1004 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



paler below, 1 or 2 hooked ; flowers from the axils of the upper tubercles ; 

 outer perianth segments pinkish, darker along the center, the inner lanceolate, 

 acute, nearly white, sometimes tinged with rose (?). 



108. Neomammillaria bocasana (Poselg.) Britt. & Rose, Cactaceae 4: 147. 

 1923. 



Mammillaria hocasana Poselger, Allg. Gartenz. 21: 94. 1S53. 



Northern central Mexico ; type from Sierra de Bocas, San Luis Potosi. 



Cespitose, often forming large mounds ; individual plants globose, 3 to 4 

 cm. in diameter, light green ; tubercles slender, 6 to 8 mm. long, terete, their 

 axils sometimes hairy or bristly ; radial spines represented by numerous long 

 white silky hairs ; central spines solitary, 5 to 8 mm. long, brown but paler 

 at base, hooked, much shorter than the radial spines ; flowers described as 

 white; perianth segments lance-linear, acute, spreading; fruit "green, 4 mm. 

 long ; seeds cinnamon brown." 



109. Neomaminillaria multiformis Britt. & Rose, Cactaceae 4: 148. 1923. 

 San Luis Potosf, the type from Alvarez. 



Cespitose, forming dense clumps, sometimes 25 or more from a single root, 

 either globose or much elongate and 3 to 6 times as long as thick; tubercles 

 terete, 6 to 8 mm. long, their axils bearing long white bristles and white wool ; 

 radial spines 30 or more, acicular, 8 mm. long, yellow or at least becoming so, 

 ascending; central spines 4, a little longer and stouter than the raclials, nearly 

 erect, reddish in the upper part, one of them strongly hooked ; flowers deep 

 purplish red, 8 to 10 mm. long, usually broader than long ; inner perianth 

 segments oblong, acute ; fruit never globose, at least when dry ; seeds black. 



110. Neomammillaria scheidweileriana (Otto) Britt. & Rose, Cactaceae 4: 

 148. 1923. 



Mammillaria scheidiccileriana Otto; Dietr. Allg. Gartenz. 9: 179. 1841. 



Mammillaria monancistria Berg; Schum. Gesamtb. Kakt. 533. 1898. 



Mexico, the range not known. 



Cespitose, globose to cylindric, light green ; tubercles setose in their axils, in 

 8 and 13 spirals, cylindric ; spines all puberulent ; radial spines 9 to 11, seta- 

 ceous, white, 1 cm. long ; central spines 1 to 4, brown, 1 or 2 hooked ; flowers 

 rose-coloi-ed, 12 to 13 mm. long. 



111. Neomammillaria safEordii Britt. & Rose, Cactaceae 4: 149. 1923. 

 Type from Icamole, Nuevo Leon. 



Plants small, globose to short-cylindric, 3 to 4 cm. high, dull green, nearly 

 hidden under the dense covering of spines ; axils naked ; spine areoles when 

 quite young slightly woolly but early glabrate, circular; spines all puberulent 

 under a lens when young ; radial spines 12 to 14, somewhat ascending but in age 

 more or less curved outward, when just developing with bright red tips and 

 white bases, later the lower part becoming yellowish; central spines single, 

 stout, reddish, 1.5 cm. long, hooked at apex ; flowers 2.5 cm. long, rose-colored ; 

 outer perianth segments tipped by long bristles, the inner obtuse. 



112. Neomammillaria schelhasei (Pfeift".) Britt. & Rose, Cactaceae 4: 149. 

 1923. 



Mammillaria schelhasei Pfeiff. Allg. Gartenz. 6: 274. 1838. 



Hidalgo, the type from Mineral del Monte. 



Cespitose, forming a large hemispheric mound ; individual plants globose to 

 short-cylindric, olive-green ; tubercles cylindric, their axils a little woolly but 

 not setose; radial spines 14 to 16, setaceous, white; central spines 3, brov/n, 

 one of them hooked at apex ; flowers 2.2 to 2.5 cm. long, salmon or rose-colored ; 

 fruit 5 mm. long. 



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