170 OCTANDRIA.— MONOGYNIA. 



4. A. saccharinum : leaves palmately 5-lobed, subcor- 



date at the base, acuminate, glaucous beneath ; pe- 

 duncles corymbose, nodding. 

 HAB. Woods. April. A large tree ; fl. yellowish on 

 Jilif. fed. ; wings narrow. 



5. A. nigrum: leaves palmately 5-lobed, cordate, with 



the sinus closed ; lobes divaricate, sinuate-subden- 

 tate, pubescent beneath ; flowers corymbed ; sama- 

 ras turgid, subglobose. 



HAB. Mountainous regions. April. A large tree ;Jl. 

 yellowish on Jilif. ped., apet. 

 (?. A. pennsylvanicum : leaves with 3 acuminate lobes, 

 rounded at the base, acutely dentate, smooth ; ra- 

 ceme simple, pendulous. 



HAB. Mountains. May. Shrub ten ft. high; bark 

 striped; fl. gr. yel., large. 



7. A. montanum: leaves somewhat 5-lobed, acute, den- 



tate, pubescent beneath ; racemes compound, 

 erect. 

 HAB. Mountains. May. Shrub 6— 10ft. high ; leav. 

 small ; fl. greenish. 



t Flowers diozcious. Calyx minute , b-toothed. Petals 0. 

 stamens 5 ; anthers linear, sessile, acuminate. Sa- 

 maras as in Acer. — Negundium. 



8. A. Negundo : leaves pinnate and ternate, unequally 



serrate. 

 HAB. River banks. April. A large tree : leaflets 

 5 — 7 ,- racem. pend. 



275. DIRCA. Leather-wood. Thymelece. , 



D. palustris : 



HAB. Woods. April. Shrub 2 ft. high, with tough 

 bran. ; fl. and bark yellow. 



276. JEFFERSONIA. Podophyllacece. 



J. diphylla. 



HAB. Fertile woods. V-- Leaf binate,peiiol.; scape 



\ft. high,fl. sol. term., large, white; caps, large. 



coriac. 



