140 Flora of the Palouse Region 



the apex: capsules globose, 2-celled, or imperfectly 4-celled by 

 false partitions between the two seeds or by abortion i-celled. 



Calyx with two large bracts at base. C. SEPIUM. 



Calyx not bracted. C. arvensis. 



C. sepium L. Usually glabrous, climbing over shrubs to a height of 2-3 

 m.: leaves sagittate or somewhat hastate, acuminate, 2-5 cm. long; basal lobes 

 entire or angularly 2-lobed: peduncles nearly as long as the leaves: calyx 

 enclosed by two large ovate bracts: corolla white, sometimes pink, 4-6 cm. 

 long: stigmas capitate, oval or oblong. Banks of Snake River. 



C. arvensis L. Stems prostrate, trailing, 30-120 cm. long: whole plant 

 pubescent: leaves oblong or ovate, obtuse or acute, 1-4 cm. long, sagittate or 

 hastate or auricled at base; petioles 1-2 cm. long: peduncles longer than the 

 leaves, mostly 1-2-fiowered: pedicels each with two small bracts: corolla 

 pinkish, 1-2 cm. long: stigmas thread-like. A troublesome weed, as yet 

 sparingly introduced. 



Family 63. POEEMONIACEAE. 



Herbs: leaves alternate or opposite, simple or divided, without 

 stipules: flowers regular, perfect, 5-merous, except the pistils: 

 corolla garnopetalous, convolute in the bud; lobes not plaited: 

 stamens epipetalous, alternate with the corolla-lobes, distinct: style 

 3-lobed: ovary 3-celled: capsule 3-celled, 3-valved, the valves usu- 

 ally breaking away from the triangular central column: seeds few- 

 man)'; seed-coats when wetted commonly becoming mucilaginous 

 and developing spiricles; endosperm flesh}-. 



Leaves opposite, entire: corolla salverform; limb widely spreading. 



233. PHLOX. 

 Leaves alternate, or rarely opposite, entire or finely divided: corolla funnel- 

 form or tubular: limb little spreading. 234. gilia. 

 Leaves alternate, pinnate or pinnately divided: corolla rotate. 



235. POLEMONIUM. 



233. PHLOX. 



Perennial herbs or suffrutescent plants: leaves opposite, sessile, 

 entire: flowers in cymes, terminal or in the upper axils, mostly 

 bracted: calyx narrow, 5-cleft: corolla salverform with along tube, 

 a narrow opening and broad or rounded lobes: stamens included, 

 very unequally inserted on the upper part of the corolla-tube: 

 ovules 1 or sometimes 2: capsules ovoid, with but one seed in each 

 cell. 



Style slender, nearly as long as the corolla-tube. P. linearikoeia. 



Style short, not as long as the ovary. P. speciosa. 



P. linearifolia Gray. Perennial, woody and loosely branched at base, 

 the branches erect or nearly so, 10-30 cm. high, glabrous or puberulent: 



