NOTES ON CACTE III. 
KATHARINE BRANDEGEE. 
Mamillaria (Coryphantha) Nickels. Soon and densely 
‘ caespitose, glaucous and often purplish, 4-6 cm. high, hemi- 
spherical or globose; tubercles 10-12 mm. long, becoming quite 
as broad and imbricated; spines 14-18 all radial, slender, at first 
yellowish with darker tips, later all gray; lower spines 8—1o mm. 
long, the upper % longer, stouter, extending into the groove and 
forming a fascicle, the clustered fascicles making an upright tuft 
at the vertex; flowers 5-7 cm. in full expansion, said to be 
bright yellow with red center; fruit unknown. 
Southward from Laredo, ’Texas. Named for the collector, Mrs. 
Anna B. Nickels, and offered in catalogues as 7, Nickelstt, Evi- 
dently closely related to AZ. sulcata Engelm. 
M. (Eumamillaria) Mainz. Hemispherical to ovate, simple, 
or sparingly branched from the base, reaching a height of 10 cm.; 
tubercles glaucous, somewhat incurved, cylindric, becoming con- 
ical, 1-1%4 cm. long, often bright red in the naked axils; radial 
spines, 10-15, yellowish, becoming white, slender, scarcely pun- 
gent, 6-10 mm. long, the upper rather the shorter; centrals 1-2, 
both hooked, rarely an additional upper one;* lower central, 
usually the only one, nearly twice as long as the radials, stout 
and strongly hooked, porrect, brown below, blackish above, 
somewhat twisted; the second central when present, widely di- 
varicate, ascending, weaker and shorter: flowers in crown at 
upper part of stem, pinkish-white or flesh-color, 1-14 cm. in 
length, including the ovary; style whitish, deeply, few-lobed; 
fruit red, globular to obovate, shorter than the tubercles; seeds 
dull-black, punctate, a little more than 1 mm. long, obovate, with 
narrowly-linear basal hilum. 
Named for the collector, Mrs. F. M. Maiu, who found it in So- 
nora, south of Nogales. 
It has been offered by dealers as AZ. Galeottit Scheid, to which 
it is not at all related. 
M. Purpusit Schum. M. f. K. iv. 165 (abb.), and Monog. Cact. 
547, is certainly Echinocactus Simpsont Engelm. ‘The variety first 
