about 2.5 cm. long, yellow or reddish: stigmas 2 to 5: fruit
globose, scarlet, 6 to 8 mm. in diameter: seeds globose, black
and pitted, 0.8 to 1.1 mm. in diameter. (Ill. Cact. Mex. Bound.
t. 74., f. 6, seeds.) Type unknown.

High prairies of the Upper Missouri, from Montana to South Dakota
and southward through western Nebraska to western Kansas and the
eastern slopes of the mountains of Colorado. Fl. May.

Specimens examined: Montana (Notestein of 1893): National Park
(Tweedy 423): South Dakota, (collector unknown, in 1847, 1848,
1853): Nebraska (Hayden of 1855).

38. Cactus missouriensis similis (Engelm.).

Mamillaria similis Engelm. Pl. Lindh. 246 (1845).
Mamillaria nuttallii caespitosa Engelm. Syn. Cact. 265 (1856).

Mamillaria missouriensis caespitosa Watson, Bibl. Index,
403 (1878).

Cespitose, with 12 to 15 puberulent radial spines, the central
very often wanting, larger flowers (2.5 to 5 cm. long), fruit and
seeds (1.6 to 2.2 mm. in diameter), and 5 stigmas. (Ill. Cact.
Mex. Bound. t. 74. f 7, seeds) Type, Lindheimer, of 1845 (?) in
Herb. Mo. Bot. Gard.

From the Kansas River, Kansas, and eastern Colorado, southward
through Oklahoma to the San Antonio River, Texas.