372 DROSERACEAE 



1. C. platycarpa (Torr.) Greene. Stem 3-5 dm. high; leaflets 3, oval or 

 oblong, petiolulate, 1.5-4 cm. long;_ bracts unifoliolate, petioled, elliptic; sepals 

 linear-subulate; petals golden yellow, 6-7 mm. long; stipe of the fruit 10-15 mm. 

 long; body elliptic, 12-15 mm. long, 6-7 mm. wide, pubescent; style slender, 3 

 mm. long. Cleome platycarpa Torr. Alkaline and lava soil: Ore.^ — Ida. — Nev. 

 — n Calif. Son. My-Je. 



5. CLEOMELLA DC. 



Glabrous annuals. Leaves alternate, without stipules, digitately trifoliolate, 

 petioled. Flowers small, yellow, in terminal bracted racemes, nearly regular. 

 Receptacle elongate, without appendage. Sepals 4, distinct, thin, imbricate, 

 deciduous. Petals 4, entire, sessile, deciduous. Stamens 6; filaments filiform, 

 equal, distinct. Capsule short, broader than long, inflated, with two helmet- 

 like valves. Seeds usually 2 on each placentae, pendulous. 



Stipe longer than the pod; leaflets linear to oblong. 



Seeds rugose or tessellate; leaflets Unear; pod rhombic. 



Petals 3-5 mm. long; pod about 6 mm. wide; seed transversely rugose. 



1. C. angustifolia. 

 Petals 2-3 mm. long; pod 3—4 mm. wide; seed tessellate. 2. C. plocosperma. 



Seeds smooth and unmarked. 



Pod broadly rhombic; leaflets oblong or oblanceolate. 



Stem 2-3 dm. loigh; pod with sharp angles. 3. C. cornuta. 



Stem less than 1 dm. high; pod with rounded angles. 4. C. nana. 



Pod ovate; leaflets linear. 5. C. oocarpa. 



Stipe shorter than the pod; leaflets oval or broadly oblong. 6. C. Palmerana. 



1. C. angustifolia Torr. Stem glabrous, branched, 3-6 dm. high; leaflets 

 acuminate or acute, 3-4 cm. long; sepals lanceolate, 1 mm. long; petals yellow, 

 5 mm. long, oblanceolate; pedicels ascending, 10-15 mm. long; stipes spread- 

 ing, 5-6 mm. long; body of the pod rhombic, about 5 mm. long, 6 mm. broad, with 

 rounded angles. River valleys and plains: Neb. — Tex. — Utah. Plain — Son. 

 Jl-S. 



2. C. plocosperma S. Wats. Stem 3-5 dm. high, diffusely branched; leaf- 

 lets 3, linear, 1-2 cm. long; sepals ovate, 0.5 mm. long; petals yellow, 4 mm. long; 

 pedicels divaricate, 6-8 mm. long; stipe 3-5 mm. long; bod}' of the pod rhombic, 

 3-4 mm. long and as wide. Desert regions: Utah — Nev. Son. Jl-S. 



3. C. cornuta Rydb. Stem 2-3 dm. high, branched below, glabrous; leaf- 

 lets 1-2 cm. long, oblong or oblong-oblanceolate, obtuse, mucronate; sepals 

 ovate, cuspidate; petals light yellow, narrowly oval, clawless, about 3 mm. long; 

 pedicels very slender, ahnost 1 cm. long; pod broadly rhombic, about 3 mm. 

 long and 4 mm. broad, the corners often produced into short processes; stipe 

 6-8 mm. long. Dry places: Utah. Son. Jl. 



4. C. nana Eastw. Stems 3-8 cm. high, simple or branched from the base; 

 leaflets 6-10 mm. long, entire; pedicels 5-10 mm. long; sepals subulate-aristate; 

 petals yellow, oval, 4.5 mm. long, obtuse; stipe deflexed, 6 mm. long; pod rhom- 

 bic, 4 mm. long, 5 mm. wide. Dry regions: Utah. Son. My. 



5. C. oocarpa A. Gray. Stem diffusely branched, 2-3 dm. high; leaflets 

 linear, obtuse, 1-3 cm. long; petals yellow, 6 mm. long; pedicels 6 mm. long; 

 stipe about 6 mm. long; pod ovate, 4 mm. long and about as wide. Arid regions: 

 Colo.— Nev. Son. 



6. C. Palmerana M. E. Jones. Stem 5-25 cm. high, branched from the 

 base; leaflets obtuse, 1-2 cm. long; pedicels 6-8 mm. long, reflexed; petals orange, 

 4 mm. long, oblong-oblanceolate; stipe 2 mm. long; pod 4-5 mm. long, 8-10 mm. 

 wide; seeds smooth, spotted. (?) C. Montrosae Payson. Dry regions: Utah — 

 Colo. Son. My. 



Family 54. DROSERACEAE. Sundew Family. ' 



Mostly subacaulescent herbs, with glandular-viscid leaves, which are 

 either filiform and circinate in the bud or with broadened sensitive blades. 

 Flowers perfect, regular, racemose or spicate. Sepals 4-8, imbricate. 



I 



