208 . OCTANDRIA MONOGYNIA. Acer. 
In Canada and on the Allegany mountains; frequent. 
h. April, May. v. v. Flowers very small, greenish- 
yellow. i 
Negundo. ^ 10. A. foliis pinnatis ternatisve inzequaliter serratis, floribus 
dioicis. Willd. sp. pl. 4. p. 992. 
Icon. Mich. arb. 18. Schmidt arb. 12. Wangh, amer. 
t. 12. f. 29. 
On the banks of rivers: Pensylvania to Carolina. h. 
May, June. v. v. AA large tree, commonly called 
Box Elder or Ash-leaved Maple. 
343, DIRCA. Gen. pl. 665. 
palustris. 1, Dirca. Willd. sp. pl. 2. p. 42A. 
Icon, Duham. arb. 1. t.212. Ameen. acad. 3. t. 1. f. 7. 
In shady and boggy woods: New York to Carolina. 
h. March, April, v. v. A low shrub; flowers 
yellow ; known by the name of Leather-wood, on 
account of the extraordinary toughness of its branches. 
344. JEFFERSONIA. Barton in act. philad. Mich. fl. 
amer. 1. p. 236. 
diphylla. J. Jeffersonia. Bart. 1. c. 
J, Bartonis, Mich. fl. amer. 1. p. 237. 
Podophyllum diphyllum. Willd. sp. pl. 2. p. 1141. 
On the side of hills, in rich soil, particularly limestone : 
Virginia and Tennassee ; plentifully about Harper's 
Ferry and the Sweet-springs, Virginia. 2%. April, 
May. v. v. Flowers white, resembling those of 
Sanguinaria; the capsule is covered with a lid, which 
opens with elasticity and scatters the ripe seeds. 
345. PISTIA. Gen. pl. 1112. i 
spathulata, 1; P foliis in petiolum abrupte angustatis superne dilatatis 
 rotundato-obtusis. Mich. fl. amer. 2. p. 162. 
In Carolina. Michaux, +. Flowers white, axillary. 
