Mammillaria mainiae k Brandegee 1900

COUNTERCLOCKWISE PINCUSHION, HORNED-TOAD CACTUS Chilita mainiae (K. Brandegee) Orcutt 1926, Ebnerella mainiae (K. Brandegee) Buxbaum 1951

Plants solitary to branching freely basally. Stems globose to ovoid, bright green, sometimes reddish in axils, 6-7 cm (2.42.8 in) high, 10-12 cm (3.9-4.7 in) in diameter. Tubercles cylindrical, becoming conical, somewhat incurved, without latex, axils naked. Central spines 1-2, hooked, stout, brown or yellow, with dark tips, to 15 mm (0.6 in) long. Radial spines 8-15, yellow, becoming white, with dark tips, slender, needle-like, to 12 mm (0.5 in) long. Flowers pinkish white with prominent purplish pink midveins, 10-20 mm (0.40.8 in) long and in diameter. Fruits small, globose to ovoid, bright red, remaining beneath the spines. Seeds black. Distribution: Arizona, and Sonora and Sinaloa, Mexico.

Mammillaria mammillaris (Linnaeus) Karsten 1882 Cactus mammillaris Linnaeus 1753 Mammillaria simplex Haworth 1812, illegitimate name Mammillaria pseudosimplex Haage & Backeberg 1961, not validly published

Plants solitary or forming clumps. Stems globose to short cylindrical, light to dark green, shiny, to 20 cm (7.9 in) in diameter. Tubercles conical, with latex, axils with scant wool. Central spines 3-5, reddish brown, with dark tips, later gray, 7-8 mm (0.3 in) long, uppermost longest. Radial spines 1016, reddish brown, becoming gray with age, 5-8 mm (0.2-

0.3 in) long. Flowers funnelform, creamy white, 10-12 mm (0.4-0.5 in) long. Fruits club shaped, red, 10-20 mm (0.40.8 in) long. Seeds small, brown, rough. Distribution: Lesser Antilles, Trinidad, Tobago, Curaçao and neighboring islands of the Netherlands Antilles, and Venezuela.

Mammillaria marcosii W. A. Fitz Maurice, B. Fitz Maurice & Glass 1997

Plants forming irregular clumps. Stems globose to short cylindrical, to 5 cm (2 in) in diameter. Tubercles soft, cylindrical, with round tips, without latex, axils with wool and as many as 15 crinkly bristles to 15 mm (0.6 in) long. Central spines 7-14, mostly radiating, ascending, needle-like, white to yellow to reddish brown to brown, 10-20 mm (0.4-0.8 in) long, one descending and variably hooked, all others straight. Radial spines 16-25, radiating, needle-like, straight, white, 4-12 mm (to 0.5 in) long. Flowers yellowish white with pinkish tint, to 15 mm (0.6 in) long and 10 mm (0.4 in) in diameter. Fruits obovate to cylindrical, red, 6-13 mm

Mammillaria magnimamma
Mammillaria mammillaris, photograph by Keith Grantham

430 Mammitiaria marcosii

(0.2-0.5 in) long, not rising above the spines. Seeds brownish black. Distribution: Guanajuato, Mexico.

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