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, 4-20 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, 

 erect, 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. 



