228 SCROPHULARIACEAE. 



the leaves; calyx campanulate, not at all angled, deeply 5-cleft, oblique at the 

 orifice; corolla yellow, shortly 2-lipped, 6-8 mm. long, the lobes nearly equal. 

 Moist sandy places in the warmer valleys. 



Mimulus moschatus Dougl. Perennial, villous and shiny viscid, musk- 

 scented; stems weak, spreading, ascending or erect, 10-40 cm. high; leaves 

 oblong-ovate, denticulate, 2-5 cm. long, all petioled; peduncles shorter than 

 the leaves; calyx tubular-prismatic, 8-12 mm. long, the unequal teeth acute; 

 corolla pale yellow, spotted in the throat, about 2 cm. long. Springy places 

 in the Blue Mountains; also Thatuna Hills, Idaho. 



Mimulus langsdorfii Donn. Perennial by short stolons, erect or decum- 

 bent, glabrous or puberulent, 15-60 cm. high, or depauperate plants much 

 smaller and dying after blooming; leaves several-nerved from the base, ovate, 

 obtuse or acute, rounded or subcordate at base, the lower long-petioled and 

 often with ragged lobes at base, the upper short-petioled or sessile; floral 

 leaves often cuneate; flowers in a raceme, the pedicels as long as or shorter than 

 the flowers; calyx in fruit 5-angled and inflated, the upper lobe longest, the 

 others turned toward it, all much shorter than the tube; corolla yellow, 

 hairy and often spotted in the throat, usually 2-3 cm. long, the tube exceeding 

 the calyx. Springy places. 



Mimulus nasutus Greene. Much like M. langsdorfii but strictly annual, 

 the leaves usually orbicular; corolla 1-1.5 cm. long, pale-yellow, the tube 

 barely as long as the calyx, the lower lip usually with a large purple blotch. 

 Moist cliffs, especially along Snake River. 



Mimulus breviflorus Piper. Annual, the slender stem simple, or more 

 commonly branched from the base, erect, 420 cm. high, minutely puberulent 

 throughout or nearly glabrous above; leaves lanceolate, rarely oblanceolate 

 or ovate, acute or inconspicuously few-toothed, narrowed at base into a short 

 petiole or subsessile, usually shorter than the internodes, gradually reduced 

 above, mostly about 1 cm. long; flowers solitary in the axils, on slender pedicels 

 which about equal the leaves; calyx narrowly campanulate, somewhat con- 

 stricted above, 2-3 mm. long in flower, 6-8 mm. in fruit, the short acute 

 triangular teeth nearly equal; corolla pale-yellow, tubular, 4-5 mm. long, 

 the lobes short and rounded; stigma scarcely protruding beyond the calyx. 

 Moist ground, local and not common. 



Mimulus peduncularis Dougl. Much like M.floribundus but more slender, 

 rect, puberulent, not villous; leaves 5-25 mm. long, slender- petioled; pedicels 

 slender, as long as or longer than the leaves; calyx-teeth very short. Banks of 

 Snake River, Rock Lake and Lake Waha, Idaho; rare. 



Mimulus floribundus Dougl. Annual, erect when young, soon spreading 

 or prostrate, villous-pubescent throughout with slimy-viscid hairs; stems often 

 30-50 cm. long; leaves ovate, somewhat cordate, acute, dentate, 4-40 mm. 

 long; petioles shorter than the blades; flowers opposite, in the axils; pedicels 

 barely exceeding the leaves; fruiting-calyx 7 mm. long, campanulate, the 5 

 triangular teeth equal, one-fourth as long as the tube; corolla pale yellow, 

 1 cm. long, the limb little spreading. Moist banks, in the warmer valleys. 



341. RHINANTHUS. 



Annual erect herbs, with opposite leaves; flowers yellowish, in 

 a one-sided spike; calyx membranaceous, 4-toothed, inflated in 

 fruit; corolla 2-lipped, the upper lip arched, ovate, obtuse, with 

 two lateral teeth; the lower lip 3-lobed; stamens 4, all anther- 

 bearing, enclosed in the upper lip; anther-cells equal; capsule 

 orbicular, flattened. 



