Autor: Ritter • ETYMOLOGY Genus native of the province of Yungas, La Paz, Bolivia, where it was first found. • DESCRIPTION Monotypic genus of shrubby to treelike plants, branched, columnar, 4-5 m in height, ribs 6-10, little marked, straight, weakly tuberculate and transversely grooved over the areoles. 4-12 spines, centrals and radiais not differentiated, short and…
Autor: R. Kiesling & J. Piltz • ETYMOLOGY Genus native of Yavi, department of Jujuy province in Argentina, near the Bolivian border. • DESCRIPTION Monotypic genus of dwarf plants (3 cm. in diam.), geophytic, solitary (caespitose in cultivation when grafted), usually subterranean with a long napiform root, the aerial part of the stem depressed with the…
Autor: Porter • ETYMOLOGY Genus honouring Dr Ira Loren Wiggins (1899-1987), North American botanist and specialist of the flora of Baja California, Mexico (see portrait above, cCSSA). • DESCRIPTION A genus of low-growing plants, usually solitary, globose or depressed with a central pseudocephalium formed by a cluster of trichomes that arise from the flowering areoles. Ribs…
Autor: Werdermann • ETYMOLOGY Genus honouring Wilhem Weingart (1856-1936), German botanist and cactus specialist. • DESCRIPTION A genus of globose plants with the apex flattened, becoming sometimes elongated to shortly columnar (up to 30 cm high), usually solitary but also caespitose, with more or less napiform roots. Ribs strongly tuberculate, tubercles distinctly spiralled in Sulcorebutia; areoles…
Autor: Britton & Rose • ETYMOLOGY ≪Weber’s cereus≫, genus honouring Frederic Albert Constantin Weber (1830-1903), French botanist who described several species during the French military expedition in Mexico in which he took part from 1864 until 1867. • DESCRIPTION A genus of epiphytic or epilithic plants, reaching up to 2 m long; stems first flattened and…