Mustard Family 169 



form with several divaricately spreading branches. 

 Flowers small, yellow. Siliques terete, tapering almost 

 from the base to the apex ; stigma slightly 2-lobed. 

 Seeds in 1 row in each cell. A monotypic genus as here 

 understood. 



1. E. officinale L. Stems 3-6 dm. high; basal leaves lyrately 

 and somewhat runcinately pinnatifid, 7-15 cm. long, the upper 

 shorter, lanceolate, subentire or hastate; pods 1 cm. long, nearly 

 sessile, erect and closely appressed to the rachis. (Sisymbrium 

 officinale Scop. 



Common along streets and in waste places. Native of Europe. 



7. DIPLOTAXIS DC. SAND ROCKET. 



Erect annual or perennial herbs with pinnatifid or 

 lobed leaves and rather large yellow flowers in terminal 

 racemes. Silique elongated linear flat or flattish, short 

 beaked or beakless ; valves mostly 1-nerved. Style slen- 

 der. Seeds in 2 rows in each cell, marginless. Cotyle- 

 dons conduplicate. 



1. D. tenuifolia (L.) DC. Annual, branched from the base, 

 sparingly hispid or glabrous, the slender branches 3-6 dm. high, 

 leafy only below ; leaves oblanceolate, sinnuate-lobed or some- 

 times pinnatifid, 5-10 cm. long, narrowed at the base, mostly 

 slender-petioled ; fruiting racemes long, loose ; flowers 12-16 mm. 

 broad ; pod about 3 cm. long, 2 mm. wide, erect, flattish ; fruiting 

 pedicel 18-30 mm. long. 



Occasional along ditches about Los Angeles, Pasadena and Santa Ana. 

 Native of Europe. 



8. BBASSICA L. MUSTARD. 



Erect branching annual or biennial herbs, with pin- 

 natifid basal leaves, those of the stem dentate or often 

 nearly entire, and showy yellow flowers in elongated 

 racemes. Siliques elongated, sessile on the receptacle, 

 terete or 4-angled, tipped with a persistent usually 

 1 -seeded beak ; valves 1-3-nerved ; stigma truncate or 



