CORYPHANTHA. 47 
spreading; central spines several, sometimes as many as 14, much stouter than the radials, slightly 
spreading, those toward top of plant connivent, black or bluish black in their upper half, shading 
into red, nearly white at base; flowers 3 cm. long and nearly as broad when expanded, light pink, 
opening in bright sunlight; scales and outer perianth-segments ciliate; inner perianth-segments 
narrow, acute. 
Type locality: Ivanpah, California. 
Distribution: Deserts of southern California and southern Nevada. 
This species is characterized by its stiff spines, with bluish-black tips shading into 
red, and is known in southern California as fox-tail cactus. The original description of 
Mammillaria deserti states that the flowers are straw-colored, tipped with pink, and this 
suggests Coryphantha chlorantha but we believe that it belongs with Mammillaria alversonit, 
which certainly has pinkish flowers, and since the name deserti is older than alversoniz it is 
substituted for it. 
Illustrations: Cact. Journ. 1: pl. for February, in part; Alverson’s Cat. pl. facing 8, as 
Mammillaria alversonii; Schumann, Gesamtb. Kakteen 480. f. 79, as M. radjosa alversonit. 
Figure 44 is from a photograph of a single plant sent by E. C. Rost; figure 45 is from a 
photograph of a clump photographed by E. C. Rost in its natural surroundings; figure 46 
shows a flower taken from Mr. Rost’s plant. 
Fic. 48.—Mammillaria recurvispina. 
Fic. 47.—Coryphantha aggregata. 
35. Coryphantha aggregata (Engelmann). 
art. j i . 848. 
Mammilaria aggregata Engelmann 1n Emory, Mil. Reconn. 157-_ ! 
Cereus aggregatus Coulter, Contr. U. 5. Nat. Herb. 3: 396. 1896, 8 A me 
Echinocereus aggregatus Rydberg, Bull. Torr. Club 33: 146. 1900, as . 
short-oblong, very spiny; radial spines numerous, stouter 
than those of Coryphantha vivipara, white, often with brown tips, appressed ; central spines sev eral, 
stout, all erect and appressed or one often porrect, those towards top of Plant conn en s flowefs 
very large and showy, purplish, 5 to 7 cm. ‘broad; outer perianth-segments ct ia — inn ps a nth 
segments narrowly oblanceolate, often 6 mm. broad, acute, apiculate; stigma-lo es O ro. € onigated, 
white; fruit green, oblong, 2 to 2.5 cm. long, naked or occasionally bearing a smal! sca ; 
juicy; seeds dark brown, 2 mm. long. 
Type locality: Head waters of the Gila. ; 
Distribution: Western New Mexico, southeastern Arizona, and northern Sonora. 
Mamumillaria aggregata came from the headwaters of the Gila. The type was not 
preserved and is known only from a drawing reproduced in Emory’s report. There has 
Plants solitary or cespitose, globular to 
