Coryphantha neglecta L Bremer 1979

Plants solitary to clumping. Stems globose, depressed api-cally and woolly, dull green, to 6 cm (2.4 in) high and 7 cm (2.8 in) in diameter. Tubercles conical, rhomboid basally, slightly keeled, firm, with faint shallow grooves. Central spine one, sometimes absent, thin, awl shaped, stiff, straight, expanded basally, erect, gray, 13-15 mm (0.5-0.6 in) long. Radial spines 15-17, needle-like, stiff, straight, spreading, black or yellowish, becoming gray with age, 10-20 mm (0.40.8 in) long. Flowers funnelform, pale yellow, 4-5 cm (1.6-2 in) in diameter. Fruits oblong, juicy, gray-green, to 23 mm (0.9 in) long. Distribution: Monclova, Coahuila, to Monterrey, Nuevo León, Mexico.

Coryphantha nickelsiae (K. Brandegee) Britton & Rose 1923

nickels's coryphantha Mammillaria nickelsiae K. Brandegee 1900

Plants solitary to many-stemmed, forming low mats with the stems nearly hidden by overlapping spines. Stems globose, glaucous dark green, to 11 cm (4.3 in) high, 5-7 cm (2-2.8 in) in diameter. Tubercles bluntly conical, soft, to 10 mm (0.4 in) long, sometimes with glands among the spines. Central spine usually one, sometimes absent, erect, straight or slightly curved, 11-16 mm (0.4-0.6 in) long. Radial spines 13-20, crowded, white, 10-23 mm (0.4-0.9 in) long. Flowers pale yellow, 4.5-5 cm (1.8-2 in) in diameter. Fruits gray-green or bright green, to 23 mm (0.9 in) long. Distribution: south Texas, and Nuevo León, Tamaulipas, and Coahuila, Mexico.

Coryphantha nickelsiae

Coryphantha nickelsiae

Coryphantha octacantha (A. P. de Candolle) Britton & Rose 1923

Mammillaria octacantha A. P. de Candolle 1828 Mammillaria macrothele Martius ex Pfeiffer 1837, Coryphantha macrothele (Martius ex Pfeiffer) Kümmler 1998 Mammillaria clava Pfeiffer 1840, Coryphantha clava (Pfeiffer) Lemaire 1868

Plants solitary or branching basally to form clumps. Stems oblong to short cylindrical, olive green, to 30 cm (12 in) or more high and 10 cm (3.9 in) in diameter. Tubercles loosely arranged, conical, four-angled, to 30 mm (1.2 in) long, axils with white wool and one or two red glands. Central spines 1-2, stout, straight, erect, brownish, to 20 mm (0.8 in) long. Radial spines 7-8, awl shaped, thin, rigid, straight, yellowish with dark tips, to 15 mm (0.6 in) long. Flowers lemon yellow, 4-6 cm (1.6-2.4 in) in diameter. Fruits oblong, to 25 mm (1 in) long. Distribution: Hidalgo and Queretaro, Mexico.

Coryphantha odorata Boedeker 1930 Neolloydia odorata (Boedeker) Backeberg 1942, Cumarinia odorata (Boedeker) Buxbaum 1951

Plants commonly forming irregular clusters. Stems globose to short cylindrical, dark green, to 3 cm (1.2 in) in diameter. Tubercles blunt tipped, cylindrical, soft, flaccid, to 10 mm (0.4 in) long, axils naked. Central spines 1-6, strongly hooked, erect, stout, yellowish to reddish to brownish, to 25 mm (1 in) long. Radial spines 7-9, weakly flattened against the stem surface or projecting, straight, white, 8-10 mm (0.3-0.4 in) long. Flowers narrowly funnelform, self-pollinating, white or cream, 1.5-2 cm (0.6-0.8 in) long, 0.8-1 cm (0.3-0.4 in) in diameter. Fruits narrowly cylindrical, dark green or maroon, 15-20 mm (0.6-0.8 in) long. Distribution: Tamaulipas and San Luis Potosi, Mexico.

Coryphantha ottonis (Pfeiffer) Lemaire 1868 Mammillaria ottonis Pfeiffer 1838

Mammillaria exsudans Zuccarini 1837, Coryphantha exsudans (Zucca-

rini) Lemaire ex Förster 1886 Mammillaria asterias Cels 1850, Coryphantha asterias (Cels)

Boedeker ex A. Berger 1929 Mammillaria bussleri Mündt 1902, Coryphantha bussleri (Mündt) Scheinvar 1981

Plants solitary, globose, glossy dark green or gray green, to 12 cm (4.7 in) high, 4-7 cm (1.6-2.8 in) in diameter. Stems succulent. Tubercles bluntly conical, soft, to 15 mm (0.6 in)

Coryphantha odorata long, axils with dense wool and glands. Central spines 1-4, usually hooked on young plants, straight on older ones, rigid, gray, yellowish, or reddish, 15-20 mm (0.6-0.8 in) long. Radial spines 8-10, yellow to reddish, to 12 mm (0.5 in) long. Flowers white, pale yellow, pale pink, or bright rose pink, 3-6 cm (1.2-2.4 in) long, 4-6.5 cm (1.6-2.6 in) in diameter. Distribution: widespread in Zacatecas, San Luis Potosí, Aguas-calientes, Guanajuato, Hidalgo, Jalisco, and México, Mexico.

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