160 Flora of the Palouse Regio?i 



oblong, linear or lanceolate, obtuse, short-stalked, 1-3 cm. long, bearing a 

 few short stiff hairs on the back and margin: inflorescence sparsely pubes- 

 cent with stalked glands: flowers slender-pedicelled, in whorls, from the 

 axils of the reduced upper leaves: calyx-lobes linear: corolla blue, with dark- 

 er lines within, nearly rotate, 1 cm. broad, the lobes of the lower lip smaller 

 than those of the 2-cleft upper lip. A charming little plant, common along 

 streams in Snake River can von. 



268. MIMUIAJS. 



Herbs, rarely shrubs: leaves mostly simple, opposite: flowers 

 axillary, on simple peduncles: calyx prismatic, or rarely cam- 

 panulate, 5-angled, 5-toothed, the upper tooth usually the largest: 

 corolla irregular, 2-lipped; upper lip erect or reflexed, 2-lobed, 

 the lower spreading, 3-lobed: stamens 4, all anther-bearing: stig- 

 ma 2-lobed: seeds numerous. 



Flowers red. M. CUVICOLA. 



Flowers yellow: calyx not prismatic, deeply 5-cleft. M. exilis. 

 Flowers yellow: calyx prismatic, 5-toothed. 



Flowers rather large: plants nearly or quite glabrous. 



Perennial: lip of corolla spotted. M. eangsdorfii. 



Annual: lip of corolla with a large blotch. M. NASUTUS. 

 Flowers small: plants pubescent. 



Plant prostrate. M. floribundus. 



Plant erect: leaves petioled. M. peduncularis. 



Plant erect: leaves nearly sessile. M. breviflorus. 



M. clivicola Greenman. Annual, simple or branched from the base, 2-15 

 cm. high, glandular-pubescent throughout: leaves ovate-oblong or oblanceo- 

 late, 3-nerved, entire or denticulate, 5-20 mm. long: flowers axillary, slender- 

 pedicelled: calyx 6-10 mm. long, nearly equally 5-toothed; the teeth acute, 

 2 mm. long: corolla red-purple, often spotted in the pubescent throat, some- 

 what 2dipped, 1-2 cm. long: capsule linear-oblong, a little longer than the 

 calyx. Gravelly hillsides, Thatuna Hills, rare. 



M. exilis Durand. Annual, erect, usually much branched, villous through- 

 out with soft somewhat viscid hairs, 10-30 cm. high: leaves oblong or lanceo- 

 late, acute, entire, sessile, 1-3 cm. long: pedicels about equalling 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. 

 Sand}' banks of Snake River, rare. 



M. langsdorfii Don. Perennial by short stolons, erect or decumbent, 

 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 loug as or shorter than 

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

 others turn 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, not common in our limits. 



