Flora of the Palouse Region 161 



M. nasutus Greene. Much like the preceding but strictly annual, the 

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

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

 Springy places on the bluffs of Snake River. 



M. 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, Snake River bluffs. 



M. peduiicularis Dougl. Much like the last, 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, rare. 



M. breviflorus Piper. Annual, the slender stem simple, or more com- 

 monly 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 ped- 

 icels which about equal the leaves: calyx narrowly campanulate, somewhat 

 constricted 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. 



269. GRATIOLA. 



Low mostly perennial branching herbs: leaves opposite, sessile: 

 pedtmcles axillary, 1 -flowered: calyx 5-parted, the narrow divis- 

 ions usually equal: upper lip of corolla entire or 2-cleft, the lower 

 3-cleft: anther-bearing stamens 2; sterile filaments 2, simple and 

 included, or none: style dilated or 2-lipped at the apex: capsule 

 4-valved, many-seeded. 



G. virginiana L. Annual: stems erect, branched below, viscid-puberu- 

 lent or pubescent above, nearly glabrous at base, 10-30 cm. high: leaves ses- 

 sile, oblong-lanceolate, acute, entire or toothed, usually narrowed at base, 

 1-2 cm. long, glabrous or nearly so: pedicels slender, equalling the leaves: 

 calyx enclosed at base by 2 foliaceous bracts which equal the lobes: corolla 

 8-IO mm. long, its yellow tube nearly twice as long as the calyx; lobes whit- 

 ish, the two upper notched. Wet places, rather common. 



270. II.YSAXTHES. 



vSmall and smooth annual herbs: leaves opposite, sessile: 

 peduncles axillary, 1 -flowered, the upper becoming racemose: 

 calyx becoming 5-parted, the divisions becoming narrow and 

 nearly equal: upper lip of corolla short, erect, 2-lobed, the lower 



