Family CRUCIFERZ 69 
3. Cleomella. 468. 
1. Cleomella angustifolia Torr. 
Common in the western part of the state. Camp Clark; Culbertson; 
Julesburg; Lodge Pole creek; North Platte. 
4. Polanisia. 468. 
Flowers 4-6 mm. long, style 2 mm. long. 1. P. graveolens. 
Flowers 8-12 mm. long, style 4-6 mm. long. 2. P. trachysperma. 
1. Polanisia graveolens Raf. Clammy-weed. 
In dry sandy or gravelly places in the western part of the state. 
Atkinson; Belmont; Long Pine; Red Cloud; Valentine. 
2. Polanisia trachysperma T. & G. 
Common in sand draws and other dry, sandy places. Anselmo, Ben- 
kelman; Belmont; Dawes county; Devel county; Niobrara; Pine 
Ridge; Royal; Red Cloud; Thedford. 
4. CRUCIFERZ. (BRASSICACEZ.) 
Mustard Family. 
Pods stipitate (raised on a stalk above the receptacle); anthers 
spirally twisted. 
Stipes several cm. long; flowers yellow. 1. Stanleya. 
Stipes 1 mm. long; flowers pink. 2. Thelypedium. 
Pods not stipitate; anthers not twisted. 
A. Pods compressed or flattened contrary to the narrow partition. 
Cells of pod 1-seeded; pods usually winged, notched at the apex. 
3. Lepidium. 
Cells of pods with 2 to many seeds. 
Flowers white, 1-2 mm. broad. 
Pods winged; foliage in ours smooth. ’ 4. Thlaspi. 
Pods wingless; plant pubescent below. 14. Bursa. 
Flowers yellow, 1 cm. or more broad, foliage stellate canes- 
cent. 12. Physaria. 
B. Pods neither compressed nor flattened contrary to the partition. 
a. Pods terete or tetragonal, not flattened. 
Pods short, rarely more than twice as long as wide. 
. Petals entire. 
Pubescence stellate, seeds flat. 13. Lesquerella. 
Pubescence not stellate. 
Leaves entire or toothed, the upper sessile clasping by 
a sagittate base. 15. Camelina. 
Leaves lobed or pinnatifid, not sagittate. 9. Roripa. 
Petals deeply 2-cleft. 22. Berteroa. 
Pods long, several times as long as wide. 
Pods scarcely beaked, merely tipped by a short style or a 
sessile stigma. 
Pods terete or nearly so. 
Seeds in 2 rows in each cell of the pod. 
Valves of the pod nerveless. 9. Roripa. 
Valves of the pod 1-nerved. 17. Sophia. 
Seeds in one row in each cell of the pod. 
Pubescence of simple hairs, lower leaves runcinate or 
entire. 5. Sisymbrium. 
