520 SCROPHULARIACEA .- MIMULUS 
stems slender, 6-12 inches long, usually decumbent or ascending: leaves 
ovate, acute or acuminate, coarsely serrate-toothed, 1-3 inches long, short- 
petioled: peduncles about equalling the leaves: calyx-teeth triangular- 
subulate, half the length of the tube, nearly equal: corolla golden yellow, 
an inch or more long, the ample throat purple-dotted and strongly bearded 
to the base in two lines inside, the bilabiate limb an inch broad, its lobes 
entire and ciliate: seeds ovate, acute, scrobiculate, reddish-brown, Along 
streams in the Coast Mountains, Oregon to California. 
M. hirsutus. Herbage dark green, glabrous below, the inflorescence 
hirsute, stems stoutish, 1-2 feet high very numerous and cespitose : root 
perennial by short basal stolons: leaves oblong or oval, obtuse, denticulate, 
1-3 inches long, the lower ones short-petioled and often laciniately lobed 
or lyrate: peduncles stout, often more than an inch long: calyx campanu- 
late in flower, the teeth unequal, the upper one largest, the tube becoming 
inflated in fruit, often purple-dotted or almost red, the 2 lower teeth 
incurving and closing the orifice: corolla bright yellow, an inch long, fun- 
nelform ; lobes of the upper lip oblong, narrowed at the apex, recurved; 
the middle lobe of the lower lip 5-6 lines broad, as broad or broader than 
long, emarginate; the throat spotted with dark red on the lower side, the 
pubescent lines reaching its base: stamens not exserted: stigmas fan- 
shaped, erose-dentate and apiculate: capsule oblong, short-stipitate. On 
wet rocks in the Tualatin and Willamette rivers Oregon: beginning to flow- 
er about the first of July. 
M. grandiflorus. Herbage pale green and glabrous up to the inflores- 
cence which is sparsely hairy: stems often stout, 1-4 feet high, usually 
solitary or 2-4 together: root perennial by basal stolons: leaves oblong to 
_ ovate, most of them petioled, 1-5 inches long, coarsely toothed and denticu- 
late, the lower ones sublyrate : peduncles 1-14 inches long : calyx campanu- 
late, about 8 lines long, its triangular acute teeth unequal, 2-3 lines long, 
the tube slightly inflated in fruit and more or less spotted with red, the 2 
lower teeth incurved and closing the orifice: corolla often nearly 2 inches 
long, bright yellow, lobes of the upper lip oblong, rounded at the apex, erect 
and slightly recurved, lateral irae of the lower lip almost square, the 
middle one broadly cuneate, as long or longer than broad, emarginate; the 
throat spotted with dark red or brown, the pubescent lines extending to 
its base: stamens not exserted; stigmas fan-shaped, erose-dentate and 
apiculate : capsule oblong, stipitate. Growing in wet places along streams, 
western Oregon and Washington: beginning to flower early in May. 
M. Langsdorfii Sims.? Herbage light green, often marked with dark 
brown: glabrous or the inflorescence minutely pubescent: stems terete, 
6-20 inches high, usually paniculately branched, erect or the base often 
horizonta! and rooting for a few inches, thus perennial: leaves orbicular or 
ovate, the blade 6-20 lines long, dentate or denticulate, usually sublyrate, 
purple beneath, all petioled: floral bracts 2-6 lines long, connate-clasping : 
pedicels slender, about an inch long: calyx campanulate, in flower about 
4 lines long, often mottled with dark purple, at length much inflated, the 
4 lower teeth incurved and closing the orifice: corolla yellow, 10-12 lines 
long funnelform; lobes’of the upper lip erect, oblong, 4-6 lines long: the 
middle lobe of the lower lip broadly cordate, pendulous: the throat usually 
spotted with dark red, the pubescent lines running to the base: capsule 
oblong, 3-4 lines long, on a stipe about aline long: seeds oblong. In wet 
places, California to Alaska and the Rocky Mountains: flowering from 
early spring until August. 
M. Scouleri Hook. FI. ii, 100. Glabrous throughout: stems erect, 
from a stoloniferous base, 1-2 feet high: leaves oblong-lanceolate, 1-2 
inches long, obtuse or acutish, evenly callous-dentate, the lower tapering 
into petioles: peduncles 1-2 inches long, much longer than the bracts: 
