156 THE CACTACEAE. 



deserves great credit for the enthusiasm which she has shown in visiting this remote 

 locahty and clearing up a botanical puzzle which had remained unsolved for 70 years.* 



We have not seen any California or Utah plants and we suspect that the material 

 so-named from those states may belong to the genus Phellosperma , which resembles this 

 species in its hooked central spine. The plant is undoubtedly found in northern Mexico, 

 but how far south it extends we are in doubt. 



The variety MammiUaria grahamii calif ornica has not been described. 



Illustrations: Emory, Mil. Reconn. 157. No. 3, as MammiUaria microcarpa; Cact. 

 Mex. Bound, pi. 6, f . i to 8 ; Bol. Direccion de Estudios Biol. 2 : f . 2 ; Riimpler, Sukkulenten 

 199. f. 112; Schelle, Handb. Kakteenk. 254. f. 176; Remark, Kakteenfreund 16, as M. 

 grahamii; Cact. Joum. i: 171, as AI. grayhamii. 



Figures 170 and 173 are from photographs of the plants collected by Dr. Rose from the 

 northern end of the Tucson Mountains, Arizona, April 22, 1908; figure 174 is from a 

 photograph of a plant collected by Mrs. Ross at the type locahty. 



Cactus ESChanzieri Coulter, Contr. U. S. Nat. Herb. 3: 104. 1894. 



"Depressed-globose, 3 cm. in diameter, simple; tubercles broader at base, 6 to 8 mm. long, 

 with naked axils; spines all pubescent; radials 15 to 20, with dusky tips, the lateral 10 to 12 mm. 

 long, the lower weaker, shorter, and cun,'ed, the upper shorter; solitary central spines reddish 

 slender, somewhat twisted, usually hooked upwards, 15 to 25 mm. long; flowers red (?); fruit 

 reddish (?), ovate, about 10 mm. long; seeds reddish, oblique-obovate, 1.2 mm. long, pitted, with 

 subventral hilum." 



It is stated at the original place of pubHcation that the type collected by Eschanzier 

 in 1 90 1 was in the herbarium of Coulter, but it can not be found and is probably lost. 

 Coulter says that it resembles Cactus grahamii, but judging from the description and its 

 habitat it is not very near that species. It is evidently a Neomammillaria, possibly referable 

 to one of the many species which have been described from San Luis Potosi. 



132. Neomammillaria milleri sp. nov. 



Globose to elongated cylindric, sometimes more than 2 dm. long and up to 8 cm. in diameter; 

 tubercles closely set, rather thick, nearly i cm. long, the axils not bristly and seemingly always 

 naked; radial spines about 20, widely spreading, 12 mm. long or less, white, with brownish tips; 

 central spines 2 to 4, one or all hooked at apex, brown, about 2 mm. long; flowers campanulate, 

 about 2 cm. long, the limb 2.5 cm. broad, purple to nearly pink; inner perianth-segments similar to 

 the outer, oblong, the margins a little paler and somewhat undulate, the apex usually obtuse, often 

 rounded, rarely acute; stamens pale purple; style white; stigma-lobes 7 to 9, linear, yellowish to 

 cream-colored; fruit clavate, scarlet, 1.5 cm. long; seeds black. 



Collected by Dr. Gerrit S. Miller jr., near Phoenix in 192 1, and by Mrs. Bly near 

 Kingman, June 29, 1921, and in 1922. It has been observed by C. R. Orcutt near Phoenix 

 (No. 559a, type) and near Wickenburg (No. 559,) during the summer of 1922 and several 

 fine specimens were sent in by him. He states that it has long been known as " Mammil- 

 laria grahamii var." and that it suggested at times AI. phellosperma, M. goodridgei, and 

 M. grahamii. It diflfers, however, from the first in its seeds, from the second in its naked 

 axils, and from the last in its stouter habit and stronger central spines. 



Figure 184a is from a photograph of the type, collected by Mr. Orcutt. 



133. Neomammillaria sheldonii sp. nov. 



Stems slender-cylindric, about 8 cm. high; axils of tubercles without setae; radial spines 12 

 to 15, pale with dark tips, the 3 or 4 upper ones darker, a little stouter and i or 2 of them subcentral, 

 the true central erect or porrect, with upturned hook at end; outer perianth-segments ciliate; inner 

 perianth-segments about 10, broad, acute, light purple with very pale margins; filaments and style 

 light purple; stigma-lobes 6, green; fruit clavate, 2.5 to 3 cm. long, pale scarlet. 



*Mrs. Ross's label bears this note: On upper terrace on right bank of Gila River in s. e. corner, section 15, 

 t. 4 s. R. 16 E. (Christmas Triangle). From grove of cactus in which we believe Emory camped, Nov. 4, 1846. 



