Acanthocereus horridus* Britton & Rose 1920 Plants shrubby, much branched, semierect, stout. Stems three-angled and winglike, dark green, to 10 cm (3.9 in) wide, with undulating margins. Areoles large, 2.5–6 cm (1–2.4 in) apart. Central spines 1-2, stout, brownish, becoming gray, to 5 cm (2 in) long. Radial spines 1-6, short, conical, brown or…
Acanthocereus colombianus – Britton & Rose 1920 Plants large shrubs, erect to arching, to 3 m (9.8 ft) high. Stems strongly three- or four-winged, to 9 cm (3.5 in) thick, with acute, deeply wavy margins. Areoles large, to 5 cm (2 in) apart. Central spines 1-2, very stout, to 55 mm (2.2 in) long….
Acanthocereus baxaniensis (Karw. ex Pfeiffer) Borg 1937 Cereus baxaniensis Karwinsky ex Pfeiffer 1837 Plants shrubby, 40-60 cm (16-24 in) high. Stems short, arising basally, gray-green, erect, producing new buds from the tips of the older stems. Ribs 5-7, thin, to 1.5 cm (0.6 in) high. Areoles gray, to 3.5 cm (1.4 in) apart. Central…
Acanthocephala haselbergii* (Haage ex Rümpler) Guiggi 2012 – Parodia haselbergii (F. Haage ex Rumpler) F. H. Brandt 1982 – Echinocactus haselbergii F. Haage ex Rumpler 1885, – Malacocarpus haselbergii (F. Haage ex Rumpler) Britton & Rose 1922, – Notocactus haselbergii (F. Haage ex Rumpler) A. Berger 1929, – Brasilicactus haselbergii (F. Haage ex Rumpler) Backeberg…
Acanthocephala graessneri – (K.Schum.) Guiggi 2012 – Echinocactus graessneri K. Schumann 1903, – Malacocarpus graessneri (K. Schumann) Britton & Rose 1922, – Notocactus graessneri (K. Schumann) A. Berger 1929, – Brasilicactus graessneri (K. Schumann) Backeberg 1942, – Parodia graessneri (K. Schumann) F. H. Brandt 1982, – Parodia haselbergii subsp. graessneri (K. Schumann) Hofacker & P….