VOL. II.] 



3. Rhus glabra L/. 

 Sumac. 



SUMAC FAMILY. 



Smooth Upland or Scarlet 

 (Fig. 2349.) 



Rhus glabra L. Sp. PI. 265. 1753. 



A shrub or rarely a small tree, 2-2o high, similar to 

 the preceding species, but glabrous and somewhat glau- 

 cous. Leaflets 11-31, lanceolate or oblong-lanceolate, 

 2 / -4 / long, acuminate at the apex, rounded and often 

 oblique at the base, dark green above, whitish beneath, 

 sharply serrate, rachis not winged; pedicels sometimes 

 slightly pubescent; inflorescence and fruit similar to 

 those of the two preceding species; drupe covered with 

 short reddish acid hairs; stone smooth. 



In dry soil, Nova Scotia to British Columbia, south to 

 Florida, Mississippi and Arizona. Foliage sometimes used 

 for tanning. This species and the two preceding sometimes 

 have the whole or a part of the flower-clusters changed into 

 small leaves. A form with laciniate leaflets occurs in south- 

 ern Pennsylvania and Delaware. June-Aug. 



4. Rhus aromatica Ait. 



Fragrant or Sweet-scented Sumac. (Fig. 2350.) 



Toxicodendron crenatum Mill. Card. Diet 



Ed. 8, no. 5. 1768? 



Rhus aromatica Ait. Hort. Kew. 1:367. 1789. 

 Rhus Canadcnsis Marsh. Arb. Am. 129. 1785. 



Not Mill. 1768. 



A shrub, 3-8 high, ascending or diffuse. 

 Leaves petioled, 3-foliolate, 2 / -4 / long, aro- 

 matic ; leaflets ovate or rhomboid, i'-2' 

 long, 9 // -i8 // wide, the lateral ones sessile, 

 the terminal short-stalked, acute or obtusish 

 at the apex, the lateral rounded or truncate, 

 the terminal cuneate at the base, all crenate 

 or crenate-dentate with numerous large 

 teeth, and pubescent, especially when young; 

 flowers yellowish green, about \" broad, in 

 clustered spikes appearing before the leaves; 

 drupe globose, red, pubescent; stone smooth. 



In rocky woods, Ontario and Vermont to 

 Florida, especially along the mountains, west 

 to Minnesota, Arkansas and Louisiana. The 

 catkin-like spikes are developed on the 

 branches in late autumn. March-April. 



5. Rhus trilobata Nutt. Ill-scented Sumac. 

 Skunk-bush. (Fig. 2351.) 



Rhus trilobata Nutt.; T. & G. Fl. N. A. i: 219. 1838. 

 Rhus aromatica var. trilobata A. Gray; S. Wats. Bot. King's 

 Exp. 53. 1871. 



A glabrous or nearly glabrous shrub, 2-6 high. 

 Leaves petioled, 3-foliolate, unpleasantly odorous, i / -2 / 

 long; leaflets sessile, or very nearly so, y 2 '-\' long, pu- 

 berulent when young, glabrous when mature, ovate or 

 oval, obtuse, the terminal one commonly considerably 

 larger than the lateral and cuneate at the base, all cre- 

 nately few-lobed or toothed or sometimes entire; flowers 

 as in the preceding species, and fruit similar. 



Illinois to Nebraska, south to Texas, west to California. 

 March. 



