MUSTARD FAMILY 25 



(2) All or nearly all the leaves pinnatifid ; pods 



ovoid L. montdnum 



2. Stamens 2, rarely 4 



a. Pods hairy L. lasiocdrpum 



b. Pods smooth or nearly so 



(1) Petals typically present L.virginicum 



(2) Petals tiny or none L. apetalum 



LESQUERELLA Watson 1888 BLADDER POD 



(Named for Lesquereux, an American botanist) 



PI. 6, fig. 9-10. 



Sepals 4, petals 4, yellow, stamens 6, pod globose to ovoid or oblong, 

 slightly inflated, hairy or smooth, few-seeded, style long, persistent; flowers 

 densely corymbose; leaves densely gray-stellate hairy, entire; biennial or 

 perennial. 



1. Pods hairy 



a. Pods globose; leaves linear to spatulate or 



obovate L. argentea 



b. Pods ovoid to oblong 



(1) Plant tufted, 1-3 in. high; leaves usually 



linear L. dpina 



(2) Plant spreading, stems 3-10 in. long; 



leaves spatulate to obovate L. montdna 



2. Pods smooth, globose; leaves linear, lanceolate, 



spatulate -or ovate L. Fen dleri 



PHYSARIA Gray 1871 BLADDER POD 



(Gr. physa, pair of bellows, bubble, from the pods) 



PL 5, fig. 7; pi. 6, fig. 15-16. 



Sepals 4, greenish yellow, petals 4, yellow, rarely cream-colored, 

 stamens 6, pod inflated into two globoid halves, often large and bladder- 

 like, each 1-2-seeded, style long, slender, persistent; flowers in dense 

 corymbs ; leaves thickish, gray-hairy or densely gray-felted, the basal in 

 a dense rosette, spatulate, ovoid, rhombic, or fiddle-shaped, entire or lobed, 

 stem leaves lanceolate to lance-ovate or spatulate; rosette perennials. 

 Stems few to many, prostrate; pod halves 5-15 mm. 



diam. P. didymocdrpa 



