98 Flora of the Palouse Region 



P. millegrana Engelm. Size and habit of the preceding: leaves all ter- 

 uate: akenes smooth, nearly white. Banks of Snake River, rare. A form 

 with broader leaflets and elongated inflorescence has been named P. biennis 

 Greene. 



159. DRYMOCAIXIS. 



Very similar to the preceding genus: leaves pinnate: style lateral, 

 nearly basal: ovules ascending, orthotropous. 



Very glandular: cyme dense. D. convaixaria. 



Less glandular: cyme loose. D. glandueosa. 



D. COnvallaria Ryd. Perennial: stems erect, stout, glandular-viscid and 

 villous, 40-60 cm. high: basal leaves with 7-1 1 leaflets, these broadly obo- 

 vate, cuneate at base, coarsely and somewhat doubly dentate or incised, 

 glandular-pubescent or glabrate; cauline leaves with fewer leaflets: cyme 

 usually dense, the branches erect: flowers 10-12 mm. broad: calyx very 

 glandular- viscid; bractlets shorter than the calyx-lobes: petals broadly obo- 

 vate, yellowish, barely exceeding the calyx-lobes: stamens about 25. Com- 

 mon on hillsides. 



D. glandulosa Ryd. Perennial: stems erect, 40-50 cm. high, sparsely 

 villous and glandular, loosely branched above: basal leaves with 7-9 leaflets, 

 these obovate or orbicular, simply or doubly dentate, sparsely pubescent, 

 1-3 cm. long; cauline leaves usually with fewer leaflets: flowers 10-15 nim. 

 broad, in loose open cymes: calyx somewhat glandular; bractlets shorter 

 than the ovate acute or acuminate calyx-lobes: petals oval or obovate, about 

 as long as the sepals. Dry open woods, Thatuna Hills. 



160. FRAGARIA. 



Acaulescent perennial herbs, propagating by runners: leaves 

 alternate, basal, tufted, 3-foliolate, with obovate serrate leaflets: 

 flowers polygamo-dioecious, white, few, in corymbs or racemes, 

 on naked scapes: calyx deeply 5-lobed, with 5 alternate bractlets: 

 petals 5, obovate, short-clawed: stamens numerous, in 1 row: style 

 lateral, very short; carpels numerous: receptacle much enlarged 

 and fleshy in fruit, conical, scarlet, bearing the small turgid akenes 

 on the surface. 



Scapes shorter than the leaves: akenes sunk in pits in the fruit. 



F. PLATVPETALA. 



Scapes longer than the leaves: akenes not sunk in pits. F. bracteaTA. 



F. platypetala Ryd. Rootstocks stout: scapes 10-15 cm - high, mostly 

 shorter than the leaves: petioles silky- villous; leaflets somewhat glaucous, 

 elliptic or obovate, broadly cuneate at base, coarsely toothed above the 

 middle, glabrous or nearly so above, appressed silky-villous below, 2-5 cm. 

 long: runners long, rather stout, 12-16 mm. broad: petals nearly orbicular, 

 longer than the sepals: fruit hemispherical, the akenes sunk in shallow pits. 

 Thatuna Hills, common; rare away from the timber. 



F. bracteata Heller. Rootstocks stout: scapes 10-20 cm. high, usually ex- 

 ceeding the leaves: whole plant sparsely silky-villous: leaflets broadly obo* 



