IOWA ACADEMY OF SCIENCE 
71 
CELASTRUS L. 
596. Celastrus scandens L. Climbing Bitter Sweet. Common in thickets 
and along fences. 
STAPHYLACEAE. 
STAPHYLEA L. 
597. Staphylea trifolia L. Bladder Nut. Common in woods. 
ACERACEAE. 
ACER (Tourn) L. 
598. Acer saccharinum L. White or Silver Maple. Common. 
599. Acer saccharum Var. nigrum (Michx. f.) Britt. Rock or Sugar 
Maple. Not common in woods. 
600. Acer rub rum L. Red or Swamp Maple. Scarce in low ground. 
601. Acer negundo L. Box Elder. Common everywhere. 
B ALS AMINACE AE . 
IMPATIENS (Rivinius) L. 
602. Impatiens pallida Nutt. Pale Touch-me-not. Rather scarce in 
moist wooded places. 
603. Impatiens biflora Walt. Spotted Touch-me-not. Abundant in 
springs and bogs. 
RHAMNACEAE. 
RHAMNUS (Tourn) L. 
604. Rhamnus lanceolata Pursh. Buckthorn. Local; Turkey Creek. 
CEANOTHUS L. 
605. Ceanothus americanus L. New Jersey Tea. Common on dry hills. 
