536 REPO'RT OF NEW JERSEY STATE MUSEUM. 



east of Cedar Grove, within sight of the houses ; and on May 8, 

 1911,1 found an isolated colony in the pine woods at Eagleswood, 

 on West Creek, three miiles from the town of West Creek. 



From the variation, in abundance of the species at different 

 times, and its apparent disappearance fromi some stations, it 

 seemis to me that it probably dies out or is exterminated by fire 

 in certain spots, while the seed blown freely over this wind- 

 swept waste is constantly starting new colonies, so^ that its actual 

 stations are continually shifting. 



PI. — ^Ljate March to mid-April, stamens drying and persisting 

 through the spring. Fr. — Late June to early July, apparently. 

 Pine Barrens. — Pemberton Mills 12 miles from Burlington, Monmouth 

 Co., Cedar Bridge, 3 miles west of Cedar Bridge, 4 miles east of Woodmansie, 

 6 miles each of Woodmansie, 3 miles west of Barnegat, Between Allen's 

 Bridge (High Bridge) and Martha, East Plains near Munyon Field, Three 

 miles northwest of West Creek. 



Fantily ANACARDIACE^. Sumacs. 

 Key to the Species. 



a. Leaves 9-31 foliate, fruit clothed with crimson hairs. 



b. Rachis of the leaf wing margined. Rhus copallina, p. 536 



hh. Rachis of the leaf nearly terete. 



c. Foliage and twigs velvety pubescent. R. hirta, p. 537 



cc. Foliage and twigs glabrous and glaucous. R. glabra, p. 537 



aa. Leaves not more than 13 foliate, fruit whitish or dun-colored. 



b. Leaflets 7-13 glabrous. R. vernix, p. 537 



bb. Leaflets always 3. 



c. Vine climbing by aerial rootlets or trailing, leaves glabrate entire or 

 sparingly sinuate or toothed. R. radicans, p. S38 



cc. Low, erect shrub, mostly v/ithout aerial rootlets, leaves very pubes- 

 cent and deeply lobed. R. toxicodendron, p. 538 



RHUS L. 



Rhus copallinum L.* Dwarf Sumac. 



Rhus Copallinum Linnseus, Sp. PI. 266. 1753 [N. America]. — Pursh, Fl. Amer. 

 Sept. I. 205. 1814. — Knieskern 11. — Britton 79. 



Frequent in sandy soil throughout the Northern, Middle and 

 Coast districts. Occasional in the Pine Barrens, where it is in- 

 troduced. 



Fl. — lyate July to early September. Fr. — ^About late August 

 into October. 



* Linnaeus seems to use this name in the genitive plural ; if so we have no 

 right to alt.er it to copallina. 



