CORYPHANTHA. 



27 



"Flowers white, large for the size of the plant. May and June. Stem small, compressed, 3 

 in. across, with numerous compressed tubercles, and short hair-like spines (Mexico. 1834. See fig. 

 553). There is another species called M. oltonis, having a large spiny stem." 



Here we believe belong some of the plants which are passing as Mammillaria golziana. 

 Very different, however, are the two published illustrations of Kunze (Cact. 1910 and 

 Monatsschr. Kakteenk. 19: loi. 1909), which also seem to differ from each other. 



Illustrations: Monatsschr. Kakteenk. 12: 47, as Mammillaria hussleri; Monatsschr. 

 Kakteenk. 27 : 3 . f . a, as Mammillaria golziana ; Monatsschr. Kakteenk. 27 : 3 . f . b, as Mammil- 

 laria ottonis. 



4. Coryphantha recurvata (Engelmann). 



Mammillaria recurvispina Engelmann, Proc. Amer. Acad. 3: 266. 

 Mammillaria recurvata Engelmann, Trans. St. Louis Acad. 2: 202 

 Cactus recurvattis Kuntze, Rev. Gen. PI. i: 259. 1891. 

 Cactus engelmannii * Kuntze, Rev. Gen. PI. i: 260. 1891. 



1856. Not De Vriese, 1839. 

 1863. 



Figs. 26 and 27. — Coryphantha recurvata. 



Plant-body depressed-globose, 10 to 20 cm. in diameter, often forming large masses 30 to 90 

 cm. in diameter and sometimes with over 50 heads; tubercles low; radial spines about 20, yellow to 

 gray, with dark tips, pectinate, recurved; central spines i, rarely 2, longer and darker than the 

 radials, 12 to 20 mm. long, more or less reflexed, often appressed; flowers 25 to 35 mm. long, said 

 to be brownish outside; inner perianth-segments lemon-yellow; fruit not known. 



Type locality: Sonora. Explained in the Cactaceae of the Mexican Boundary to be 

 eastern parts of Pimeria Alta in Sonora, especially in the Sierra del Pajarito. 



Distribution: Arizona and Mexico, especially along the United States-Mexican Boun- 

 dary near Nogales. 



Engelmann describes f a peculiar flowering habit for Coryphantha when he says that 

 the flowers originate in the base of the grooves of full-grown tubercles, being scattered over 

 the top of the plant. We have also noticed this character ; not only are the flowers borne 

 in the axils of mature tubercles, but they are produced in great abundance in a circle 5 

 to 6 cm. in diameter. 



* It is possible that Lemaire also gave the name Coryphantha 1 

 this is not shown by the text. 



t See Cact. Mex. Bound. 12. 1859. 



imannii for Mammillaria recurvispina, though 



