I20 THE CACTACEAE. 



Cactus densispinus and we are convinced that they are the same; Coulter's type is now in 

 the Field ^Museum of Natural History. 



Illustration: iMonatsschr. Kakteenk. 24: 115, as Mannnillaria pseudofuscaia. 



Figure 126 shows the plant sent by Mrs. Vera from San Luis Potosi. 



78. Neomammillaria nunezii sp. nov. 



Globose to C3iindric, 1.5 cm. long, 6 to 8 cm. in diameter; tubercles closelv set, short, terete in 

 section, setose in their axils; radial spines white, stiff, about 30, widely spreading; central spines 2 

 to 4, stout, 10 to 15 mm. long, brown to nearly blackish at tips; fruit 2.5 cm. long, clavate, white or 

 tinged with pink; seeds small, brown. 



Fig. 12S. — Xeomaminillaria nunezii. 



Fig. 129. — Xeomammillaria rhodantha. 



Collected by Professor C. Xunez at Buenavista de Cuellar, Guerrero, Mexico, in 1921 

 (Xos. I, 2 and 3), and communicated to us by Octavio Soils. This species is rather variable 

 in habit and spines and is ven,' unlike an}-thing that we have heretofore studied. 



Figtu-es 127 and 128 are from photographs of the top and side of two plants of this 

 collection. 



79. Neomammillaria amoena (Hoppfer) . 



Mammillaria amoena Hoppfer in Salm-Dyck, Cact. Hort. Dyck. 1S49. 99. 1850. 



Stems robust, columnar; tubercles green, ovoid, obtuse, sub glaucous; radial spiues 16, slender, 

 radiating, white; central spines 2, rigid, yellowish brown, 8 to 10 mm. long, the upper one longer and 

 recur\-ed; flowers appearing from axils above middle of plant, 2 cm. long; tube cone-shaped, green; 

 outer perianth-segments somewhat brownish; inner perianth-segments with a pale-brown central 

 stripe; margins nearly white, obtuse, entire; stamens short; filaments pale; anthers fed; stjde pale 

 green; stigma-lobes green, Unear. 



Type locality: Not cited. 

 Distribution: Central ^Mexico. 



