138 MONTANA AGRICULTURAL COLLEGE SCIENCE STUDIES. 



Sisymbrium incisum, Engelm. and S. canescens, Nutt. Tansy Mus- 

 tard. 



Sisymbrium officinale, Scop. Hedge Mustard. 



Sisyrinchium spp. Blue-eyed Grass. 



Smilacina spp. False Solomon's Seal ; Wild Lily of the Valley. 



Solanum nigrum, L. Deadly Nightshade. 



Solanum triflorum, Nutt. Stinkweed ; Wild Potato ; Wild Tomato ; 

 Ground Cherry. 



>1: Sonchus asper, Vill. Yellow Thistle; Sow-thistle. 



Sparganium spp. Bur-reed. 



:; Spergula arvensis, L. Spurry. 



Steironema ciliatum, Raf. Snake-root. 



*Stellaria media, Smith. Chickweed. 



Stipa comata, F. & R. and S. spartea, Trin. Spear Grass ; Porcupine 

 Grass ; Devil's Darning-needles. 



Symphoricarpus occidentalis, Hook. June Berry; Buckbush; Stag- 

 berry ; Partridge-berry. 



*Symphytum officinale, L. Comfrey. 



Synthyris rubra, Benth. Kitten-tails. 



Taraxacum officinale, W r eber. Dandelion. 



Taxus brevifolia, Nutt. Ground Hemlock ; Yew. 



Tellima parviflora, Hook. Star-flower; Prairie Star. 



Thermopsis montana, Nutt. Yellow Snapdragon. 



Thermopsis rhombifolia, Nutt. Prairie Bean ; Yellow Pea. 



Thlaspi alpestre, L. Sweet Alyssum. 



*Thlaspi arvense, L. Pennycress. 



Thuja plicata, Don. White Cedar; Cedar. 



Townsendia Parryi, Eaton. Spring Daisy ; Daisy. 



:: Tragopogon porrifolius, L. Salsify ; Oyster Plant. 



Trifolium Rydbergii, Greene. Sweet Clover. 



Trifolium spp. Wild Clover, Mountain Clover. 



Trillium ovatum, Pursh. Tril-lium ; Wake Robin. 



Tsuga heterophylla, Sargent. Hemlock. 



Typha latifolia, L. Cat-tail; Cat-tail Flag; Bulrush. 



Ulmus Americana, L. Elm ; White Elm. 



*Urtica gracilis, Ait. Nettle ; Stinging Nettle. 



Vaccinium membranaceum, Dougl. Huckleberry. 



Vaccinium scoparium, Leiberg. Red Huckleberry; Grouse-berry. 



Valeriana edulis, Nutt. Tobacco Root. 



*Verbascum Blattaria, L. Moth Mullein. 



*Verbascum Thapsus, L. Mullein. 



