3.Cactus brandegei, sp. nov.

Cylindrical: tubercles sharply quadrangular-conical, 6 to 8 mm.
long, with densely woolly axils: radial spines about 10, slender
and rigid, whitish with dusky tips, spreading but not radiant, 7
to 10 mm. long; central spines 3 or 4, stouter and slightly
longer, erect-spreading (sometimes slightly curved),
reddish-brown below, becoming blackish above: flowers small
(scarcely longer than the tubercle?): fruit unknown. Type in
Herb. Calif. Acad.

San Jorge, Lower California. Fl. April.

Specimens examined: Lower California (Brandegee of 1889, at San
Jorge).

The species has somewhat the spine characters of C. palmeri, but
the sharply quadrangular and longer tubercles with axillary wool
free from bristles suggest a very different affinity.

4.Cactus densispinus, sp. nov.

Globose, 7.5 cm. in diameter, simple: tubercles short, with
woolly axils: radial spines about 25, erect-spreading, slender
but rigid, yellow (brownish to black with age), unequal, 8 to 10
mm. long; central spines 6, a little longer (10 to 12 mm.) and
straight, more rigid and darker, black-tipped: seeds obovate,
reddish-brown, 1 mm. long. Type in Herb. Coulter.