72 Order RHOEODALES 
1. Roripa sinuata (Nutt.) Hitch. 
A common weed all over the state. Bellevue; Crete; Fairbury; Fre- 
mont; Kearney; Lincoln; Nebraska City; St. James; Whitney. 
2. Roripa obtusa (Nutt.) Britton. ; 
Common in wet ground or shallow water. Big Springs; Crete; Min- 
den; Newark; Red Cloud; Wahoo; Whitman. 
3. Roripa palustris (L.) Bess. 
An amphibious hydrophyte. Common throughout the state. Ewing; 
Indianola; Kearney; Lincoln; St. James; Walton; Whitman. 
4. Roripa hispida (Desv.) Britton. 
Callaway; Kennedy; Lincoln. 
5. Roripa nasturtium (L.) Rusby. Water Cress. 
In shallow water throughout the state. Bellevue; Grand Rapids; 
Lincoln; Squaw canyon; Wahoo creek. 
10. Cardamine. 453. 
Leaves pinnate; plant more or less pubescent. 1. C. hirsuta. 
Leaves simple; plant glabrous. 2. C. bulbosa. 
1. Cardamine hirsuta L. Hairy Bitter-cress. 
In moist places and in streams in the sand-hills. Grand Rapids. 
2. Cardamine bulbosa (Schreb.) B. S. P. Spring-cress. 
In wet places in the eastern part of the state. Burwell; Callaway; 
Fremont; Peru; Richardson county. 
11. Dentaria. 455. 
1. Dentaria laciniata Muhl. Tooth-wort. 
In meadows and wooded bluffs, mostly along the Missouri. Nemaha; 
Peru; Table Rock. 
12. Physaria. 457. 
1. Physaria didymocarpa (Hook.) A. Gray. Double Bladder-pod. 
In the foot-hills, infrequent. Scotts Bluff county. 
13. Lesquerella. 457. 
Bladder-pods. 
Ovary and pods stellate pubescent. 
Lower leaves 1-1.5 cm. long; pedicels 6-12 mm. long. 
1. L. spathulata. 
Lower leaves 5-8 cm. long; pedicels over 15 mm. long. 
2. L. argentea. 
Ovary and pods glabrous. 
Sparingly pubescent; stem much branched. 3. L. gracilis. 
Densely stellate pubescent; stem simple. 4. L. ovalifolia. 
1. Lesquerella spathulata Rydb. 
In the western part of the state. Belmont; Harrison; Whitney. 
2. Lesquerella argentea (Pursh) MacM. 
Common in dry, sandy prairies. Belmont; Box Butte county; Bruns- 
wick; Ewing; Pine Ridge; Sioux county; Weigand; Valentine. 
3. Lesquerella gracilis (Hook.) S. Wats. 
In the southeastern part of the state. Weeping Water. 
4. Lesquerella ovalifolia Rydb. 
In dry soil in the western part of the state. Kimball county. 
