Mammillaria polyedra Martius 1832

Plants solitary at first, later forming clumps. Stems globose to short cylindrical, deep green, to 30 cm (12 in) high, 10-12 cm (3.9-4.7 in) in diameter. Tubercles pyramidal, six- or seven-sided, with latex, axils with wool and bristles. Central spines absent. Radial spines 4-6, straight, brownish yellow with purplish tips, 6-25 mm (0.2-1 in) long, upper ones longest and strongest. Flowers pink, to 25 mm (1 in) long. Fruits wide, club shaped, red. Seeds brown. Distribution: Oaxaca, Mexico.

Mammillaria poly thele Martius 1832 Mammillaria tetracantha Pfeiffer 1837

Mammillaria obconella Scheidweiler 1839, M. polythele subsp. ob-

conella (Scheidweiler) D. R. Hunt 1997 Mammillaria kewensis Salm-Dyck 1850 Mammillaria hidalgensisJ. A. Purpus 1907 Mammillaria durispina Boedeker 1928, M. polythele subsp.

durispina (Boedeker) D. R. Hunt 1997 Neomammillaria hoffmannianaT\ege\ 1934, Mammillaria hoffmanni-

ana (Tiegel) Bravo 1937 Mammillaria ingens Backeberg 1942 Mammillaria kelleriana Schmoll ex R. T. Craig 1945 Mammillaria neophaeacantha Fritz Schwarz ex Backeberg 1949 Mammillaria subdurispina Backeberg 1949 Mammillaria xochipilli Reppenhagen 1987

Plants solitary. Stems cylindrical, usually erect but sometimes sprawling, blue green, to 60 cm (24 in) high, 5-15 cm (2-5.9

in) in diameter. Tubercles prominent, globular conical, with latex, axils woolly. Central spines absent. Radial spines sometimes 2 at first and pointing up and down, later 3-4 or more, or 3-8 of varying lengths, pale to dark brown, sometimes reddish brown, to 25 mm (1 in) long. Flowers rose to pinkish purple, to 10 mm (0.4 in) long. Fruits club shaped, red. Seeds dark brown. Distribution: Hidalgo, Guanajuato, and Quere-taro, Mexico.

Three subspecies of Mammillaria polythele are recognized. Subspecies polythele has stems typically 8-10 cm (3.13.9 in) in diameter and only 2 spines at first, later 3-4; it occurs in Hidalgo, Guanajuato, and Queretaro. Subspecies durispina has stems usually 5-6 cm (2-2.4 in) in diameter and 6-8 radiating spines that vary in length to 15 mm (0.6 in); it occurs in Guanajuato and Queretaro. Subspecies obconella has stems that maybe as much as 15 cm (5.9 in) in diameter and 4 unequal spines arranged like a cross; it occurs in the Barranca de Venados and near Metzquititlan, Hidalgo.

Mammillariapottsii Scheer ex Salm-Dyck 1850

RATTAIL CACTUS

Chilita pottsii (Scheer ex Salm-Dyck) Orcutt 1926 Mammillaria leona Poselger 1853

Plants branching basally and along the stems. Stems cylindrical, blue green, to 20 cm (7.9 in) high, 2.5-3 cm (1-1.2 in) in diameter. Tubercles conical, without latex, axils somewhat woolly. Central spines usually 7, rigid, swollen basally, spreading, curved, brown to bluish black, 4-12 mm (to 0.5 in) long, upper one stout, recurved to erect. Radial spines 30-45, slender, interlacing, white, straight, 3-5 mm long. Flowers not opening widely, brownish red, 10-15 mm (0.4-0.6 in) long and in diameter. Fruits red. Seeds black to blackish brown. Distribution: Texas and throughout northern Mexico in Coahuila, Chihuahua, Durango, and Zacatecas.

Mammillaria Polythele
Mammillaria polythele subsp. polythele

Mammillaria prolifera (P. Miller) Haworth 1812 Cactus proliferus P. Miller 1768, Chilita prolifera (P. Miller) Orcutt 1926,

Ebnerella prolifera (P. Miller) Buxbaum 1951 Cactusglomeratus Lamarck 1783, Mammillariaglomerata (Lamarck)

A. P. de Candolle 1828 Mammillaria multiceps Salm-Dyck 1850, Chilita multiceps (SalmDyck) Orcutt 1926, Ebnerella multiceps (Salm-Dyck) Buxbaum 1951 Mammillaria pusilla [var.] texana Engelmann 1858, M. prolifera subsp.

