Flora of the Palousc Region 123 



petioled, glabrous or puberulent, 2-6 cm. long: flowers red, in corymb-like 

 racemes: petals about 20 mm. long, the broad blades 3-lobed, the long claw 

 with a slender tooth on each side: inner four anthers rudimentary: stigma- 

 lobes much dilated: capsule oblong, truncate at apex, 2-3 cm. long, puberu- 

 lent. stowt-pedicelled. Everywhere common. 



C. rhomboidea Dougl. Slender, erect, usually simple, 15-60 cm. high, 

 puberulent: leaves broadly lanceolate, acute at each end, entire, 1-4 cm. 

 long, slender-petioled: flowers few, scattered: petals rhomboidal, entire, 

 about 1 cm. long, the claw often toothed: stamens all perfect", filaments with 

 hairy scales at base: capsules stout, 4-angled, acuminate, nearly sessile, 2-3 

 cm. long. Dry woods, Thatuna Hills. 



200. BOISDUVALIA. 



Erect leafy annual herbs: leaves alternate, sessile, simple: flow- 

 ers small, in leafy simple or compound spikes: calyx-tube funnel- 

 form above the ovary, 4-lobed: petals 4, 2-lobed, purple or white: 

 stamens 8, those opposite the petals shorter; anthers attached near 

 their bases, erect: ovary 4-celled, several-ovuled; capsule mem- 

 branaceous, ovate-oblong to linear, nearly terete, acute, sessile, 

 dehiscent to the base; seeds 3-8, in one row in each cell. 



Leaves all alike, toothed, ovate-lanceolate. B. glabella. 



Leaves all alike, nearly entire, narrowly lanceolate. B. torreyi. 



Floral leaves broader than the lanceolate lower ones. B. dkxsiilora. 



B. glabella YValp. Erect and simple or more commonly branched at 

 base and decumbent, 10-30 cm. high, leaf}-, densely villous to glabrous: 

 leaves all alike, ovate-lanceolate, acute or acuminate, serrate or dentate. 

 1-2 cm. long: flowers sessile in the upper axils, occasionally also in the 

 lower ones, shorter than the leaves: corolla purplish, 2 mm. long, capsules 

 fusiform, tapering from a broader base, 6-7 mm. long, the partitions adher- 

 ent to the valves: seeds 4-6 in each cell, somewhat fusiform. Common in 

 the bottoms of dried ponds. Puzzling intermediate forms occur between 

 this and the next species. 



B. torreyi Wats. Erect, simple or rarely branched below, villous through- 

 out, 30-40 cm. high: leaves all alike, lanceolate, acute, entire or denticulate, 

 2-3 cm. long: flowers in the axils of the upper leaves and occasionally of the 

 lower also: corolla 2-3 mm. long, purplish: capsules slender, acuminate, 

 S-10 mm. long; partitions adherent to the valves: seeds. 6-8 in each cell. 

 (Growing with the preceding and in similar places. 



B. densiflora Wats. Erect, simple or with a few branches below, hoary- 

 puberulent throughout or nearly glabrous. 30-90 cm. high: lower leaves lan- 

 ceolate, acuminate, denticulate, 2-6 cm. long; upper leaves gradually broader 

 and shorter, ovate, acuminate, nearly entire, crowded: spikes dense: corolla 

 6-8 mm. broad, purplish: capsules oblong, 5-8 mm. long, the partitions not 

 adherent to the valves in dehiscence; seeds 3-6 in each cell. Common in low- 

 ground, variable. 



201. PACHYLOPHUS. 



Perennial acaulescent or nearly acaulescent herbs; leaves basal, 

 pinnatifid or pinnately-toothed, petioled: flowers basal, more or 

 less tufted: calyx-tube linear-funuelform; segments narrow, one- 



