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1. E. SATivusL. 0. Common all the year 

 round. 



Escaped from gardens. Originally a native 

 of China, now in cultivation over the whole 

 earth. 



2, Thysanocarpus Hook. 



Indehiscent silicula (samara) orbicular, 

 winged, 1-seeded. 0. Spring. 



1. T. PUSILLUS Hook. Pubescent through- 

 out; cauline leaves lanceolate, sessile, but not 

 clasping; silicula orbicular, hirsute. Niles. 



2. T. LACiNiATUsNutt. Cauline leaves linear, 

 scarcely auricled at their clasping base; sili- 

 cula obovate, slightly pubescent. Niles. 



3. T. CURVIPES Hook. Glabrous; cauline 

 leaves conspicuously auricled at the clasping 

 base; silicula orbicular. Common. 



3, Senebiera Poir. 



Indehiscent silicula (schizocarp) 2-seeded. 

 Seeds globose, rugose. Flowers minute, white. 

 1. S. DIDYMA Pers. 0. Common. Sum- 

 mer. 



4. Lepidium R- Br. PEPPERGRASS. 



Silicula dorsally compressed, ovate, with ca- 

 rinate valves and narrow replum. Seeds soli- 

 tary in each cell, pendulous from the apex of 

 the replum. 



