Flora del Cono Sur · Ficha del taxón
Annual herbs, stems solitary (2 or 3), prostrate, 1–5 cm, simple, densely and uniformly leafy, arachnoid- lanuginose to whitish-woolly. Leaves 5–15 × 1–2 mm, obovate, attenuate at base, apex acute to obtuse, mu cronate; concolorous, arachnoid to whitish-woolly on both surfaces; trichomes long, eglandular, eseptate, with basal cells expanded. Capitula few, 2 or 3(6), in head like clusters, surrounded by linear leaves. Involucre narrowly campanulate, 3–4 × ca. 2 mm. Phyllaries ca. 20, 4-seriate, lamina light brown at apex; outer phyllar ies 2–2.7 × 1.1–1.5 mm, ovate, apex acute, lanuginose; inner phyllaries 3–4 × 0.6–1 mm, oblong-lanceolate, apex acute, glabrous. Pistillate florets 32 to 41, corolla ca. 2 mm. Bisexual florets 2 to 4, corolla ca. 2 mm, 5-lobed, anthers 5. Achenes 0.7–0.8 mm, pilose, with short, globose duplex trichomes. Pappus bristles ca. 2 mm.
Basónimo: Gnaphalium oliganthum Phil.
Gamochaeta oligantha occurs in southern Argentina (Cabrera, 1971; Freire & Iharlegui, 2014) and northern, central, and southern Chile (Freire et al., 2016) in the Andean-Patagonian dominion (Cabrera & Willink, 1973), at elevations be tween 30 and 980 m.
El nombre aceptado actualmente para la Flora del Cono Sur es Gamochaeta oligantha .
Referencia bibliográfica:
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| (Phil. ex Reiche) Cabrera | 1961 | Bol. Soc. Argent. Bot. 9 · 374 |
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| Phil. ex Reiche | 1903 | Anales Univ. Chile 112 · 117 |
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| Phil. | 1864 | Linnaea 33 · 167 |
Gamochaeta monticola
Sinónimo registrado de Gamochaeta oligantha .
Basónimo: Gnaphalium monticola Phil. ex Reiche
Gnaphalium monticola
Sinónimo registrado de Gamochaeta oligantha .
[Chile]. Cordilleras de Santiago, Las Arañas, Ene 1861, C. L. Landbeck 60 (holotipo, SGO-064517!; isotipo, LP 001933!).
Gnaphalium oliganthum
Sinónimo registrado de Gamochaeta oligantha .
Chile. [Prov. Aconcagua] Catemu, Sep. 1860, Philippi s.n. (holotype, SGO-64427!*).
Freire, S. E., Grossi, M. A., Bayón, N. D., Monti, C., Iharlegui, L. & Migoya, M. A. (2024). Taxonomic revision and morphometric analysis of Gamochaeta (Asteraceae, Gnaphalieae). Annals of the Missouri botanical garden, 109, 244-320.
Freire, S. E., Salomón, L., Bayón, N. D., Baeza, C. M., Muñoz-Schick, M. & Migoya, M. A. (2016). Taxonomic revision of the genus Gamochaeta Wedd. (Gnaphalieae, Asteraceae) in Chile. Gayana, instituto central de biología. Botánica., 73(2), 292-345.
Freire, S. E. & Iharlegui, L. (1997). Sinopsis preliminar del género Gamochaeta (Asteraceae, Gnaphalieae). Boletín de la Sociedad Argentina de Botánica, 33, 23-35.
Sin datos de conservación registrados en Flora Vascular Argentina.
Fuente: Flora Vascular Argentina.
Recognition. The cluster analysis (Fig. 3A) shows that Gamochaeta oligantha is nested within group A. Gamochaeta oligantha is distinguished by its small plant size with usually solitary stems, and few sessile capitula arranged in headlike clusters.