72 LE&UMINOSJS. 



3. R. aromatica, Ait : branches slender, nearly smooth ; leaves ternate , 

 leafets sessile, ovate-rhomboid, deeply toothed, tomentose beneath ; flowers 

 in dense axillary racemes or catkins, dioecious ; fruit pilose. Lobadium, 

 aromaticum Raf. 



Rocky places. Arct. Amer. to Geor. W. to Miss. April, May. \i\ Stem 

 2- -6 feet high. Flowers yellow. Fruit red, more or less hispid, acid. 



Aromatic Sumach. 

 ** Leaves pinnate, smooth. 



4. R. glabra Linn. : stem and branches smooth ; leafets in many pairs ; 

 sessile, lanceolate, acuminate, sharply serrate, smooth, whitish glaucous be- 

 neath ; flowers all perfect, in terminal compound panicles. 



Old fields. Can. to Geor. W. to Miss. July. 1}. Stem 612 feet high. 

 Flowers greenish-yellow. Fruit crimson, covered with short hairs, acid. 



Smooth SumacJi. 



5. R. Copallina Linn. : branches terete, downy ; leafets 4 7 pairs, with 

 an odd one, oval-lanceolate, or oblong, very entire, shining on the upper 

 surface ; pubescent beneath, unequal at base ; petiole winged, appearing as 

 if jointed ; flowers in sessile panicles, dioecious. 



Dry fields. Can. to Flor. W. to Ark. July, Aug. A small shrub, with yel- 

 lowish-green flowers. Fruit red, small, compressed, hairy, acid, and bitter. 



Mountain Sumach. 



6. R. venenata D. C. : branches, leaves, and petioles very smooth ; 

 leafets in 3 6 pairs, oblong-oval, abruptly acuminate, nearly entire ; peti- 

 oles without joints or wings ; flowers in loose slender panicles, dioecious ; 

 fruit smooth, greenish- white. R. Vernix Linn. 



Margins of swamps. Can. to Geor. W. to Louis. June, July. \i. Stem 

 6 12 feet high. Flowers greenish. Fruit about as large as a pea. Poisonous. 

 Big. Med. Sot. i. 96. Poison Sumach. Poison Elder. 



*** Leaves pinnate, pubescent. 



7. R. typhina Linn. : branches and petioles very villous ; leafets in many 

 pairs, lanceolate-oblong, acuminate, acutely serrate, whitish and more or 

 less pubescent beneath ; flowers in oblong dense panicles, dioecious. 



Rocky hills. Can. to Car. June. I}. Stem 1015 feet high. Flowers 

 greenish-yellow. Fruit in clusters, covered with a purple velvety down, acrid. 



Stag-horn Sumach. 



ORDER XXXVII. LEGUMINOS^E. LEGUMINOUS PLANTS. 



Calyx of 5 sepals, more or less combined. Petals 5, either 

 papilionaceous or regularly spreading. Stamens definite or in- 

 definite, distinct or monadelphous, or diadelphous. Ovary sim- 

 ple, superior. Fruit a legume. Seeds attached to the upper 

 suture, without albumen. Herbaceous plants, shrubs or trees. 

 Leaves alternate, mostly compound, and with 2 stipules at base. 



SUBORDER I. PAPILIONACE^E. 



Petals papilionaceous, imbricated in aestivation, the upper 

 exterior. 



