more or less dark-tipped: flowers 2.5 cm. long, bright scarlet
(almost throughout): fruit 12 mm, long, clavate and red: seeds
black and pitted. (Ill. l. c. t. 6) Type in Herb. Calif. Acad.

Abundant on Magdalena and Santa Margarita Islands, western coast
of Lower California. Fl. January.

Specimens examined: Lower California (Brandegee of 1889, on
Magdalena Island).

The tubercles are so close together that the plant appears
thickly covered with the unusually stout and erect-spreading
straight spines, a few of the centrals being specially prominent.
The plant is more slender than the ordinary "cylindrical"
members of the genus, but stouter than the slender hooked forms
of the preceding section.

26. Cactus rhodanthus (Link & Otto) Kuntze, Rev. Gen. Pl. 261
(1891).

Mamillaria rhodantha Link & Otto, Icon. t. 26 (1828-31)
Mamillaria lanifera Haw. Phil. Mag. lxiii., 41 (), not
Salm-Dyck (1850).

Oblong or subcylindric, 30 cm. or more high, 7.5 to 10 cm. in
diameter, often forking from the middle: tubercles conical, 12
mm. long, 8 mm. in diameter, with woolly axils: radial spines 16
to 20, bristle-like, white, the lower longer (8 to 10 mm.);
central spines 6 or 7, rigid, whitish with black tip, 12 mm.
long: flowers rose color, 12 mm. in diameter: fruit 2.5 cm. long,