STATE GEOLOGIST. 6i, 



PvUTACE^. Rue Family. 



XAXTHOXYLUM, C^lden. Phickly Ash. 



X. Ainericanuni, ^lill. Northern Pricklj- Ash. Toothache- tree. 



^'ery abundant southward,- extending north to Tine, Aitkin. Cass and Polk counties. 



PTELEA, L. SiiRucDY Trefoil. Hop- tree. 



P. trifoliata, L. Shrubby Trefoil. Hop-tree. Wafer Ash. 

 Lct'iKun. Southeast. 



ANACARDIACE.F:. Cashew Family. 



KHUS, L. SuMACEi. 



U* typhiua. L. Staghorn Suinach. 



Limited to the east side of the state and tlie region from the upper Mississippi river 

 northeastward, as follows : in Houston and Fillmore counties, rare ; iu Winona county 

 the most frequent species on the bluffs of the Mississippi ("at Winona samples were 

 seeu eisht inches In diameter", WinvheU), but rare farther west ; common in Ramsey 

 and Hennepin counties, extending west into the Big AVoods. and to Martin county, 

 Cratty: rare in Benton county ; common in Pine county and westward to Mille Lacs, 

 Little Kails and lake Al?x luder, Morrison county ; at Fish-hook lake in southwestern 

 Cass county, Gayri.son; and occasional n u-theastward, being reported by Clnrh at Sandy 

 lake. Fonddu Lac, Grand Portage and Pigeon river. 



K. glabra. L. Smooth Sumach. 



Common throughout the state, ex;eptin^ north of Like S.ipjrior, where it is rare. 



K. copalliiia, L. Dwarf Sumach. 



Houston count", near La Crescent, also In Winona county, Wincluil ; lake Pei>in, 

 MUs 3Iiiimiii(j-, Goodhue county, Sandhrrg-^ Saint Paul, Miss Cathcart; Blue Earth 

 county, Lfi'jBri/; Worthington, Foofe; Pipestone county, Mrs. Bcn/icf^ Rare. South. 



R. veiieuata. DC. Poison Sumach. Poison Dogwood. 



Observed, like the preceding, in H^»ustou county, near La Crescent, and m Winona 

 county, by Prof. Wiit'-liell-^ Udu.iepin county, Siinm'in-i; Anoka county, Jani ; upper 

 Mississippi river, GarrUson. Rare. 



K. Tovicodeudron, L. Poison Ivy. Poison Oak, 



Common, often abundant, throughout tlie state. (Erect or decumbent, l to 3 feet 

 higli ; not climbing,] 



R. Toxicodendron, L., var. radicans, Torr.* Chmbing Poison Ivy. 



This variety (or species) occurs sparingly in the southeast part of the state. 

 Mrs. Carter, M)>s Maniiinii- 



R. aroniatiea, Ait. Fragrant Sumach. 



Maligne river (near the international boundary east of Rainy lake), 3facoini. Rare. 



*Khus ToxieoDEXDRON, L, var, u.\DiCANS, Torr. (R. radicans, L.) Stems climb- 

 ing by means of Innumerable radicating tendrils; leaflets 3, ovate, dark green, smooth 

 and shining, entire, the lowest rarely angular ; flowers irreenish, racemed in axillary 

 panicles ; beri'ies dull white. A vigorous woody climber, ascending trees and other 

 objects 10 to 40 or 50 feet. The stem becomes 1 to 2 inches for more] in thickness, 

 covered with a greenish, scaly bark, and throws out all along its length myriads of 

 turead-like rootlets, which bind it lii-mly to its support. Wood's Clois-Booh. 



