232 iowa academy of sciences. 



Euphorbia L. 



359. E. (/Itjpto.^perma Engelm. Spurge, Very common 



on dry prairies. 



callitrichace.e. 



Callitriche L, 



360. C. palitstris L. (C. rerun L.) Slough two miles 



northeast of Armstrong; also 12 mile Lake, 

 (Prof. B. Shimek 1S99.) 



anacardiace.^. 

 Rhus, L, 



361. R. hirta {\j.) Sudw. {R. typhi na L.) Stag-horn 



Sumac. A beautiful shrub, rare in this region. 

 Bank of west fork of Des Moines two miles 

 southwest of Armstrong, and on south shore of 

 Iowa lake. 

 362.' R. r/lahra L. Smooth Sumac. Very common 

 around timber. 



363. Ji. radicans L. Poison Oak; Poison Ivy. Very 



common in woods, and frequent on gopher 

 knolls on prairies. The climbing form does not 

 occur here. 



CELASTRACE.^. 

 EUONYMUS L. 



364, E. atropurjinrcuH Jacq. Wahoo; Burning Bush. 



Rare, in woods along the west fork of the Des 

 Moines, 

 Celastrus L, 



365, C. scandenH L, Climbing Bittersweet. Common 



in woods and introduced by birds into artificial 

 groves, 



STAPH VLEACEvE. 



Staphylea L. 



366. aS'. trifolia L. Bladder-nut. A pretty shrub; rare 



in woods west of Kstherville. 



