Descripcion

Perennial herbs, caespitose, stems prostrate, 3–10 (–20) cm, branched, more densely leafy at base and more loosely in upper part, whitish-woolly. Leaves 6–8 (–25) × (2.5–)4.5–6(–10) mm, broadly obovate, attenu ate at base, apex rounded, mucronate; concolorous, whitish-woolly on both surfaces; trichomes long, eglan dular, eseptate, filiform from base to tip. Capitula many, in headlike clusters, subtended by obovate leaves. In volucre narrowly campanulate, 3–5 × 2.5–4 mm. Phyl laries 12 to 20, 4-seriate, lamina light brown at apex; outer phyllaries 2–3.8 × 1–1.5 mm, ovate, apex acute to acuminate, lanuginose; inner phyllaries 3–4.5 × 0.5–1 mm, oblong-lanceolate, apex acute or subacute, glabrous. Pistillate florets (9 to)14 to 18, corolla 2.2–3 mm. Bisexual florets 3 to 5, corolla 2.5–3 mm, 5-lobed (rarely 4- or 6-lobed), anthers 5. Achenes 0.5–1.5 mm, pilose, with clavate duplex trichomes. Pappus bristles 2.5–3 mm.

Distribucion y Habitat

Gamochaeta alpina is known from southern Chile (Freire et al., 2016) and southwestern Argentina (Cabrera, 1971; Freire & Iharle- gui, 2014). It grows in the Subantarctic dominion (Cabrera & Willink, 1973) at elevations between 700 and 2000 m.

Ejemplares de referencia

Colector N° Colect. Especie Departamento Provincia Imagen
  • Barros, E.
    		• 7370 Choapa Coquimbo
  • Bayón, N. D.
    		• 1341 Bariloche Río Negro
  • Bernasconi, P.
    		• 204 Río Negro
  • Boelcke, O.
    		• 6952 Los Lagos Neuquén
  • Boelcke, O.
    		• 10692 Minas Neuquén
  • Boelcke, O.
    		• 11059 Minas Neuquén
  • Burkart, A.
    		• 6157 Bariloche Río Negro
  • Cabrera, A. L.
    		• 5902 Bariloche Río Negro
  • Corte, A.
    		• 235 Río Negro
  • de Barba, R.
    		• 1261 Neuquén
  • de la Sota, E. R.
    		• 2179 Los Lagos Neuquén
  • Marticorena, C.
    		• 1363 Malleco Araucanía
  • Montero, O.
    		• 8717 Cautín Araucanía
  • Neumeyer, J. J.
    		• 461 Río Negro
  • Neumeyer, J. J.
    		• 477 Río Negro
  • Neumeyer, J. J.
    		• 509 Río Negro
  • Ptacek, J.
    		• 64 Huiliches Neuquén
  • Ricardi, C.
    		• 5218 Biobío Biobío
  • sin colector
    		• -1 251 Aconcagua Valparaíso
  • sin colector
    		• 994 (SI 135454) -
  • Teillier, S.
    		• 4906 Choapa Coquimbo

    Nombre Vulgar y Usos

    Tipo y Observaciones

    Material Tipo: Basónimo: Laennecia alpina Poepp.
    Observaciones: Recognition. The cluster analysis (Fig. 3A) placed Gamochaeta alpina with G. nivalis and G. serpyllifolia. These species are caespitose with prostrate stems, con colorous leaves, and capitula arranged in headlike clus ters. Gamochaeta alpina mainly differs by its achene trichomes that are clavate (vs. globose or subclavate in G. serpyllifolia and G. nivalis).

    A. Planta. B. Capítulo. C. Corola de la flor del margen. D. Flor del centro.