850 Wisconsin Academy of Sciences, Arts, and Letters . 
Gelastrace/e. Staff tree Family. 
543. Euonymus atropurpureus, Jacq. Burning-bush. 
Rare; low thickets. 
544. Celastrus scandens, L. Climbing Bittersweet. 
Occasional; thickets and fence-rows. The showy 
orange and red fruit very ornamental in autumn. 
Sapindaceai:. Maple Family. 
545. Staphylea trifolia, L. Bladder-nut. 
Occasional; low thickets. 
546. Acer saccharinum, L. (A. dasycarpum, Ehrh.) Silver 
Maple. 
Common; well-known in cultivation and well-estab¬ 
lished as an escape. There are some splendid specimens 
of the Silver Maple along Upper Root River, though 
these perhaps are not native. 
The earliest dowering of our trees. 
547. Acer rubrum, L. Red Maple. 
Frequent; wet woods and low delds. The scarlet 
foliage very conspicuous in autumn. 
548. Acer saccharum, Marsh. (A. saccharinum, Wang.) Hard 
Maple; Sugar Maple. 
Common; woods, throughout the eastern part of the 
area. 
A large well-known tree, whose sap ought to be the 
main source of maple sugar! 
549. Acer saccharum, Marsh., var. nigrum, Britton. 
Frequent; same habitat as the preceding and inter¬ 
grading with it. 
550. Regundo aceroides, Moench. Box Elder. 
Occasional; often planted and well established as an 
escape at a number of stations. 
Balsaminace.e. Jewel-Weed Family. 
551. Impatiens fulva, ETitt. Spotted Touch-me-not; Balsam; 
Jewel-weed. 
Common; moist places, usually in shade. 
