STAPHYLEACEAE 205 



Leaf-blades pale or glaucous beneath : lobes coarsely toothed. 



4. A. Saccharunt. 

 b. Flowers in terminal racemes or panicles. 



Flowers in racemes : petals about as long as the sepals : samaras over 2.5 

 cm. long. 5. A. Pennsylvanicum. 



Flowers in panicles : petals twice or thrice as long as the sepals : samaras 

 less than 2.5 cm. long. 6. A. spicatunt. 



B. Leaf-blades 3-9-foliolate. 7. A. Negundo. 



1. Acer saccharinum L,. Silver or Soft Maple. (Man. p. 607 ; 

 I. F.y. 2J72.) Along streams, N. B. to Fla., southern Ont., Dak. N. and 

 the Ind. Terr. — Pennsylvania : Monroe ; Northampton ; Bucks ; 

 Chester ; Lancaster ; Allegheny. 



2. Acer nibrum L. RED or ScarLET MaplE. (Man. p. 607 ; I. F. 

 /. 2J7J.) In swamps and low grounds, N. B. to Man., Fla. and Tex. — 

 Pe7insylvania : Tioga; Lack.wvanna ; Monroe; Northampton; 

 Bucks ; Delaware ; Chester ; Franklin ; Westmoreland ; Alle- 

 gheny. 



3. Acer nigrum Michx. Black Sugar Maple. (Man. p. 608; I. 

 F. f. 2376.) Ont. and Vt. to Ga., Minn., La. and Ark. — Pennsylvania : 

 Northampton ; Huntingdon ; Allegheny. 



4. Acer Saccharum Marsh. Sugar or Rock Maple. (Man. p. 607 ; 

 I. F. f. 2jy^.) In rich woods, Newf. to Man., south to Fla. and Tex. — 

 Pennsylvania : Tioga ; Monroe ; North.\mpton ; Bucks ; Dela- 

 ware; Chester ; Lancaster ; Huntingdon; Somerset ; Erie ; Alle- 

 gheny. 



5. Acer Pennsylvanicum L. Striped Maplh. (Man. p. 608 ; I. F. 

 /". 2jyS.) In rocky woods, N. S. to Lake Superior, and along the moun- 

 tains to Ga. and Tenn. — Pennsylvania : Bucks ; Monroe ; Dauphin, 

 Cold Springs ; CENTRE ; Huntingdon ; Blair ; Fayette ; Somer- 

 set. 



6. Acer spicatum Lam. Mountain MaplE. (Man. p. 608 ; I. F. 

 _/". 2jy(p.) Damp rocky woods, Newf. and James' Bay to Man., south, 

 especially along the mountains to N. C, Tenn. and Minn. — Pennsylvania : 

 Monroe ; Northampton ; Bucks ; Schu^ylkill ; York ; Franklin ; 

 Huntingdon ; Berks ; Somerset ; Erie ; Allegheny. 



7. Acer Negundo L. Box ELDER. Ash-lEaved Maple. (Man. p. 

 60S ; I. F. /. 2jSo.) Along streams, Vt. and Ont. to Man., Fla. and N. 

 Mex. — Pennsylvania : Northampton ; Bucks ; Chester ; Berks ; 

 Lancaster ; Dauphin; Westmoreland, Allegheny. 



Family 7. STAPHYLEACEAE DC Bladder-nut Family. 

 1. STAPHYLEA L. 

 1. Staphylea trifolia L. American Bladder-nuT. (Man. p. 606 ; I. 

 F- y- ^S7-^-) 111 moist woods and thickets, Quebec and Ont. to Minn., 

 S. C. and Kans. — Penfisylvania : Northampton ; Bucks ; Delaware ; 

 Chester ; Montgomery ; Lancaster ; Franklin ; Huntingdon ; 

 Somerset; Allegheny. 



