1924] 
GRANT—A MONOGRAPH OF THE GENUS MIMULUS 295 
Eunanus nanus Holzinger, Contr. U. S. Nat. Herb. 3: 244. 
1895. 
Small leafy plants, viscid-puberulent or sometimes densely 
glandular-pubescent, 5-15 cm. high, usually freely branched from 
near the base, branches low and spreading; stems mostly straw- 
colored, occasionally more or less tinged with red; leaves obovate 
to oblong, 1-3 em. long, 2-6 mm. broad, acute or obtuse, thin, 
entire, 1-3-nerved, lower leaves larger and somewhat spatulate, 
tapering to а distinct petiole; flowers abundant, pedicels slender, 
2-3 mm. long; calyx tubular-campanulate, 7-8 mm. long, scarious 
below the sinuses, throat slightly if at all oblique, not constricted, 
teeth nearly equal, triangular-acute, about one-fourth as long as 
the tube; corolla bilabiate, 1.7-2 cm. long, reddish-purple, 
puberulent outside, tube yellowish, slender, exserted, about twice 
as long as the calyx, throat funnelform with two hairy white or 
yellow patches dotted with red below the lower lip and irregular 
darker reddish-purple areas below the upper lip, lobes unequal, . 
sinuses broad, rounded, upper lip more or less erect and longer 
than the lower one; anthers hispid, filaments of the longer pair 
of stamen times puberulent; style and upper pair of stamens 
slightly exserted, stigma-lobes nearly equal, peltate-funnelform, 
ciliate; capsule in general slightly exceeding the calyx, ovate, 
obtuse; seeds oval, reticulate, apiculate at each end. 
Distribution: common in open sandy places in the Rocky 
Mountains and in the Pacific Coast States. 
nd: 
1899, Nelson & Nelson 5494 (R. Mt.). 
Wyoming: Fire Hole, Yellowstone Park, July, 1904, Oleson 14, 
(R. Mt.) ; Lower Basin, Yellowstone Park, 15 July, 1906, 
Cooper 61y (R. Mt.); on sandy or gravelly open flats, Upper 
Geyser Basin, 31 July, 1899, Nelson & Nelson 6256 (Cornell, 
M, R. Mt., and Pomona) ; Yellowstone Park, 9 Aug., 1885, 
Letterman 116 (M); ant hills, Henry's Fork, Snake River, 
9400 ft. alt., 19 June, 1860, Hayden (M). 
Colorado: Graymont, without date, Letterman (M). 
Idaho: grows only on ant hills, Shoshone Flat, Minidoka National 
Forest, 6300 ft. alt., 3 Aug., 1913, Crockett 29 (В. Mt.); Lake 
