VOL. §1 Notes on Cactee. 193 
bright magenta, paler towards the base the tips erose, acute, the 
outer surface marked with numerous striz; stamens numerous 
with greenish filaments and yellow anthers; pistil green with 
obtuse stigmas; seeds tuberculate about 1 mm. long. 
Collected by T. S. Brandegee April, 1897, on hills near San 
José del Cabo, Baja California. 
Mamillarla Poselgeri Hildm. Prof. Schumann identifies 17. 
Roseana Brandg. with the above published in ‘“Gartenflora”’ 
1885, p 559, abb. 131. The omission from ‘‘Monog, Cact.”’ of 
this place of publication in a well known German journal was 
hardly excusable. 
M. Schumannii Hildm. ‘To this species, very poorly charac- 
terized, Prof. Schumann refers, probably correctly, MZ. venusta 
Brandg. 
Mamillaria Pringlei Coult. In previous notes* by some slip 
for which I cannot account, this species was compared with J/. 
Carretiz, with which it is in no way connected. ‘The plant in- 
tended was M7. Pfeiffer’, with which it appears to be entirely 
identical. Never having read over the paper until the prepara- 
tion of this paper, I was unaware of the confusion. 
M. obscura Hildm. To this 1. Kleinschmidtiana Zeiss. ap- 
pears to be much more closely related than to 7. angularis Lk. 
& Otto, where Prof. Schumann refers it. 
Mamillaria petrophila. Lactescent, attaining a height and 
diameter of 15 cm. but ordinarily a third less, tubercles short 
with broad base; areolz soon naked; spines chestnut color, 
becoming paler in age; radials 10, about 1 cm. long, central 1, 
sometimes 2, stronger, darker, and nearly twice as long, all 
porrect spreading; axils densely clothed nearly to the base of 
the plant with unusually large and long tufts of fulvous wool in 
which the fruits are nearly hidden; flowers bright greenish-yel- 
low within and without, abruptly expanded above the ovary, 
18-20 mm. long; petals and sepals hardly acute, lightly erose: 
stamens and 6-parted stigma the same color as the flower: berry 
small, roundish, color not noted; seeds reddish, smooth, less than 
I mm. in length. 
Zoe, V. 7. 
