100 CRUCIFERAE 



1. C. Pennsylvanica ]\Iuhl. 8'-2° high, leafy : leaves pinnatifid, of 

 3-8 pairs of toothed oblong leaflets : flowers 1" broad. — In bogs along 

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



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

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

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

 May. 



3. C. arenicola Britton. \'-V2/ high, much branched and leafy : 

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

 \"-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 W-l" 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, 1" broad. — Rather common in moist woods throughout. April-May. 



11. BURSA Weber. 



Flowers white. Pods compressed contrary to the partition. 



1. B. Bursa-pastoris (L.) Britton. Shepherd's Purse. 6^-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. sativa. 



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. — I\arely occurs at Sheflield. 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. 



