36$-~ MONOECIA.— POLYANDUIA. 



5. B. lenta : leaves cordate-ovate, sharply serrate. 



acuminate ; nerve* In-i.eath ami the petiole hairy; 

 strobile erect ; scales smooth, the lobes equal and 

 obtuse, with elevated veins. 

 HAB. Woods. A large tree; bark aromatic; 

 branchlets dark, spotted. 



6. B. pumila : young branches pubescent, not punc- 

 , tate ; leaves orbicular-obovate, petiolate, thickly 



pubescent beneath ; strobile cylindrical, 

 HAB. Mountain bogs. June. Shrub 2 — 3 ft. high: 

 leav r 1 in. long, on short pet. 



7. B. glandulosa : branches glandularly punctate, 



smooth ; leaves ohovate, serrate, entire at the 

 base, smooth, ^ubsessile ; strobile oblong; scales 

 half 3-cleft ; seed orbicular, with a narrow mar- 

 gin. 



H/\B. Mountain swamps. Slirub 2 ft. high. 

 3. B. nana : very smooth loaves ; orbicular, crenate, 

 reticulate beneath ; scale* of the strobile deeply 

 3-partfd; segments oblong; seed orbicular, nearly 

 wingless. 



HAB. High mountains. Shrub 1 — 2ft.high;hav. 

 h in. long. 



555. CARPINUS. Hornbeam. Con/urea. 



0. americana ; leaves oblong-ovate, acuminate, une- 

 qually serrate ; strobile with 3-parled scale?, the 

 middle segment oblique, toothed on one side. 

 HAB. Woods. May. A small tree ; fertile amenis 

 loose; scales foliaceovs. 



556. OSTRYA. Hop hornbeam. ConjJacew. 



(). virginica : leaves ovate oblong, cordate at the base., 

 acuminate, unequally serrate ; strobile oblong- 

 ovate, erect ; buds acute. 

 HAB., Woods. A small tree; cones large, rttem- 

 bling hops. 



557. PLATANUS. Buttonwood. 

 P. occidenfalis: leaves lobed-ai.gnlar; branches whitish. 

 HAB. Woods A very large tree : leav. very broad; 

 ainents glob*, pendulous. 



