74 Order CARYOPHYLLACEA 
4. Arabis glabra (L.) Bernh. 
In the western part of the state. Dismal river; Long Pine. 
5. Arabis holboellii Hornem. 
In the foot-hill regions of the western part of the state. Banner 
county; Dawes county; Ft. Robinson. 
19. Erysimum., 465. 
Flowers 4-5 mm. high. 
Pods less than 3 cm. long, pedicels slender. 1. E. cheiranthoides. 
Pods 3 cm. or more long, pedicels stout. 3. E. repandum. 
Flowers about 8-20 mm. high. 
Flowers about 8 mm. high. 2. E. inconspicuum. 
Flowers 12-20 mm. high. 4, E. asperum. 
1. Erysimum cheiranthoides L. Worm-seed Mustard. 
Introduced over most of the state. Dismal river; Lincoln; Loup 
City; Pine Ridge; St. James; Valentine; Wahoo. 
2. Erysimum inconspicuum (S. Wats.) MacM. 
Introduced but not common. Lincoln. 
3. Erysimum repandum L. 
Long Pine. 
4, Erysimum asperum DC. 
Common in the western part of the state. Box Butte county; Chad- 
ron; Deuel county; Ft. Robinson; Kimball; Pine Ridge; Valentine. 
20. Alyssum. 466. 
1. Alyssum alyssoides L. Alyssum. 
Sometimes escapes from cultivation. Fairbury; Plainview. 
21. Conringia. 467. 
1. Conringia orientalis (L.) Dumort. Hare’s-ear Mustard. 
Introduced from the west. Lincoln. 
22. Berteroa. 466. 
1. Berteroa incana (L.) DC. Hoary Alyssum. 
Introduced in grass and alfalfa seed. Bethany; Plainview. 
5. RESEDACEZ. 
1. Reseda. 469. 
1. Reseda lutea L. ; Mignonette. 
Rarely escapes from cultivation. Weeping Water. 
CARYOPHYLLALES. 
Trees or shrubs; flowers dicecious, in aments. 2. Salicacez. 
Herbs or vines, sometimes woody at the base; flowers not in aments. 
Fruit a capsule, dehiscent by valves or teeth, or circumscissile. 
Ovary one-celled. 
Sepals 5 or 4; nodes usually swollen. 1. Caryophyllacez. 
Sepals 2; leaves usually succulent. 4. Portulacacee. 
Ovary 2-several-celled. 
Petals present; hydrophytes. 3. Elatinacez. 
Petals wanting; plant prostrate, spreading. 5. Aizoacez. 
