OXAGRACEAE 223 



5. ONAGRA Adans. 



Capsules 2 cm. to almost 3 cm. long, abruptly narrowed at the apex : plants 

 appressed-pubescent. i. O. biennis. 



Capsules 3 cm. long or longer, gradually narrowed at the apex : plants velvety- 

 pubescent. 2. O. Oakesiana. 



1. Onagra biennis (L.) Scop. Common Evening primrose. (Man. 

 p. 657; I. F. y. 2jjg.) Usually in dry soil, Lab. to Fla., west to the 

 Miss. Valley. Nat. in the Old World. — Pennsylvania: Monroe; 

 Northampton ; Bucks ; Philadelphia ; Delaware ; Chester ; 

 Lancaster ; Dauphin ; Franklin ; Huntingdon ; Allegheny'. 



2. Onagra Oakesiana (A. Gray) Britton. Oakes' Evening-prim- 

 rose. (Man. p. 657; I. F. /. 2jSo.)^ Shores of the St. Lawrence and 

 along the Great Lakes to Mass., Pa. and Neb. — Pennsylvania : Monroe, 

 Tannersville. 



6. OENOTHERA L. 



1. Oenothera laciniata Hill. Sinuateleaved Evening-primrose. 

 (Man. p. 658 ; I. F. /. ^jSs.) In sandy dry soil, southern N. J. to Pa., 

 111. and Neb., south to Fla., Tex. and Mex., extending in S. Am. Nat. 

 in '^ \..— Pennsylvania : Bucks ; Philadelphia. 



7. KNEIFFIA Spach. 

 Capsules club-shaped. 

 Capsules pubescent. 



Pedicel-like base longer than the capsule-body whose thick wings are 



pubescetit. i. K. longipedicellaia. 

 Pedicel-like base shorter than the capsule-body whose thin wings are 



glabrous. 2. K. lijuaris. 



Capsules glabrous or nearly so. 3. K. pjitnila. 



Capsules oblong or nearly so. 4. K.fruticosa. 



1. Kneiffia longipedicellata Small. Long stemmed Sundrops. 

 (Man. p. 659; I. F. / 2jSc).) In fields and thickets, N. Y. to W. Va. 

 and Fla. — Pennsylvania : Bucks, Tally town ; Delaware, Tinicum. 



2. KneifB a linearis (Michx. ) Spach. Narrow-leaved Sundrops. 

 (Man. p. 660; I. F. f. 2^90.) In meadows. Conn, to Ten n. and Ga. — 

 Pennsylvania : Lancaster ; Montgomery. 



3. Kneiffia putnila (L.) Spach. Small Sundrops. (Man. p. 660 ; 

 I. F./. 2jgi.) In dry soil, N. S. to Man., N. J., Ga. and ILans,.— Pennsyl- 

 vania : Pike ; Monroe ; Northampton ; Bucks ; Delaware ; Lan- 

 caster ; York ; Huntingdon ; Blair ; Allegheny. 



4. KneifiBa fruticosa (L. ) Raimann. Common Sundrops. (Man. p. 

 660 ; I. F. /. 2jg2.) In dry soil, N. S. to Ga., Minn, and La. — Pennsyl- 

 vania : Northampton ; Bucks ; Delaware ; Chester ; Lancaster ; 

 Montgomery; Franklin; Centre; Crawford; Somerset. 



4a. K. fruticosa pUosella (Raf.) Britton. (Man. p. 660. ) On banks, 

 N. Y. to 111., south to Ga. — Northampton; Bucks; Monroe; Lu- 

 zerne ; Clarion ; Allegheny. 



