February 15, 1917 ^^^ 



years has caused it to iiniUip^y rapidly . nd results in scores of 

 persons becoming poisontd by it every scison. It is to be hoped 

 that the municipal authoriiies will undertake its extermination 

 within the city limits in the near future. One of the most effec- 

 tive remedies for its poisoning is sweet spirits of nitre as a pre- 

 ventative and Labaracque's solution as an antidote, both to be 

 used externally. Many of the individual shrubs bloom twice in 

 a season, the spring flowers appealing in April, the autumn flow- 

 ers in October. Yellowish-green, iniuute. 



CELASTRACEAE Lindl. Staff tree F^amily. 

 EuoNYMUS [Tourn.] L. Strawberry bush. 

 EuoNYMUS occiDKNTALiS Nutt. Western strawberry bush. 

 Moist creek banks, Balch creek, St. Helens road and on creeks 

 Steven miles cast of Vancouver. May, June. Brownish-purple. 

 ACERACEAE St. Hil. Maple Family. 

 Acer [Tourn.] L. Maple. 

 ACKR MACROPHYLLUM Pursh. Oregon maple. Common 

 everywhere around Portland. Although a dicotyledon, three 

 cotyledons are not uncommon in this specie.'^, but tricarpellary 

 fruit is comparatively rare. The flowers, which appear in April, 

 are greatly relished by the mountain grosbeaks as well as by the 

 myiiads of bee.s wasps and smaller insects which visit a tree of 

 this species when in full bloom. April, May. Greenish-yellow. 

 Acer GLABRUM Torr. Dwarf maple. Rare in our limits. 

 On banks of Clackamas river near the county bridge. April. 

 May. Greenish-yellow. 



ACER CIRCINATUM Pursh. Vine maple. Common in moist 

 woods, Macleay Park, City Park, h. & C. fair grounds, Mt. Ta- 

 bor, etc. Usually a small, much branched, sprawling tree, 3 to 

 7 inches in diameter by 15 to 25 feet high within our limits, but 

 a specimen collected on Necanicum river, Oregon, measured 13 5^ 

 inches in diameter at base by 30 feet high. Tricotyledonous 

 seedlings are infrequent, but in certain seasons tricarpellary 

 fruits are not uncommon, about 100 being formed on a single 

 tree in Portland. April, May. Calyx dark red, petals greeni:>h 

 white. 



