472 MEMOIRS OF THE XEW YORK BOTANICAL GARDEN. 



Montana: Columbia Falls, 1892, R. S. Williams; 1894, P^^/ 

 Stanton Lake, 1894, Williams. 



On page 102, before IRIDACEAE, insert: 

 *Trillium ovatum Pursh, Fl. Am. Sept. 245 [Bot. Cal. 2: 181]. 



This species is characterized by its purplish or dark rose-colored 

 acute petals, narrow sepals, and very slender peduncles. 



Montana: Columbia Falls, 1893, R. S. Williams. 



Among the specimens cited under Sisyrinchium angustifolium, 

 omit West Gallatin River, 1883, Scridner, 2/1, and add after the 

 same : 



* Sisyrinchium occidentale Bicknell, Bull. Torr. Bot. Club, 26 : 448. 



Differs from S. angustifolium in the much less elongated outer 

 bract and larger interior scales, more narrowly winged stem, con- 

 stricted below the frequently deflected spathes, larger flowers, and 

 apparently smaller fewer-seeded capsules. 



Montana: West Gallatin River, 1883, Scribner ; Helena, 1888, 

 F. D. Kelsey. 



Yellowstone Park : 1894, Mrs. Moore; Mammoth Hot Springs, 

 1894, F. H. Burglehaus ; 1889, F. W. Dczvart. 



On page 109, before SALICACEAE, insert: 

 DICOTYLEDONES. 



On page 114, before Salix striata, insert: 



* Salix Sitchensis Sanson ; Bong. Mem. Acad. Petersb. 2 : 162 [Bot. 



Cal. 2: 87]. 



Somewhat like S. stricta, but larger, 2-4.5 m. high ; aments long, 

 with a few leafy bracts below ; leaves longer and with a very tine silky 

 tomentum beneath. 



Montana: Columbia Falls, 1893, R. S. Williams, gj2. 



On page 129, before Polygonum Nuttallii, insert: 

 Polygonum minimum Wats, King's Exped. 5:315 [Man. R. M. 318 ; 

 Bot. Cal. 2 : 11]. 



In poor soil, at an altitude of about 1300 m. 

 Montana: Essex, 1896, R. S. Williams. 



On page 139, before Montia perfoliata, insert: 



* Montia parvifolia (Moc;.) Greene, Fl. Fran. 181 [Syn. Fl. i' : 



275] ; Claytonia -pai'vifolia Moc. ; DC- Prod, 3: 361. 



