ONAGEACEAE. 233 



4. CHAMABNERION Adans. 

 1. Chamaeneeion angustifolium (L.) Scop. Great Willotv-herb, Fire-weed. 

 M. p. 655. Dry soil. Summer. 



o. EPILOBIUM L. Willow-herb. 



Leaves linear or lanceolate, entire or nearly so. j 



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



Plants glandular-pubescent throughout or only above. 



2. E. strictum. 

 Leaves lanceolate or ovate, serrate. 



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



Seeds ellipsoid, short-beaked; coma white. 4. E. adenocaulon. 



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



^McA-s — Springfield Twp. (Fr.). Lancaster — Vea,t\\ Bottom (Ca.), 

 Little Britain Twp. (Pr.). 

 Cape May — Cape May (Ja.). 

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



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



Delaware— (P.). La;(casier— Near Lancaster (Ca.). 

 Burlington — Pemherton (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. 

 I^PiLOBiUM parviflokum Scheetz. Ballast. 



Philadelphia— Phi\adel]phia, C. A. Boice (B. C). 



6. ONAGRA L. 



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

 Dry soil. Summer and fall. 



7. OENOTHERA L. Evening Primrose. 



Silvery-pubescent with appressed or ascending hairs; seeds striate. 



1. 0. humifusa. 

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



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



Cape Mai/— Wildwood, Anglesea, Cape May, Ocean City (He.). Ocean 

 — Seaside Park (Ha.). 



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



Phikidelphia— Chestnut Hill (Je.). Bucl's—(P.). Chester— Coates- 

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

 New Jersey — Common. 

 New Oasf^e— Townsend, Canby. 



8. KNEIPPIA Spach. Sundrgps. 



C!apsules club-shaped. 



Pedicels and capsules pubescent. 



Pedicel longer than the body of the capsule, the wings thick and 

 pubescent. 1. R. longipedicellata. 



