CAPPARIDACEJE. (CAPER FAMILY.) 27 



20. BISCUTELLA, 1 L. 



Erect stellate-pubescent branching herbs, with entire or pinnatifid leaves, 

 and yellow or purplish flowers. 



1. B. Wislizeni, Benth. & Hook. A foot or more high, covered 

 throughout with a fine, but dense, stellate pubescence: leaves linear-lanceolate 

 to broadly lanceolate, entire, slightly undulate or deeply pinnatifid : each half 

 of the pod roundish. — Dilhyrwa Wislizeni, Engelm., of the various Western 

 reports. S. VV. Colorado, Brandegee, to Arizona and Texas. 



Order 7. CAPPARIDACE^:. (Caper Family.) 



Herbs, with alternate leaves and perfect hypogynous flowers, sepals 

 and petals as in Cruciferce, stamens 6 or more, nearly equal in length, 

 pod one-celled with 2 parietal placentae and kidney-shaped seeds, the 

 embryo incurved rather than folded. 



# Stamens 8 to 32. 



1. Polanlsia. Flowers whitish or purple. Pod elongated. 



* * Stamens 6. 



2. Cleome. Flowers yellow or pink-purple. Pod oblong or linear, many-seeded. 



3. Cleomella. Flowers yellow. Pod rhomboidal, 2-horned or globular, few-seeded 



1. POLANISIA, Raf. 



Sepals sometimes united at base. Petals with claws and emarginate. Pod 

 compressed or cylindrical, many-seeded. — Annual herbs, ill-scented and mostly 

 glandular, with 3-foliolate petioled leaves, and flowers in leafy bracted racemes. 



1. P. trachysperma, Torr. & Gray. Leaves with 3 lanceolate leaflets; 

 floral bracts mostly simple : petals with slender claws as long as the sepals : 

 stamens 12 to 16, exserted : pod very rarely on a short slender stipe : seeds finely 

 pitted and often warty. — P. uniglandulosa of the Fl. Colorado and Bot. King's 

 Exp. Colorado and Wyoming to the Columbia River, and eastward to Kan- 

 sas and Texas. 



2. P. graveolens, Raf. Leaves with 3 oblong leaflets: flowers small: 

 calyx and filaments purplish: petals yellowish-white: stamens about 11, scarcely 

 exceeding the perals : pod slightly stipitate. — Upper Arkansas Valley, Colorado, 

 and eastward across the continent. 



2. CLEOME, L. 



Sepals sometimes united at base. Pod stipitate, many-seeded. — Erect 

 branching annuals, with palmately 3 to 7-foliolate leaves, flowers in bracteate 

 racemes, and pods pendent on spreading pedicels. 



1 Raphanus sativus, L., is more or less hispid, with purple or rose-colored flowers, and 

 an inflated long-pointed pod. — The common Radish, running wild in cultivated grounds. 