texana (Engelmann) D. R. Hunt 1997 Mammillaria pusilla [var.] haitiensis K. Schumann ex Gürke 1903, M. prolifera subsp. haitiensis (K. Schumann ex Gürke) D. R. Hunt 1997

Mammillaria prolifera var. arachnoidea D. R. Hunt 1978, M. prolifera subsp. arachnoidea (D. R. Hunt) D. R. Hunt 1997

Plants commonly branching to form large clusters. Stems globose to cylindrical to club shaped, dark green, to 9 cm (3.5 in) high, 4-7 cm (1.6-2.8 in) in diameter. Tubercles cylindrical to conical, soft, without latex, axils naked or with several long fine white hairs. Central spines 5-12, slender, needle-like, straight, pubescent, white to yellow to reddish, with darker tips, 4-9 mm (to 0.4 in) long. Radial spines 2540, often intergrading with the centrals, straight or twisted, white to yellow to brown, bristle- to hairlike, 3-12 mm (to 0.5 in) long. Flowers cream or pinkish yellow, 10-18 mm (0.40.7 in) long. Fruits club shaped to cylindrical, red, to 20 mm (0.8 in) long. Seeds black. Distribution: occurring very widely, from Texas south and east through northern and eastern Mexico, into the Caribbean.

Mammillaria pottsii

Four subspecies of Mammillaria prolifera are recognized. Subspecies prolifera has stems 6-7 cm (2.4-2.8 in) in diameter and yellow spines; it occurs throughout much of the Caribbean. Subspecies arachnoidea has slender, fine central spines and quite narrow funnelform flowers; it occurs in Ta-maulipas and Hidalgo. Subspecies haitiensis has stems to 7 cm (2.8 in) in diameter and more spines, giving it a more whitish appearance; it occurs only on Hispaniola. Subspecies texana has white and brown spines; it occurs in Texas and northeastern Mexico in Coahuila, Tamaulipas, Nuevo León, and San Luis Potosí.

Mammillaria rekoi (Britton & Rose) Vaupel 1925 Neomammillaria rekoi Britton & Rose 1923, Ebnerella rekoi (Britton &

Rose) Buxbaum 1951 Mammillaria pseudorekoi Boedeker 1933 Mammillaria rekoiana R. T. Craig 1945 Mammillaria mitlensis Bravo 1956

Mammillaria rekoi var. aureispina A. B. Lau 1983, M. aureisplna (A. B. Lau) Reppenhagen 1987, M. rekoi subsp. aureispina (A. B. Lau) D. R. Hunt 1997

Mammillaria rekoim. leptacantha A. B. Lau 1983, M. leptacantha (A. B. Lau) Reppenhagen 1987, M. rekoi subsp. leptacantha (A. B. Lau) D.R.Hunt 1997 Mammillaria krasuckae Reppenhagen 1987 Mammillaria pullihamata Reppenhagen 1987 Mammillaria sanjuanensis Reppenhagen 1987 Mammillaria albrechtiana Wohlschlager 1989

Plants usually solitary but sometimes forming clumps. Stems globose to short cylindrical, green, to 15 cm (5.9 in) high, 56 cm (2-2.4 in) in diameter. Tubercles conical to cylindrical, axils sometimes with latex. Central spines 4-7, much stouter than the radials, brown, hooked or sometimes straight, 1015 mm (0.4-0.6 in) long. Radial spines 20-30, fine, needlelike, white to golden yellow, 4-6 mm (0.2 in) long. Flowers

Mammillaria prolifera subsp. haitiensis, photograph by Bill Weightman

Mammillaria pottsii

Mammillaria prolifera subsp. haitiensis, photograph by Bill Weightman

440 Mammillaria rekoi deep purple pink to pink with darker midveins, to 15 mm (0.6 in) long. Fruits red. Seeds brown. Distribution: Oaxaca, Mexico.

Three subspecies of Mammillaria rekoi are recognized. Subspecies rekoi is almost always solitary, has only 4 central spines, the lower one hooked, and about 20 white radials; it occurs fairly widely in Oaxaca. Subspecies aureispina is usually solitary but sometimes has several stems, may reach 15 cm (5.9 in) in height, and has 5-7 straight central spines and 20-23 golden yellow radials; it occurs north of Quiotepec and Yolox, Oaxaca. Subspecies leptacantha often forms clumps of as many as seven stems and has 4-6 curved and hooked central spines and 27-30 radials; it occurs between Mitla and Najapa, Oaxaca.

Continue reading here: Mammillaria rhodantha Link Otto 1829

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