–2.5) cm, base cuneate and decurrent, margins obscurely denticulate, apex acute with a spiny point, scabridulous and glandular on both surfaces. Capitula solitary in leaf-axils and branching points, sessile; involucre 7–14 mm long; phyllaries of two kinds, the outermost distally green and foliose to 14 mm long, the inner ones cream, ovate, 2–8 mm long, tapering to a spiny and outcurving tip, ciliate, glandular (on the leafless parts of the plants old capitula may appear densely clustered). Florets yellow, 10–12; outer florets with ray c. 2.5 mm long, 0.6–0.8 mm wide; inner florets 2.2–4.5 mm long. Achenes ellipsoid, 0.8–1.1 mm long, densly hairy; pappus of membranous scales, those of the inner series awned and to 2 mm long. (from JSTOR Global Plants website / Flora Somalia) Geigeria alata is a herbaceous plant. The stems are winged and reach 30 cm in length. Heads are usually solitary, buried dan terminal crown of leaves. (from www.planetefleurs.fr, translated from French by Google Translate) |
| 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 |
| Photographer: | AA Dreyer |
| Date of photograph: | 21 Dec 2006 |
| Camera make: | Canon |
| Camera model: | PowerShot A700 |
| Lens aperture: | f/4.0 |
| Shutter speed: | 1/200 s |
| ISO speed: | - |
| Content last updated: | 18 Apr 2024 |
