gardens," which generally means that there is not a fragment of
the type in existence.

In dry ravines, from San Diego County, California, southward
throughout Lower California and the neighboring islands
(including Guadalupe Island). "Llavina."

Specimens examined: California (Parry of 1850, 1875; Agassiz of
1872; Parish 450 of 1882 at Vallecito): Lower California (Gabb 18
of 1867; Brandegee of 1889 on Magdalena Island, and 240 of 1890
from San Jose del Cabo): also specimens cultivated in Gard.
Salm-Dyck.

By a misprint in Cact. Mex. Bound, the specific name appeared as
"Goodridgii," and this error appears in almost every subsequent
mention of the species, even in Watson's Bibliographical Index,
although in Syn. Cact. and other references by Dr. Engelmann the
correct form appears.

17. Cactus pondii (Greene).

Mamillaria pondii Greene, Pittonia, i, 268 (1889).

Oval or cylindrical, from low to 30 cm. high, simple or sparingly
branched: radial spines 20 to 30, white and slender; centrals 4
or 5, the longest over 25 mm, long, rigid and strongly hooked,
dark brown above the middle: flowers nearly 5 cm. long, bright,
scarlet: fruit unknown. Type, Pond specimens in Herb. Greene.

Cedros Island, off the west coast of Lower California. Fl.