138 



THE CACTACEAE. 



Illustrations: Ann. Rep. Smiths. Inst. 1908: pi. 2, f. 3; Blanc, Cacti 70. No. 1359, as 

 Mammillaria leona. 



Figure 150 is from a photograph of a cluster of plants obtained in Zacatecas by F. E. 

 Lloyd in 1908. 



100. Neomammillaria mazatlanensis (Schumann). 



Mammillaria mazatlanensis Schumann, Monatsschr. Kakteenk. ii: 154. 1901. 

 Mammillaria littoralis K. Brandegee, Kew Bull. Misc. Inf. 1908: App. 91. 1908. 



Plants cespitose, often forming broad clumps with many oblong heads, 4 to 10 cm. long, about 

 2 cm. in diameter; tubercles terete, 3 to 4 mm. long, their axils naked; radial spines 12 to 15, seta- 

 ceous, spreading, white; central spines 4 to 6,* stouter than the radials, reddish, ascending, 8 to 

 ID mm. long; flowers from the axils of the old tubercles but towards the top of the plant, 3 cm. long 

 or more, red; perianth-segments oblong, spreading; stigma-lobes 8, very long and slender. 



Type locality: Mazatlan. 



Distribution: On the hills near the sea, about Mazatlan, Mexico. 



Dr. Rose collected this plant in 1897 and again in 1910. From this last collection we 

 still have growing plants, but these have never flowered. 



Mammillaria littoralis K. Brandegee, first mentioned in 1907 (Monatsschr. Kakteenk. 

 17: 80), seems never to have been described by Mrs. Brandegee but was described in the 

 Kew Bulletin as mentioned above, where it was stated to be from " Calif omia(?)." It was 

 doubtless sent by Mrs. Brandegee from California but collected at Mazatlan. 



Illustration: Monatsschr. Kakteenk. 15: 155, 0.5 Mammillaria mazatlanensis. 



Figure 151 is from a photograph sent by L. Quehl, showing a flowering plant. 



101. Neomammillaria sphacelata (Martins). 



Mammillaria sphacelata Martius, Nov. Act. Nat. Cur. i6: 339. 1832. 

 Eckinocactus sphacelatus Poselger, Allg. Gartenz. 21: 107. 1853. 

 Cactus sphacelatus Kuntze, Rev. Gen. PI. i: 261. 1891. 



Usually densely cespitose, often grayish, forming clumps 3 to 4 dm. in diameter, the individual 

 plants cylindric, more or less elongated, often i to 2 dm. high; radial spines 14 to 20, usually white 

 with black tips ; central spines 3 or 4, usually black 

 or reddish throughout, sometimes becoming white 

 in age; axils of tubercles often bearing tufts of 

 short hairs and occasionally a few bristles ; flowers 

 about 15 mm. long, purplish; fruit red, clavate; 

 seeds black, the surface deeply pitted. 



Type locality: Mexico, possibly in Oaxaca 

 or Puebla ; it was collected by Karwinsky. 



Distribution: Puebla and Oaxaca; Schu- 

 mann reports it, but doubtless erroneously, 

 from Hidalgo (Zimapan) and Sonera (Guay- 

 mas). 



Illustrations: Nov. Act. Nat. Cur. 16: 

 pi. 25, f. i; Monatsschr. Kakteenk. 28: 74; 

 Grassner, Haupt-Verz. Kakteen 1914: 36, as 

 Mammillaria sphacelata. 



102. Neomammillaria albicans sp. nov. 



Plants at first globose but becoming cylindric 

 and then 10 to 20 cm. long, up to 6 cm. in diame- 

 ter, often in clumps of 5 to 15; spines almost 

 hiding the plant body and often pure white ; radial 

 spines numerous, short, stiff, widely spreading; central spines several, straight, stiff, often brownish 



* Sometimes one of the central spines is hooked, as is shown in plants from near the type locality collected by Senor 

 J. G. Ortega in 1922. 



Fig. 152. — Neomammillaria albicans. 



