Coryphantha reduncispina Boedeker 1933

Plants solitary, globose to slightly elongated, to 10 cm (3.9 in) in diameter, densely covered by spines. Tubercles conical, to 10 mm (0.4 in) long, axils somewhat woolly, without glands. Central spines 2-3, awl shaped, horny, slightly curved downward, gray to yellowish, with dark tips, 15-25 mm (0.6-1 in) long. Radial spines 15-20, needle-like, rigid, horizontal, white or yellowish, 10-12 mm (0.4-0.5 in) long. Flowers pure yellow, 4-5 cm (1.6-2 in) in diameter. Distribution: Oaxaca, Mexico.

Coryphantha retusa (Pfeiffer) Britton 8cRose 1923 Mammillaria retusa Pfeiffer 1837

Plants solitary, flattened globose to short cylindrical with very woolly stem tips, dull green, 3-7 cm (1.2-2.8 in) high, 5-10 cm (2-3.9 in) in diameter. Tubercles unequally swollen, to 8 mm (0.3 in) long, axils and furrows woolly at first, later naked. Central spines absent. Radial spines 6-12, all but the upper ones awl shaped, flattened, pectinate, whitish yellow, becoming gray with age, 9-20 mm (0.4-0.8 in) long. Flowers bell shaped, yellow, 3.5-5 cm (1.4-2 in) long, 3.8-4.7 cm (1.5-1.9 in) in diameter. Fruits ellipsoidal, green, to 30 mm (1.2 in) long. Distribution: Oaxaca and Puebla, Mexico.

Coryphantha reduncispina

Coryphantha robustispina (Schott ex Engelmann) Britton & Rose 1923

devil's pincushion, needle mulee, pima pineapple cactus, pineapple cactus, robust pincushion, scheer cory-cactus, scheer's strong-spined cory-cactus, stout needle mulee Mammillaria robustispina Schott ex Engelmann 1856, Coryphantha scheeri var. robustispina (Schott ex Engelmann) L. D. Benson 1969 Echinocactus muehlenpfordtii Poselger 1853, illegitimate name; Coryphantha muehlenpfordtii(Poselger) Britton & Rose 1923, illegitimate name

Mammillaria scheeri Muehlenpfordt 1847, Coryphantha scheeri (Muehlenpfordt) Lemaire 1868, C. robustispina subsp. scheeri (Muehlenpfordt) N. P.Taylor 1998 Coryphantha neoscheeri Backeberg 1961 Coryphantha scheeri var. uncinata L. D. Benson 1969, C. muehlenpfordtii subsp. uncinata (L. D. Benson) Dicht 1966, C. robustispina subsp. uncinata (L. D. Benson) N. P. Taylor 1998

Plants usually solitary, globose to ovoid, dull gray-green, 515 cm (2-5.9 in) high, 5-9 cm (2-3.5 in) in diameter. Tubercles ovoid to cylindrical, fairly firm, to 30 mm (1.2 in) long; furrows deep, with one or more glands. Central spines 1-4, straight, curved, or hooked, whitish to gray, with dark tips, 12-50 mm (0.5-2 in) long. Radial spines 6-16, lower ones as thick as the centrals, upper ones thin, whitish, 11-35 mm (0.4-1.4 in) long. Flowers dark golden yellow, pale greenish yellow, or dull yellow, 4-6.5 cm (1.6-2.6 in) long, 5-7.5 cm (2-3 in) in diameter. Fruits cylindrical, green, to 50 mm (2 in) long. Distribution: Arizona, New Mexico, and west Texas, and Sonora and Chihuahua, Mexico.

Three subspecies of Coryphantha robustispina are recognized. Subspecies robustispina is typically larger and has a single curved or hooked central spine; it occurs primarily in Arizona and is listed (as C. scheeri var. robustispina) as endangered in the U.S. Endangered Species Act. Subspecies scheeri always has straight central spines; it occurs in west

Coryphantha reduncispina

Coryphantha Scheeri

Texas, New Mexico, and Chihuahua, Mexico. Subspecies un-cinata has strongly curved or hooked central spines; it occurs in Arizona, New Mexico, west Texas, and Chihuahua.

Coryphantha salinensis (Poselger) A. D. Zimmerman ex

Dicht &A. D. Ltithy 1998 Echinocactus salinensis Poselger 1853 Mammillaria borwigii j. a. Purpus 1927, Coryphantha borwigii (j. a.

Purpus)A. Berger 1929 Coryphantha roederiana Boedeker 1929

Plants usually solitary, globose, ovoid, or short cylindrical, dark green to pale blue-gray, 5-10 cm (2-3.9 in) high, 5-8 cm (2-3.1 in) in diameter. Tubercles conical, rhomboid basally, very firm, more or less erect, often imbricate, to 20 mm (0.8 in) long. Central spines usually 4, often absent on juveniles, straight to strongly curved, dull white to brown to black, 12-15 mm (0.5-0.6 in) long. Radial spines 11-15, equal at first, later unequal, whitish with dark tips, 11-18 mm (0.4-0.7 in) long. Flowers bright yellow, basally red, 4-7 cm (1.6-2.8 in) long, 4-7.5 cm (1.6-3 in) in diameter. Fruits green, 15-20 mm (0.6-0.8 in) long. Distribution: Coahuila and Nuevo León, Mexico.

Coryphantha sulcata (Engelmann) Britton & Rose 1923 finger cactus, nipple cactus, pineapple cactus Mammillaria sulcata Engelmann 1845 Coryphantha obscura Boedeker 1930 Coryphantha speciosa Boedeker 1930

Plants commonly forming clumps. Stems globose to ovoid, green, 4-13 cm (1.6-5.1 in) high and in diameter. Tubercles lax, conical, to 12 mm (0.5 in) long; furrows often with glands. Central spines 1-3, sometimes absent, at least one erect, others bent backward, needle-like, yellow or rose, later gray, 9-12 mm (0.4-0.5 in) long. Radial spines 8-14, whitish, needle-like, radiating, 8-18 mm (0.3-0.7 in) long. Flowers yellow with red throats, to 6 cm (2.4 in) long and in diameter. Fruits ellipsoidal, green, to 30 mm (1.2 in) long. Distribution: south Texas, and Coahuila and Nuevo León, Mexico.

Coryphantha sulcolanata (Lemaire) Lemaire 1868 Mammillaria sulcolanata Lemaire 1838 Mammillaria conimamma Linke 1857, Coryphantha conimamma (Linke)A. Berger 1929

Plants commonly forming clumps. Stems depressed globose, often flattened apically, shiny green, to 5 cm (2 in) high and 6 cm (2.4 in) in diameter. Tubercles more or less conical above, pentagonal basally, to 20 mm (0.8 in) long, axils and furrows densely woolly. Central spines absent. Radial spines 9-10, unequal, upper and lower ones short, laterals longer, yellowish white with dark tips at first, later darker, 12-16 mm (0.5-0.6 in) long. Flowers yellow, 4-8 cm (1.6-3.1 in) long, to 6 cm (2.4 in) in diameter. Fruits pale green, to 30 mm (1.2 in) long. Distribution: Hidalgo, Veracruz, and Oaxaca, Mexico.

Continue reading here: Coryphantha tripugionacantha a b Lau 1988

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