482 



ANACARDIACEAE. 



Vol. II. 



3. Rhus glabra L. 



Smooth Upland or Scarlet Sumac. White or Sleek Sumac. 

 Fig. 2778. 



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



A shrub or rarely a small tree, 2°-20° high, similar to the 

 preceding species, but glabrous and somewhat glaucous. 

 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 preced- 

 ing species ; drupe covered with short reddish acid hairs. 



In dry soil. Nova Scotia to Minnesota, south to Florida, Mis- 

 sissippi and Louisiana. Several specific names have been pro- 

 posed for trivially different races of this species. Foliage some- 

 times 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 race with laciniate leaflets (R. 

 bipinnata Greene) occurs in southern Pennsylvania and Dela- 

 ware. Pennsylvania sumac. Shoe-make. Senhalanac. Vinegar- 

 tree. June-Aug. 



Rhus glabra borealis Britton, with the inflorescence and 

 sometimes also the foliage soft-pubescent, occurring in Mich- 

 igan and Minnesota, may be a hybrid with Rhus hirta. 



2. SCHMALTZIA Desv. Journ. Bot. 1813: 229. 1813. 



Shrubs with polygamo-dioecious small green flowers unfolding before the usually 3-folio- 

 late alternate leaves. Flowers spicate or capitate; calyx S-cleft; petals 5; stamens S; ovary 

 i-ovuled; styles 3, short. Fruit a small pubescent drupe, the stone smooth, the seed inverted. 

 [Named for C. S. Rafinesque-Schmaltz, a copious writer upon natural objects.] 



About 8 species, natives of North America and Mexico. Type species : Rhus aromatica Ait. 



Leaflets i'-3' long, crenate-dentate. acutish. i. 5'. crenata. 



Leaflets ^'-i^' long, obtuse or obtusish, with few rounded teeth or lobes. 2. S. trilobata. 



I. Schmaltzia crenata (Mill.) Greene. 



Fragrant or Sweet-scented Sumac. 



Fig. 2779. 



Toxicodendron crenatum Mill. Gard. Diet. Ed. 8, 



no. 5. 1768. 

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

 Rhus canadensis yiaLTsh.Arh. Am. I2g. 1785. Not 



Mill. 1768. 

 .S. aromatica Desv.; Steud. Nom. Ed. 2, 2: 531. 



1841. 

 Schmaltzia crenata Greene, Leaflets i : 128. 1905. 



A shrub, 3°-S° high, ascending or diffuse. 

 Leaves petioled, 3-foliolate, 2'-^' long, aro- 

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

 9"-i8" wide, the lateral ones sessile, the term- 

 inal 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 usually pubescent, especially when young, 

 often permanently so ; flowers yellowish green, 

 about i" broad, in clustered spikes; drupe glo- 

 bose, red, pubescent. 



In rocky woods, Ontario and Vermont to Flor- 

 ida, especially along the mountains, west to Min- 

 nesota, Kansas and Louisiana. Consists of numerous races, differing mainly in pubescence. 

 catkin-like spikes are developed on the branches in late autumn. March-April. 



The 



