COR YPH ANTRA. 



35 



it are flowers and a spine-cluster from the herbarium of J. W. Toumey, collected in his cactus 

 garden at Tucson, June 12, 1896, and a small specimen from near the type locality obtained 

 by Vernon Bailey, March 22, 1890, and more recently by Fisher at Langtry, Texas. 



Illustrations: Cact. Journ. i: 114; 2: 6; Diet. Gard. Nicholson Suppl. 514. f. 546; 

 Forster, Handb. Cact. ed. 2. 402. f. 42; Rumpler, Sukkulenten 204. f. 115; Journ. Hort. 

 Home Gard. iii. 46: 379; Cact. Mex. Bound, pi. 11; Watson, Cact. Cult. 169. f. 67; ed. 

 3. f. 44; West Amer. Sci. 13: 40; Blanc, Cacti 73. No. 1459; Cassell's Diet. Gard. 2: 48; 

 Remark, Kakteenfreund 15, as Mammillaria pectinata; Schelle, Handb. Kakteenk. 240. 

 f. 158, as M. radians impexicoma [Schelle's illustration is the same as Engelmann's]. 



Figure 31a is from a photograph of a plant obtained by George L. Fisher near Langtry, 

 Texas, in 1922. 





Fig. 31a. — Coryphantha pectinata. 



Fig. 3 1 ft. — Coryphantha echii 



18. Coryphantha nickelsae (K. Brandegee). 



Mainmillaria nickelsae K. Brandegee, Zoe 5:31. 1900. 



Described as globular, densely cespitose, often 7 cm. high, pale green and glaucous; older plants 

 becoming purplish; tubercles almost hidden by the overlapping spines, rather broad at bas2, low, 

 not densely arranged; spines 14 to 16, all radial (a few forming a small fascicle at top of groove), 

 slender, at first simply spreading but afterward bent back and interlaced with those of adjoining 

 tubercles, 8 to 10 mm. long, at first yellowish at base with dark tips, but afterwards bleaching; 

 flowers described as bright yellow, with a red center, 5 to 7 cm. broad; fruit nearly globular, 5 to 

 7 mm. long, green; seeds small, brown. 



Type locality: Mexico, southward from Laredo, Texas. 



Distribution: Northern Nuevo Leon, Mexico. 



Plants collected by Robert Runyon in March 1921, on Mount La Mitra, near 

 Monterey, which we believe should be referred here, deserve some detailed description. 

 They grow in clusters of 4 to 12. From the axils of the lower tubercles near the surface of 

 the ground numerous young plants or buds originate; the young spines are pale yellow, 

 with reddish-brown tips, in age some bleaching white, others brownish to nearly black 

 throughout ; many of the first areoles have only radial spines but old plants often have one 

 central spine 1.5 to 2 cm. long, from all the upper areoles; flowers large, light yellow; inner 

 perianth-segments spreading, linear-lanceolate, acuminate; anthers bright yellow. 



Plate III, figure i, is from a photograph of the plant collected by Mr. Runyon, which 

 was made at his home in Brownsville, Texas, September 15, 192 1. Figure 32 is from a 

 photograph of a specimen sent us by Dr. Richard E. Kunze in 191 1. 



