NEOMAMMILLARIA. 8 1 



Collected at San Carlos Bay, Sonora, Mexico, by Ivan M. Johnston in 1921 (No. 

 4373) and flowered in Washington in April 1922 and April 1923. 

 Figure 726 is from a photograph of the type specimen. 



16. Neomammillaria melanocentra (Poselger). 



Mammillaria melanocentra Poselger, Allg. Gartenz. 23: 17. 1855. 

 Mammillaria erinacea Poselger, Allg. Gartenz. 23: 18. 1855. 

 Mammillaria valida Weber, Diet. Hort. Bois 806. 1898. 



Short-cylindric, glaucous-green; tubercles in 8 and 13 spirals, strongly angled; radial spines 6, 

 stout-subulate, 1.5 to 2 cm. long, brownish; central spines solitary, black, 2 to 3 cm. long, greatly 

 overtopping the stem; flowers pinkish red, the segments linear, acute. 



Fig. 726. — Neomammillaria johnstonii. 



Type locality: Near Monterey, Mexico. 



Distribution: Mexico, but range unknown. 



Illustration: Bliihende Kakteen 3: pi. 129, as Mammillaria melanocentra. 



Figure 73 is a reproduction of the illustration cited above. 



17. Neomammillaria runyonii sp. nov. 



Plants deep-seated, depressed; tubercles milky, elongated, 1.5 cm. long, strongly 4-angled, 

 their tips widely separated from each other, their axils long- woolly (never setose), especially when 

 young, sometimes permanently so; young spine-areoles long- woolly, but in age glabrate; radial 

 spines 6 to 8, slightly ascending, the outer ones stouter and often dark brown in color, the inner ones 

 about half the length of the outer and nearly white; central spine solitary, brown to black, erect, 

 10 to 14 mm. long; flowers about 2 cm. long, purple; perianth-segments oblong; fruit red, clavate, 

 12 to 16 mm. long; seeds brown. 



Collected on Bl Mirador, near Monterey, Mexico, by Robert Runyon in 1921. 

 Plate X, figme 2, is from a photograph of one of the plants Mr. Runyon originally 

 brought from El Mirador. 



