NEOMAMMILLARIA. 157 
This plant is described chiefly from the specimens collected by Rose, Standley, and 
Russell, near Hermosillo, Sonora, Mexico (No. 12 366, type), but it has also been collected 
in Sonora by C. R. Orcutt and by Charles Sheldon, for whom it is named. 
The plant differs from the Neomammillaria microcarpa in its stouter redder spines, 
in its heavier and shorter central spine with the hook more uniformly turned upward, and 
in its flowers, which appear to be smaller. 
Figure 175 shows a plant collected by Rose, Standley, and Russell, in Hermosillo in 
1910 (No. 12366), which flowered in Washington. 
Fic. 175.—Neomammnillaria sheldonii. Fic. 176.—Neomammnillaria carretii. 
134. Neomammillaria armillata (K. Brandegee). 
Mammiillaris armillata K. Brandegee, Zoe §: 7. 1900. 
In clusters of 3 to 12, cylindric, sometimes 30 cm. high; tubercles bluish green, somewhat 
angled ; axils setose and slightly woolly; radial spines 9 to 15, 7 to 12 mm. long, yellowish; central 
spines 1 to 4, but usually 2, brownish, the lowest one hooked and a little longer than the others; 
flowers 10 to 12 mm. long, greenish to flesh-colored; stigma-lobes greenish, short; fruit red, clavate, 
15 to 30 mm. long; seeds black, punctate, constricted just above the base. 
Type locality: San José del Cabo. 
Distribution: Southern Lower California and on islands adjacent to it. 
This species is very common in southern Lower California near the coast. Dr. Rose 
in 1911 collected it both at the type locality (No. 16455), and at Cape San Lucas (No. 
16374). Similar to this is his plant (No. 16877) from Cerralbo Island off the coast of 
Lower California. 
Illustration: Grassner, Haupt-Verz. Kakteen 1914: 23, as Mammillaria armillata. 
Plate xiv, figure 4, shows the top of a plant collected by Dr. Rose on Margarita 
Island, Lower California, in 1911 (No. 16302) ; plate xv, figure 2 shows a plant collected by 
Dr. Rose on Santa Maria Bay (No. 16276); figure 3 shows the top of a plant collected by 
Dr. Rose at San Esteban, Lower California; figure 4 shows another plant from the same 
island. 
135. Neomammillaria fraileana sp. nov. 
Stems elongated, cylindric, 1 to 1.5 dm. long; axils of tubercles naked or containing at most a 
single bristle; central spines dark brown, one of them strongly hooked; flowers rather large, pinkish; 
