1924] 
GRANT—A MONOGRAPH OF THE GENUS MIMULUS 145 
Section 3. SrMIOLUS Greene 
$3. біміоілув Greene in Bull. Calif. Acad. Sci. 1: 109. 1885, 
in part. 
Annuals or perennials, glabrous or pubescent; leaves variable; 
calyx becoming inflated at maturity and loosely investing the 
membranaceous capsule, teeth unequal, the lower usually сигу 
upwards over the lateral teeth, partly or nearly closing the orifice; 
corolla distinctly bilabiate with two prominent hairy ridges below 
the lower lip, these sometimes almost elosing the throat; stamens 
included, glabrous; style glabrous or puberulent, included; cap- 
sule dehiscent to the base along both sutures, placentae completely 
united. Sp. 10-25. 
KEY TO THE SPECIES 
A. a open; flowers axillary, in a loose few-flowered raceme or 
olitary; stems low, mostly creeping or procumbent. 
a. бае б. 
а. Corolla more than 2.5 сш. long. 
І. Leaves in a basal товеЙе.......................... 12. M. acaulis 
II. Leaves mostly cauline. 
l. Leaves broadly ovate or rounded, ifc) corolla prs 
sometimes with red ог pinkish-purple spots.........- 
2. Leaves subrhombic-ovate or лар (T nol 3-5-nerved; 
corolla copper-colored when mature............ 11. M. cupreus 
8. Corolla less than 2.5 em. long. 
Leaves mostly suborbicular, more or less covered with short 
stiff, white hairs; corolla laciniately lobed or erose. .21. M. dentilobus 
IL Leaves broadly ovate to suborbicular, glabrous or nearly во; 
corolla-lobes mostly entire. 
* Leaves radical; flowers subsessile.........----- 28. M 4 
** Leaves mostly cauline; pedicels еї or shorter than the 
ате а ла LA, QUU EIER EAS . M. glabratus 
2. Stems not glabrous 
Stems erect, ductu oiled КОСАК УРУ ATE ENT 19. M. Whipplei 
2m rostrate, densely pubescent. 
T Leaves sessile or short-petioled. ou 
t Whole plant pubescent.......-----+-+> 24. M. pilosiusculus 
tt Upper part of stems pubescent...25a. M. glabratus var. d agere 
tt Ps ibe long-petioled......... n 22. М. сгіт 
B yah 4.1. roe ee м ...... 20. M. pallens 
B. Corolla-throat partly or nearly closed by the prominent palate; flowers 
commonly numerous in a definite raceme, sometimes few-flowered. 
8. Upper calyx-tooth rarely more than twice the length of the others, the 
lower teeth in maturity usually folding over and partly closing the 
orifice. 
