484 



Cruciferae 



Fumaria 



50 



Map 996 



Corydalis flavula (Raf) DC. 



o 50 



Map 997 



Lepidium campestre (U Br. 



2. Corydalis flavula (Raf.) DC. (Capnoides flavulum (Raf.) Kuntze.) 

 Pale Yellow Corydalis. Map 996. Local in the northern part of the 

 state, becoming rather frequent in some of the Ohio River counties. It 

 is found in rich, moist, sandy soil in woodland, usually on slopes and on 

 the wooded bluffs of streams. 



N. Y., sw. Ont. to Minn., southw. to Va. and La. 



2861. FUMARIA [Town.] L. 

 See excluded species no. 254, p. 1050. 



105. CRUCIFERAE B. Juss. Mustard Family 



[Specimens of this family, in order to make determination certain, should 

 have flowers with the color known, mature pods, and, in some species, 

 the basal leaves. It often happens, however, that one or more of these 

 parts are lacking. In order to compensate for the absence of one or more 

 of these important diagnostic characters, and to employ obvious char- 

 acters, omitting those so often used, such as the position of the cotyledons, 

 the key has been expanded to its present, rather unusual form to make 

 correct determinations possible.] 



A. Flowers white, creamy white, greenish white, or purplish (flowers very small in 

 Lepidium densiflorum) . 



Peduncle 1-flowered, all radical 2971. Leavenworthia, p. 501. 



Peduncles more than 1-flowered. 



Pods transversely divided into 2 cells; plants fleshy, in Indiana found only on the 



shore of Lake Michigan 2920. Cakile, p. 490. 



Pods longitudinally divided into 2 cells. 



B. Pods short, not more than 3-3.5 times as long as wide. 



Pods flattened, if at all, parallel to a septum that is as wide as the pod. 



Pubescence of simple hairs or lacking 2965B. Armoracia, p. 496. 



Pubescence not as above. 



Pods glabrous; seeds in 2 rows in each cell 2989. Draba, p. 502. 



