312 The Ohio Journal of Science [Vol. XVII, No. 8, 



1. Berteroa DC. Berteroa. 



Annual or perennial, stellate-pubescent, erect herbs, with 

 narrow entire leaves, and white flowers in terminal racemes. 

 Petals bifid. Silicles elliptic, canescent, plump. Seeds several 

 in each cavity, winged. 



1. Berteroa incana (L.) DC. Hoary Berteroa. Pale green, 

 1-2 ft. high, branched above; leaves lanceolate, obtuse, 3^-13^ 

 in. long; racemes elongating, flowers small, numerous. 



Recently introduced from Europe and becoming naturalized 

 in waste places. No specimens. 



2. Koniga Adans. Sweet Alyssum. 



Annual or perennial, weak ascending herbs, slightly pubes- 

 cent, with entire leaves and white flowers in terminal racemes. 

 Hairs of stem and leaves forked. vSilicles oval or orbicular, 

 compressed. Seeds one in each cavity. 



1. Koniga maritima (L.) R. Br. Sweet Alyssum. Slightly 

 hoary, branching, 4-12 in. high; basal leaves oblanceolate; 

 stem-leaves linear, 3^-2 in. long, sessile; flowers small, sweet 

 scented; pods glabrous, nearly orbicular, pointed, ascending. 

 Escaped from gardens. 



Erie County. 



3. Alyssum (Tourn.) L. Alyssum. 



Annual, erect, stellate-pubescent, tufted herbs, with narrow 

 leaves and yellow flowers in racemes. Silicles small, orbicular, 

 compressed. Seeds one or two in each cavity, wingless. 



1. Alyssum alyssoides L. Yellow Alyssum. Dwarf hoary 

 herbs, branching from the base, 3-10 in. high; leaves linear- 

 spatulate, entire, K-IK inches long; flowers pale yellow, small, 

 petals entire, sepals persistent; pods margined. 



In fields and meadows, naturalized from Europe. 



Sandusky County. 



4. Draba (Dill.) L. Whitlow-grass. 

 Annual or biennial low tufted herbs, with stellate-pubescence, 

 simple leaves mostly basal, and flowers in slender racemes. 

 Silicles oval or oblong, flat. Seeds many, in two rows in each 

 cavity, wingless. 



1. Petals bifid, stems scapose. D.verna. 



1. Petals entire, stems leafy below. D. caroliniana. 



