100 CRUCIFERAE 



1. C. Pennsylvanica Muhl. 8'-2 high, leafy : leaves pinnatifid, of 

 3-8 pairs of toothed oblong leaflets : flowers 2 7/ broad. In bogs along 

 the bluffs west of Sibley. Uncommon. April-May. 



2. C. parviflora L. 2 / -5 / high, very delicate and weak : leaves of 1-5 

 leaflets, the terminal orbicular, the lateral oblong to linear : flowers 1" 

 broad. On mossy rocks in ravines west of Lee's Summit. Rare. April- 

 May. 



3. C. arenicola Britton. 4 / -12 / high, much branched and leafy : 

 leaves of 3-5 pairs of entire or sparingly toothed linear leaflets : flowers 

 1 // -2 // broad. Wet sandy prairies near Dodson and Grain Valley. Fre- 

 quent. April-May. 



4. C. bulbosa (Schreb.) B.S.P. 1 high : basal leaves orbicular, the 

 cauline oblong to lanceolate, toothed or entire : flowers 5 // -7 // broad. 

 In bogs near Courtney and Little Blue Tank. Rare and local. May- 

 June. 



10. DENTARIA L. 



Plants from deep-seated scaly or toothed rootstocks, bearing about three 

 3-divided and subverticillate leaves below the floral raceme. Pods linear, 

 flat, with seeds in one row in each cell. Cotyledons accumbent. 



1. D. laciniata Muhl. PEPPER ROOT. 1 high : leaflets lanceolate, 

 the lateral usually two-cleft, and all cut-toothed : flowers white to pink- 

 ish, 7 7/ broad. Rather common in moist woods throughout. April-May. 



11. BURS A Weber. 



Flowers white. Pods compressed contrary to the partition. 



1. B. Bursa-pastoris (L.) Britton. SHEPHERD'S PURSE. 6 x -2 high, 

 slightly pubescent : root-leaves pinnatifid, the cauline lanceolate, sagit- 

 tate-clasping and sparingly dentate. A very common weed. April- 

 October. 



12. CAMELINA Crantz. FALSE FLAX. 



Annuals with yellowish flowers, and pear-shaped pods, pointed by the 

 persistent style. 



Pods 2 // -3 // long. 1. C. microcarpa. 



Pods 4" long. 2. C. saliva. 



1. C. microcarpa Andrz. l-2 high, hirsute below : leaves lanceo- 

 late, sagittate-clasping, nearly entire : pods 2 // -3 // long. Adventized 

 along the Santa Fe Railroad east of Sheffield. Common in one locality. 

 Also near Morris, Kansas. May-June. 



2. C. sativa Crantz. Like the last but whole plant glabrate, pods 

 larger and racemes shorter. Rarely occurs at Sheffield. June. 



13. DRABA L. WHITLOW GRASS. 



Stellate-pubescent annuals with entire or toothed leaves and linear to 

 linear-oblong nerveless pods. Seeds in two rows in each cell. 



