ONAGRACEAE 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, i. O. Oakesiana. 



1. Onagra biennis (I/.) Scop. Common Evening primrose. (Man. 

 p. 657; I. F. /. 2379.) 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; L F. _/! ^jSo.) 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. Sinuate-lEaved Evening-primrose. 

 (Man. p. 658 ; I. F. /. 2J82.) In sandy dry soil, southern N. J. to Pa., 

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

 in Vt.— Pennsylvania : Bucks j Philadelphia. 



7. KNEIFFIA Spach. 

 Capsules club-shaped. 

 Capsules pubescent. 



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



pubescent. i. ^. longipedicellala. 

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



glabrous. 2. K. linearis. 



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



Capsules oblong or nearly so. 4- K.frnticosa. 



1. EneifHa longipedicellata Small. LONG stemmed Sundrops. 

 (Man. p. 659; I. F. / 25^9.) In fields and thickets, N. Y. to W. Va. 

 and Via.— Pennsylvania : Bucks, Tullytown ; Delaware, Tinicum. 



2. Kneiffia linearis '( Michx. ) Spach. Narrow-lEaved Sundrops. 

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

 Pennsylvania : Lancaster ; Montgomery. 



3. KneifBa pumila (L.) Spach. Small Sundrops. (Man. p. 660 ; 

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

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

 caster ; York ; Huntingdon ; Blair ; Allegheny. 



4. Kneiffia frutioosa (L.) Raimann. Common Sundrops. (Man. p. 

 660 ; I. F. /. 2S92.) In dry soil, N. S. to Ga., Minn, and 'ha.— Pennsyl- 

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

 Montgomery; Franklin; Centre; Crawford; Somerset. 



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

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

 zerne ; Clarion ; Allegheny. 



