142. 
ANACARDIACEAE 
Rhus 
1. Plant a woody vine, or with woody stems ascending 
1 meter or higher; leaflets 3; flowers in axillary 
panicles’; drupes WHATS. srw eele ss eielotereiete silicic eidielcieletlldR. phadieans 
1. Plant an erect woody shrub; leaflets 11 or more; 
flowers in terminal pyramidal panicles; drupes reddish. 
2. Rachis of leaves winged; leaflets entire or 
1 cATaAlA AS Oletane) enollovlelsheieisi'e) sieueleVelolevshetsier sisle iexeicoialevereleielers eras eon CODalaelial 
2. Rachis of leaves not winged; leaflets coarsely 
serrate. 
3. Branches, petioles, and drupes with long, 
dense pubeSCeNCe....ccsccerecccccccccecseeccsers Re typhina 
3. Branches and petioles glabrous, drupes minutely 
PUDESCENE. ..ceersccceeccereseserssvcscccccecsece Re Glabra 
Rhus radicans L. Poison Ivy 
Java Farm and Ivy Neck. Ubiquitous, but conspicuously infrequent 
under Quercus prinus canopy along estuary shores. Absent from salt 
marshes, but invading sparsely wooded sandbar at Sand Point, Cheston 
Peninsula. 
R. radicans, forma malanotrichocarpa 
(A. H. Moore) Fern. 
Java Farm. Old field near Fox Creek drainage. Dense, ascending 
woody stems 3 to 5 feet tall. Near southern limit of known range. 
Higman 375. 
R. radicans, var. vulgaris (Michx.) 
DC., forma negundo (Greene) Fern. 
Java Farm. Twining on tree north of Fox Creek marsh. Near northern 
limit of known range. Higman 768. 
R. copallina L. : Dwarf Sumac 
Java Farm. One station in valley of Muddy Creek, upstream from 
culvert of old entrance road. Canopy of Fagus grandifolia, Quercus 
alba, Liriodendron tulipifera, etc. Hectare 2457. 
Ivy Neck. Infrequent, in ditch through cornfields on Scaffold 
Peninsula, also on west shore of Scaffold Peninsula under canopy of 
Liquidambar styraciflua, Acer rubrum, etc. Higman 179, 851. 
