ONAGRACEAE. 233 



' : 4. CHAMAENEEION Adans. 



1. Chamabnerion angustifolium (L-) Scop. Great Willow-herb, Fixe-weed. 

 M. p> 655. Dry soil. Summer. 



5. EPILOBIUM L. Willow-herb. 



Leaves linear or lanceolate, entire or nearly so. . j 



Plants crisp-pubescent or caneseent. 1. E. lineare- 



Plants glaadularKpubescent throughout or only above. 



2. E. strictwm. 



Leaves lanceolate or ovate, serrate. 



Seeds obconic, beakless ; coma reddish. 3. E. coloratnm. 



Seeds ellipsoid, short-beake*; coma white. 4. E. adenovaulon. 



1. Epilobium lineare Muhl. M. p. 656. Swamps. Summer. 



Bucks — Springfield Twp. (Pr.). Lancaster — PeaA Bottom (Ca.), 

 Little Britain Twp, (Pr.). 

 Cape May— Cape May (Ja.). 

 New Castle— Thompson's, Hand's." Bare. 



2. Epilobium strjqtum Muhl. M. p. 656. Bogs. Summer. 



Delaware— (P.). Lancaster — Near Lancaster (Ca,). ' 



Burlington— Pemberton (C). Cape May— Sea Isle City (Li.). 



3. Epilobium coloratum Muhl. M. p. 656. Wet places. Summer. 



4. Epilobium adenocaulon Haussk. M. p. 656. Wet places. Summer. 



Delaware— Tinicum (B. Sm.). Northampton — Pen Argyl (He.) (Ja.). 

 .New Castle — Jackson and Sharpe's lumber yard. 



.«. Epilobium parviflorum Scheetz. Ballast. i 



Philadelphia— Philadelphia, C. A. Boice (B. C). 



6. ONAGBA L. 

 1. Onagra biennis (L.) Scop. Common Evening Primrose. M. p. 657. 

 Dry soil. Summer and fall. 



< ■ 7. OENOTHEBA L. Evening Primrose. 



Silweiy-pubescenti with appressed or ascending hairs ; seeds striate. 



■ ■'... 1.0. humifusa. 



Glabrous or sparingly hirsute-pubescent; seeds pitted. 2. 0. laciniata. 



1. Oenothera humifusa Nutt. M. p. 658. Sea-beaches. Summer. 



Ca^e May— Wildwood, Anglesea, Cape May, Ocean City (He.). Ocean 

 i —Seaside Park (Ha.). 



2. Oenothera laciniata Hill. M. p. 658. Sandy, dry soil. Early summer. 



Philade Iphia— Chestnut Hill (Je.). Bucks— (P.). Chester— Coates 

 ville, B. E. Stone (B. C). 

 New Jersey — Common. 

 New Castle— Townsend, Canty. 



8. KNEIPP1A Spaeh. Sundrops. 



Capsules club-shaped. 



Pedicels and capsules pubescent. 



Pedicel longer than the body »f the eapsule, the wings thick and 

 pubescent. 1. K. longipedicellata. 



