§4 ' IVyojuing Experiment Station. 



Capsella Bursa-Pastoris, Medic. Pfl. Gatt. i, 85 (1792)- Bursa 

 Bursa- Pastoris, (L ) Weber. 



A weed in lawns and dooryards everywhere; l?niversity Cam- 

 pus, June 1891. 

 lepidium apetalum, Willd. Spec, iii, 439. 



(2uite common on the Laramie Plains, in some places becoming 

 a weed. 



Blue Grass Hills, July 8, 1894 (No. 323); University Campus, 

 July 22, 1895 (No. 1424). 

 Tjepidium montanum, Nutt. T. & G. Fl. i, 116, 669. 



Rare, State Fisji Hatchery grounds, Laramie, B. C. Buffum, 

 1892; Carbon, June 18, 1894 (No. 257), Miss Lily Boyd. 



Xepidium Virginicum, L. Sp. PI. 645 (1753)- 



Occasionally found introduced into lawns and vacant lots. Lara- 

 mie, June 15, 1891, B. C. Buffum. 



'Thlaspi alpestre, L. Sp. PI. ii, 903. 



The typical form of this species is abundant in the Laramie Hills 

 on open hillsides at 7,000-8500 ft. Telephone Canon. May 21, 

 1891, B. C. Buffum; Pole Creek, May 12, 1894 (No. 28). 



Thlaspi alpestre glaucum, n. var. 



The perennial basal part of stem rather freely branched, herba- 

 ceous stems simple and erect, 6-10 inches high; radical leaves 

 broadly to narrowly elliptical, entire or obscurely repand-denticu- 

 late; cauline deltoid-auriculate entire. It also differs from the 

 species in the glaucus hue of the leaves, the laxer inflorescence and 

 ■well marked notch at the apex of the capsule as well as in its hab- 

 itat. The species flowers in early spring on open hillsides; the 

 variety was collected in the forest almost at timber line, growing in 

 the thick beds of Spruce needles. La Plata Mines, August 21, 

 1895 (No. 1777). 



CAPPARIDACE^. 



Cleome integrifolia, T, & G. Fl, i, 142. 



An obnoxious weed, sometimes occupying acres of ground to the 

 exclusion of everything else. Everywhere on the Laramie plains, 

 and. in fact, all over the south-eastern part of the state. Laramie, 

 June 24, 1894 (No. 297). 



