SUPPLEMENT TO THE FLORA OF MONTANA. 85 



5, the lower lateral irregular, 12-14 mm - long, the upper lateral ob- 

 lanceolate, rounded at apex, 6 mm. long, upper (anterior) petal or- 

 bicular to reniform, notched at apex: capsule 18 mm. long, 2-4 wide, 

 irregularly nodulose. 



Near /. aurea, Muhl., but differs from that species in its ovate, 

 serrate-dentate leaves and its smaller spurless flowers, in which it 

 approximates /. aurella, Rydberg but has the saccate sepal very dif- 

 ferent. 



Found in abundance along the damp shady margin of a small 

 stream about half a mile east of Plains, Missoula county, Aug. 9, 

 1901. A similar specimen collected by Dr. Lyall in the "Columbia 

 Valley, 1860" has been referred to /. bi flora by Trelease, as was a re- 

 lated form found on "moist shady banks near the Missouri River, 

 Montana, alt. 3600 ft., Sept. 7; 1883" by F. L. Scribner (No. 18), but 

 this latter specimen does not exhibit the characteristic serrate den- 

 tation of the leaves and has shorter petioles. The altitude given 

 would place this locality in the vicinity of Hilger's at the Gate of 

 the Mountains. [PLATE I, C and D]. 



*Tropaeolum peregrinum, L. Canary-Bird Flower. - Not rare- 

 ly escaped from ornamental cultivation. Helena, E. N. Brandegee. 



LINAGES. 

 Linum rigidum tenerrimum, n. var. 



Tall and slender, diffusely branching above with long internodes, 

 about 3 dm. high: leaves 2-3 cm. long: capsules larger and more 

 -acute : sepals longer, more attenuate and persistent than the type. 



This tall, diffuse form is very different in appearance from the 

 low, rigid, more common plant of the dry upland, but is frequently 

 found with it and intergrades are common. The variety is more 

 usual in low situations. 



Big Horn River, June 15, 1890; Custer Co., July I, 1892, Mrs. J. 

 E. Light ; Wibaux, July 9, 1901 ; Rainbow Falls of the Missouri, 

 July 12, 1888, R. S. Williams, 145 in part. 



*Linum usitatissimum, L. The cultivated flax is fre- 

 quently persistent in old fields. 



Bozeman, July 22, 1898; Wibaux, Aug. 15, 1903. 



EUPHORBIACE^:. 



Euphorbia Arkansana Missouriensis, Norton, Rep. Mo. Bot. 

 Card., 11:104; E. dictyospcrma, Rydberg, Flora, 267, and authors as 

 to the Montana specimens. Frequent in the eastern plains. 



