Family CRUCIFERA 73 
14. Bursa (Capsella). 459. 
1. Bursa bursa-pastoris (L.) Britton. Shepherd’s-purse. 
A common weed in the eastern part of the state. Fairbury; Ft. 
Robinson; Lincoln; Valentine. 
15. Camelina. 459. 
1. Camelina sativa (L.) Crantz. False Flax. 
Common over most of the state. Broken Bow; Crete; Lincoln; Pine 
Ridge; Valentine; Weeping Water. 
16. Draba. 460. 
Petals white or wanting; stems leafy only below. 1. D. caroliniana. 
Petals yellow, fading to whitish, notched. 2. D. nemorosa. 
1. Draba caroliniana Walt. Whitlow Grass. 
Common all over the state. Crookston; Fairbury; Lincoln; Minden; 
Nebraska City; Neligh; Red Cloud; Valentine; Weeping Water. 
2. Draba nemorosa L. 
In the western part of the state. Alliance; Ft. Robinson; Rushville. 
17. Sophia (Sisymbrium). 462. 
Seeds in one row in each cell of the pod. 
Pods 15-25 mm. long, 1 mm. wide. 1. S. sophia. 
Pods 8-14 mm. long, 2 mm. wide. 3. S. incisa. 
Seeds in two rows in each cell of the pod; pods 5-8 mm. long. 
2. S. pinnata. 
1. Sophia sophia (L.) Britton. 
Ewing; Greeley; Ord; Springview. 
2. Sophia pinnata (Walt.) Britton. Tansy Mustard. 
Chadron; Lincoln; Merriman; Ponca; Wahoo; Whitney. 
3. Sophia incisa (Engelm.) Greene. 
Probably occurs all over the state. Weeping Water; Wild Cat moun- 
tains. 
18. Arabis (Including Turritis). 463. 
Rock-cresses. 
Base of stem-leaves auricled, clasping. 
Seeds in one row in each cell of the pod. 
Pedicels 2-4 mm. long, pods spreading. 1. A. dentata. 
Pedicels 6-12 mm. long, pods nearly erect. 2. A. hirsuta. 
Seeds in two rows in each cell of the pod. 
Pods erect, 5-8 cm. long. 4. A. glabra. 
Pods reflexed, 2-5 cm. long. 5. A. holboellii. 
Base of leaves narrowed, not clasping. 3. A. canadensis. 
1. Arabis dentata T. & G. 
In the eastern part of the state. Lincoln. 
2. Arabis hirsuta (L.) Scop. 
Arabis ovata (Pursh) Poir. 
In the eastern part of the state. Lincoln; Nebraska City; Neligh; 
Ponca; Valentine. 
3. Arabis canadensis L. 
In the southeastern part of the state. Nebraska City. 
