232 
IOWA ACADEMY OF SCIENCES. 
Euphorbia L. 
359. E. glyptosperma Engelm. Spurge. Very common 
on dry prairies. 
CALLITRICHACEiE. 
Callitriche L. 
360. C. palustris L. (C. verna L.) Slough two miles 
northeast of Armstrong; also 12 mile Lake, 
(Prof. B. Shimek 1S99.) 
ANACARDIACE^E. 
Rhus. L. 
361. R. hirta (L.) Sudw. (R. typhina 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. glabra L. Smooth Sumac. Very common 
around timber. 
363. R. radicans L. Poison Oak; Poison Ivy. Very 
common in woods, and frequent on gopher 
knolls on prairies. The climbing form does not 
occur here. 
CELASTRACEA5. 
Euonymus L. 
364. E. atropurpureus Jacq. Wahoo; Burning Bush. 
Rare, in woods along the west fork of the Des 
Moines. 
Celastrus L. 
365. C. scandens L. Climbing Bittersweet. Common 
in woods and introduced by birds into artificial 
groves. 
STAPHYLEACEA3 . 
Staphylea L. 
366. S. trifolia L. Bladder-nut. A pretty shrub; rare 
in woods west of Estherville. 
