MAMMILLARIA 



MAMMILLARIA 



1981 



cles somewhat 4-angled; areoles elliptic or rhombic: ra- 

 dial spines none; centrals 4, slender, rigid, the upper 

 curved upward, 1-1 K m - long, the 3 lower half as long, 

 all grayish brown. Mex. 



Var. Galeottii, Foerst. Radial bristles 8-14, very 

 short, soon falling; centrals 4, seldom 1 or 2 more, 

 spreading, yellowish, with points, the upper and lower 

 longest. Mex. 



64. discolor, Haw. Globose or ovate, glaucous: outer 

 spines 16-20, white, radiant; interior 6, rigid, recurved, 

 white below, black above, upper and lowermost very 

 long. Mex. 



65. Lesaunieri, Schum. Hemispherical or very short- 

 cylindrical (habit of M. Heyderi): spines brownish, 

 short; radials 11-13; central upright, stronger. 



66. Haageana, Pfeiff. Cespitose: heads small, at 

 length cylindrical, slender: tubercles small, crowded; 

 axils woolly: radial spines about 20, pure white, only 

 about \Yi lines long; centrals 2, black, slender, elon- 

 gated, upper 3, lower 4 lines long. Mex. 



67. elegans, DC. (M . acanthophlegma, Lehm. M, Pp- 

 toslna, Hort. M. KlugiijTSihrb.). Simple, then prolif- 

 erous and densely cespitose, depressed-globose, later 

 lengthened: tubercles crowded, very small: radial 

 spines more than 20, bristle-like, about 3 lines long, 

 pure white, interwoven and covering the whole plant; 

 central spines 2 (1-3), with brown tips, the one directed 



2316. Mammillaria meiacantha. 



upward, the other downward, about twice as long as 

 radials, in the axils abundant long white wool. Mex. 



EE. The tubercles exuding milk when pricked. 



68. bicolor, Lehm. Simple or proliferous: tubercles 

 small, crowded, ovate-pyramidal: radial spines 16-20; 

 centrals 2, less than 1 in. long, stouter, erect, black- 

 tipped. Mex. 



Var. nivea, Schum. Obovate proliferous tubercles 

 conical: radial spines capillary; centrals 4, white, with 

 dusky apex, upper one incurved, 1 in. long. 



69. Parkinsonii, Ehrb. At length dichotomously 

 divided: tubercles slenderly pyramidal; axils woolly 

 and bristly: radial spines 20 or more, slender; centrals 

 2, 3, 4, rarely 5, brown-tipped, the upper ones 3-4 lines 

 long, the lower 1 J^ in. turned downward. Mex. 



70. formosa, Scheidw. Nearly simple: tubercles 4- 

 angled: radial spines 18-22, rather rigid; centrals 6, a 

 little longer, stiffer, thickened at base, reddish or 

 brownish tipped. 



71. angularis, Link & Otto (M. subangularis, DC.). 

 Densely cespitose: axils of the young tubercles setose 

 as well as woolly: radial spines 3-7, the upper ones 

 often very short, the lower one sometimes 3 in. long, 

 occasionally a very long central present. Mex. 



72. arida, Rose. Sts. usually simple, globular, deeply 

 seated in the ground, 1-2 in. diam.: tubercles very 

 milky, nearly terete: radial spines about 15, pale, with 



dark tips; central spines 4-7: fls. 6 lines long; petals 

 cream-colored to a pale yellow: fr. clavate; seeds brown. 

 Only known from the collection made by J. N. Rose on 

 an island in the Gulf of California near La Paz in 1911. 



73. petrophila, Brandeg. Sts. depressed-globose to 

 short-cylindric, 6 in. high: tubercles milky, about 5 

 lines long: spines chestnut-brown or paler at base; radial 

 spines 8-10; central spines 1 or 2: fls. greenish yellow. 

 Mountains of S. Low. Calif. 



74. centricirrha, Lena. (M. arietlna, and M. deflexi- 

 splna, Lena. M . Foersteri and M. Krameri, Miihlpf. M. 

 Schmidtii, Sencke. M. tetracdntha, Hort.). Copiously 

 proliferous: tubercles pyramidal, 4-angular: spines ir- 

 regular, mostly 4-6 radials and 1 central, sometimes 

 only 1, sometimes 2 centrals with 1-2 very short radials 

 or none; radials very stout, straight or curved, awl- 

 shaped, reaching %in.; central stouter, sometimes 

 nearly 2 in. long; young spines yellow. Mex. 



75. mutabilis, Scheidw. (M. autumnalis, Dietr. M. 

 cirrhifera, Mart.). At length sparingly cespitose, de- 

 pressed-globose or short-cyhndric : tubercles pyramidal, 

 4-angled; axils with stout bristles in the wool: radial 

 spines 1-6, very small; centrals 1-4, angled, flexuous, 

 much longer, particularly the upper one, which reaches 

 2 in. Mex. 



76. Heeseana, McDow. (M. Petersonii, Hildmann). 

 Simple, glaucous or ashy green: tubercles pyramidal, 

 4-angled: radial spines 10-14, the 3 upper pure white 

 and very short, the remainder longer and brownish- 

 tipped; centrals 4, the upper ones erect and forming an 

 elevated covering for the top of the plant, the lower one 

 the longest, 2 in. long, and projecting. Mex. Varies in 

 color of spines. 



77. simplex, Haw. Globose or short-cylindric : radial 

 spines 12-17, the middle ones longest; centrals 45, 

 somewhat longer, reddish: fl. brownish green without, 

 yellowish or whitish green within: fr. red, %in. long, 

 clavate; seed brown. This is the Cactus Mamillaris of 

 Linnseus and the first species discovered. It has for 

 many years been a desideratum in our collections, al- 

 though various species have recently been referred to it, 

 like Mammillaria nivosa and M . pusilla. It has recently 

 been re-discovered on the Isl. of Curacao and in N. 

 Venezuela. This is the only species known from the S. 

 American continent. 



78. nivdsa, Link. Grows in clusters of 25 or more 

 specimens, forming clumps 2 ft. diam. : largest individ- 

 ual specimens sometimes 6 in. diam.: spines all yellow: 

 tubercles very woolly in their axils: fls. cream-colored. 

 Common on exposed cliffs of many of the W. India Isls. 

 A very beautiful species, but not often seen in cult. 



79. hidalgensis, Purpus. Sts. simple, cylindrical, 

 sometimes 1 ft. high: radial spines none; central spines 4: 

 fls. crimson. Cent. Mex. 



80. crucigera, Mart. Sts. cylindrical, 4-6 in. high: 

 tubercles closely set, with their axils full of white wool: 

 radial spines numerous, 20 or more, bristle-like and 

 spreading; central spines 4, yellowish: fls. crimson or 

 purple. Mex. An old species recently intro. into cult. 



81. Brandegei, Coulter (M. Gdbbii, Coulter). De- 

 pressed-globose to short-cylindric or clavate: tubercles 

 slender: radial spines 9-16; centrals 1-4, sometimes 

 shorter than the radials, and stout, sometimes longer 

 and slender, white to brown: fls. reddish brown without, 

 brownish green within: fr. clavate, white, tinged lilac. 

 Cent. Low. Calif. 



82. Heyderi, Miihlpf. (M. texensis, Lab.). Tuber- 

 cles slender: spines short; radials 16-18, short, slender, 

 white; central 1, darker, shorter than the lower radials, 

 brown: fls. yellowish, with pale rosy streak in the petals. 

 Ariz, to Texas. 



Var. applanata, Engelm. Body much depressed, sum- 

 mit flat or concave: radial spines 15-22. Texas. 



