102 JUGLANDACEAE 



19. Salix purpurea L- Purpi<E Willow. (Man. p. 320; I. P./. 

 1180. ) Sparingly escaped in the Atlantic States. Native of Eu. — Penn- 

 sylvania : Northampton ; Lancaster. 



Orders. MYKICALES. 



Family i. MYRICACEAE Dumort. Bayberry Family. 



Leaf-blades entire or toothed ; stipules wanting : scales surrounding the ovary 



2-4, very short, inconspicuous. i. Myrica. 



Leaf -blades pinnatifid ; stipules present : scales surrounding the ovary 8, sub- 

 ulate, conspicuous. ■'■ Comptonia. 

 1. MYRICA L. 

 Leaves appearing after the flowers : fruits winged by the partially adnate bract- 

 lets, in close heads. i. M. Gale. 

 Leaves appearing before the flowers : fruits not winged, separate ; bractlets 

 deciduous. ■'■ M. Carolinensis. 



1. Myrica Gale L. SwEET Gale. (Man. p. 321 ; I. F./. ii^g.) In 

 wet places, Newf. to Alaska, Va., Mich, and Wash..— Pennsylvania : 

 Monroe ; Susquehanna ; Schuylkill. 



2. Myrica Carolinensis SJill. WaxberRY. BaybERRY. (Man. p. 321; 

 I. F.y. 1161.) In dry or moist sandy soil, N. S. to Fla. and Ala. and on 

 the shores of L. Erie. In bogs in northern N. J. and Pa. Pennsyl- 

 vania : Monroe; Schuylkill; Erie, Presquelsle; Lebanon; Lan- 

 caster. 



2. COMPTONIA Banks. 



1. Comptonia peregrina (L. ) Coulter. SwEET-FERN. (Man. p. 321 ; 

 I. F. /. 1162.) In dry soil, N. S. to Man., south to N. C. and lud.— 

 Pennsylvania : Lackawanna ; Monroe ; Northampton ; Chester ; 

 Delaware ; Lancaster ; Franklin ; Huntingdon ; Erie. 



Order 4. JUGLANDALES. 

 Family i. JUGLANDACEAE Lindl. Walnut Family. 

 Staminate aments stout.'simple : fruit with an indehiscent epicarp and a sculp- 

 tured endocarp. i. Juglans. 

 Staminate aments slender, branched: fruit with a dehiscent epicarp and a 

 smooth endocarp. 2, Hicoria. 

 1. JUGLANS L. 



Fruit globular, glabrous ; nuts not angled : heart-wood dark brown. 



1. /. nigra. 

 Fruit elongated, viscid-pubescent : nuts angled : heart-wood light brown. 



2. J. cinerea. 



1. Juglans nigra L. Black Walnut. (Man. p. 323 ; I. F. /. 1149.) 

 In rich woods, Mass. to Minn., south to Fla. and Tex. — Pennsylvania: 

 Northampton ; Franklin ; Huntingdon ; Chester ; Monroe ; Lan- 

 caster ; Delaware ; Allegheny. 



2. Juglans cinerea L. BUTTERNUT. (Man. p. 323; I. F. /. //JO.) 

 InMch or rocky woods, N. B. to N. Dak., south to Del. , in the Alleghehies 



