168 CAPPARIDACEAE. 



Family 60. CAPPARIDACEAE Lindl. CAPER FAMILY. 



Pods elongated ; receptacle with an appendage or gland. 



Appendage tubular ; petals cuneate-flabelliform, 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. 



i. 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 Canon; Poudre Canon. 



3. PERITOMA DC. 



Petals yellow. i. p, lutewn. 



Petals purple, pink or white. 



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



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



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



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



1. 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. 



2. 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. 



