MUSTARD FAMILY 27 



1. Leaves pinnate to bipinnate 



a. Seeds in 1 row in each half of the pod 5\ incisum 



b. Seeds in 2 rows S. pinndtum 



2. Leaves pinnatifid or entire 



a. Leaves pinnatifid, the segments broad ; weeds S. ofhcinale 



b. Leaves mostly entire, leaves or segments linear ; . 



native 5*. linifolium 



SMELOWSKIA C. A. Meyer 1831 



(Named for Smelowski, a Russian botanist) 



PL 6, fig. 21-22. 



Sepals 4, petals 4, white or pink, stamens 6, pods lance-oblong, flattened 

 at right angles to the partition, but appearing 4-angled, few-seeded, style 

 short or none ; flowers in corymbs or racemes ; leaves pinnatifid, hairy, often 

 hoary ; tufted perennials. 



Stems 2-8 in. high ; leaves mostly basal, leaflets linear 

 to ovoid S. calycina 



STANLEYA Nuttall 1818 STANLEYA 



(Named for Lord Stanley) 



PI. 6, fig. 37. 



Sepals 4, yellow or yellowish, petals 4, yellow to creamy or greenish, 

 stamens 6, pod long, linear, roundish in section, long-stalked; flowers in 

 long racemes ; leaves extremely variable, from entire to pinnatifid or even 

 pinnate; perennial. 

 Leaves entire to pinnatifid or pinnate, smooth or 



hairy ; flowers yellow to creamy or greenish-yellow S. pinnatifida 



STENOPHRAGMA Celakovsky 1877 



(Gr. stenos, narrow, phragma, partition) 



PL 6, fig. 40. 



Sepals 4, petals 4, white, stamens 6, pod linear, somewhat 4-angled, 

 seeds in 1 or 2 rows, style short, stout; flowers in racemes; leaves toothed 

 or entire ; rosette biennial. 



Stems hairy; stem leaves clasping, entire, rosette 

 leaves toothed S. virgdtum 



