168 CAPPARIDACEAE. 



Family 60. CAPPARIDACEAE Lindl. Caper Family. 



Pods elongated ; receptacle with an appendage or gland. 



Appendage tubular ; petals cuneate-flabelliforra, laciniate, very unequal. 



I. Cristatella. 

 Appendage solid ; petals entire, emarginate or 3-toothed, but not laciniate. 

 Stamens 12-24 ; capsule sessile or short stipitate. 2. Polanisia. 



Stamens 6 ; capsule long-stipitate. 3. Peritoma. 



Pods short, broader than long, more or less flattened contrary to the partition ; 

 receptacle without appendage. 4. Cleomella. 



I. CRISTATELLA Nutt. 



1. Cristatella Jamesii T. & G. In sandy soil from Neb. and Colo, to Tex. 

 — Sterling, Logan Co. 



2. POLANISIA Raf. 



I. Polanisia trachysperma T. &. G. In sandy soil from Ass. to Tex. and 

 Nev. — Alt. 4000-7000 ft. — Canon City; plains and foot-hills near Boulder; 

 New Windsor, Weld Co. ; Ft. Collins ; Salida ; Howe's Gulch ; Mason's river- 

 front farm; Rocky Ford; Soldier Cafion; Poudre Caiion. 



3. PERITOMA DC. 



Petals yellow. 1. P. luteuin. 



Petals' purple, pink or white. 



Petals 8-12 mm. long, usually 3-toothed. 



Stamens exserted ; petals usually rose color or purplish. 2. P, serrulatuni. 



Stamens included; petals white, 3. P. inornatum. 



Petals about 4 mm. long, entire. 4. P. Sonorae. 



I. Peritoma luteum (Hook.) Greene. {Cleome lutea Nutt.) In sandy soil 

 from Wyo. and Wash, to Colo., Ariz, and Ore.— Alt. 4000-8000 ft. — Grand 

 Junction ; Cimarron and Squaw Hill ; Gunnison Valley, above Delta. 



IS. Peritoma serrulatum (Pursh) DC. {Cleome serrulata Pursh.) In val- 

 leys, especially in light or sandy soil, from Sask. and Ida. to Mo. and Ariz. 

 — Alt. 4000-9000 ft. — Boulder; Colorado Springs; Gunnison; Sapinero; Du- 

 rango; Manitou; along Uncompahgre River, near Ouray; Crow Creek; along 

 Platte River, Denver; Ft. Collins; Poudre flats, north of Ft. Collins; Trini- 

 dad; near Badito, between La Veta and Gardner; Sangre de Cristo Creek; 

 Redstone; Pueblo; Dixon Canon; Ft. Collins; Cache la Poudre; Walsen- 

 burg; Manitou. 



3. Peritoma inornatum Greene. In dry soil in western Colo. — Grand 

 Junction. 



4. Peritoma Sonorae (A. Gray) Rydb. (Cleome Sonorae A. Gray.) In 

 saline soil from Colo, to N. M. and Sonora. — Alt. 4000-5000 ft. — Saguache; 

 San Luis; Alamosa. 



4. CLEOMELLA DC. 



Capsule rhomboidal with more or less distinct conical or horn-like projections; 



stipe shorter than the pedicels ; style obsolete ; seeds rugulose. 



I. C. angustifolia. 

 Capsule obscurely rhomboidal, merely gibbous on the back ; stipe equalling the 



pedicels ; style conspicuous ; seeds smooth and shining. 2. C. oocarpa. 



