CORYPHANTHA. 45 



Mammillaria montana is described briefly and figured (f. 1399) by Blanc in Hints on 

 Cacti, p. 72. It is also described and figured by Darel (Illustr. Handb. Kakteen 96. f. 81), 

 who says that it comes from Montana and Utah. It is illustrated by Haage (Cact. Kultur 

 ed. 2. 187). It is apparently the same as Coryphantha vivipara. 



Illustrations: Cycl. Amer. Hort. Bailey 2: f. 1356; Stand. Cycl. Hort. Bailey 4: f. 

 2315; Tribune Hort. 4: pi. 140; Curtis's Bot. Mag. 126: pi. 7718; De Laet, Cat. Gen. f. 

 43; Cact. Mex. Bound, pi. 74, f. 3 (seed); Meehan's Monthly 9: pi. 9, as Mammillaria 

 vivipara; Clements, Rocky Mountain Flow. pi. 32, f. 7; Clements, Fl. Mount. Plain pi. 32, 

 f. 7; Britton and Brown, Illustr. Fl. 2: 462. f. 2526, as Cactus viviparus; Monatsschr. 

 Kakteenk. 3: 132; Schelle, Handb. Kakteenk. 236. f. 150; Floralia42: 375, as Mammillaria 

 radiosa; Cact. Mex. Bound, pi. 74, f. 5 (seed), as Mammillaria radiosa texana; Cact. Mex. 

 Bound, pi. 74. f. 4 (seed), as M. radiosa borealis; Britton and Brown, Illustr. Fl. ed. 2. 2: 

 f. 2985. 



32. Coryphantha neo-mexicana (Fngelmann). 



Mammillaria vivipara radiosa neo-mexicana Engelmann, Proc. Amer. Acad. 3: 269. 1856. 



Mammillaria radiosa neo-mexicana Engelmann, Cact. Mex. Bound. 64. 1859. 



Mammillaria radiosa borealis Engelmann, Cact. Mex. Bound. 68. 1859. 



Mammillaria radiosa texana Engelmann, Cact. Mex. Bound. 68. 1859. 



Cactus radiosus neo-mexicanus Coulter, Contr. U. S. Nat. Herb. 3: 120. 1894. 



Cactus neo-mexicanus Small, Fl. Southeast. U. S. 812. 1903. 



Mammillaria neo-mexicana A. Nelson in Coulter and Nelson, Man. Bot. Rocky Mountains 327. 1909. 



Plants usually solitary, globular to short-oblong, 8 to 12 cm. long, the whole body usually hid- 

 den under a mass of spines ; radiaT spines numerous, acicular, usually white ; central spines several, 

 much stouter than the radials, pale below, brown or black towards top; flowers 4 to 5 cm. broad 

 when fully expanded; outer perianth-segments greenish or the ones nearer center purplish, ciliate; 

 inner perianth-segments broadly linear, acuminate and apiculate, more or less serrate above; fila- 

 ments greenish, much shorter than perianth-segments; stigma-lobes extending beyond filaments, 

 white, obtuse, not apiculate as in Coryphantha vivipara; fruit 2.5 cm. long, green, juicy, naked except 

 a few hairy scales near top, capped by withered perianth, depressed at apex. 



Type locality: Western Texas to New Mexico, doubtless at El Paso. 



Distribution: Western Texas, New Mexico, and northern Chihuahua. 



The distribution of this species can not be stated at present very definitely. It may 

 be that some of the plants from northern New Mexico, especially those found in the 

 mountains, may better be referred to C. vivipara, and the same is true of some of the plants 

 from Texas. It is probable that the plants from central Texas and perhaps northwestern 

 Texas may all be referred to C. vivipara. We have no Mexican plants before us but we have 

 plants from El Paso, just over the Mexican Boundary line. Just how far south the species 

 extends we do not know. We have greatly restricted the range from that given by Coulter 

 in the Contributions from the U. S. National Herbarium (3: 120. 1894). 



Illustrations: Gartenwelt 4: 159; Cact. Mex. Bound, pi. 13; Forster, Handb. Cact. ed. 

 2. 304. f. 30, as Mammillaria radiosa neo-mexicana; Watson, Cact. Cult. 181. f. 73; ed. 3. f. 

 50; Diet. Card. Nicholson 4: 566. f. 41, as Mammillaria vivipara radiosa; Diet. Card. 

 Nicholson Suppl. 517. f. 554, as Mammillaria radiosa; Cact. Mex. Bound, pi. 74 (seed), as 

 Mammillaria borealis. 



Plate II, figure i, shows a plant sent from Canutillo, Texas, by Mrs. S. L. Pattison in 

 .1920; figure I a shows the fruit. Figure 43 is from a photograph of a plant collected by 

 Dr. Rose near Albuquerque, New Mexico, in 1908. 



33. Coryphantha arizonica (Engelmann). 



Mammillaria arizonica Engelmann, Bot. Calif, i: 124. 1876. 



Cactus radiosus arizonicus Coulter, Contr. U. S. Nat. Herb. 3: 121. 1894. 



Mammillaria radiosa arizonica Schumann, Gesamtb. Kakteen 481. 1898. 



Sometimes cespitose, forming large clumps a meter broad; each head globose to ovoid, 7.5 to 

 10 cm. in diameter; tubercles about 2.5 cm. long, cylindric, ascending, deeply grooved; spines numer- 



