Vo. II.] SUMAC FAMILY. 
3- Rhus glabra L. Smooth Upland or Scarlet 
Sumac. (Fig. 2349.) 
Rhus glabra ¥,. Sp. Pl. 265. 1753. 
A shrub or rarely a small tree, 2°-20° 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 
fortanning. 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.) 
Toxtcodendron crenatum Mill. Gard. Dict 
Ed.8,no.5. 1768? 
Rhus aromatica Ait. Hort. Kew. 1: 367. 1789 
Rhus Canadensis 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, 1/-2 
long, 9’’-18’’ 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 1’ 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, 1/—2/ 
long; leaflets sessile, or very nearly so, 14/-1’ 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. 
