POXICODENDRON, poison ivy, poison oak 
[S: RHUS] (Gillis, 1971) 
Toxicodendron radicans (L.) “tans poison ivy [S: Rhus radicans 
L.] (Gillis, 1971), p. 1 
Ssp. negundo (E. Greene) ili on Rhus radicans var. vulgaris 
(Michaux) DC. f. negundo (E. Greene) Fern.] (Gillis, 
1971 
*ssp. pubens (Engelm. ex S. Watson) Gillis (Gillis, 1971) 
Ssp. radicans x ssp. pubens (Engelm. ex S. Watson) Gillis [S: 
Rhus radicans L. var. radicans f. hypomalaca Fern.], 
see excluded taxa 
T. toxicarium (Salisb.) Gillis, eastern poison oak [S: Rhus 
toxicodendron L.] (Gillis, 1971), p. 1006 
ANNONACEAE, custard apple family 
ASIMINA 
Asimina triloba (L.) Dunal, pawpaw, p. 671 
APIACEAE (UMBELLIFERAE), carrot family 
AEGOPODIUM 
¢Aegopodium podagraria L., goutweed, p. 1136 
AMMI 
¢Ammi majus L., bishop’s weed, p. 1135 
ANETHUM 
+Anethum graveolens L,, dill, p. 1141 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
