222 ONAGRACEAE 



2. LUD"WIGIA L. 



Corolla wanting: or obsolete : flowers sessile : capsule valvate. 



1. L. sphaerocarpa. 

 Corolla conspicuous : flowers peduncled : capsule opening by a terminal pore. 



2. L. alternifolia. 



1. Ludwigia sphaerocarpa Ell. Globe-fruited Ludwigia. (Man. 

 p. 653 ; I. F. f. 2S57-) I"^ swamps, eastern Mass. and southern N. Y. to 

 Fla., west to La. — Pennsylvania : Bucks, Bristol. 



2. Ludwigia laternifolia Iv. SEEd-box. RaTTI<E-box. (Man. p. 

 654 ; I. F. f. 25b3.) In swamps, N. H. to northern N. Y., Ont. (?), Mich., 

 Fla., Kans. and Tex. — Pennsylvania: Northampton; Bucks; Dei<a- 

 WARE ; Chester ; Lancaster ; Columbia ; Huntingdon ; Ax,i,E- 



GHENY. 



3. CHAMAENERION Adans. 

 1. Chamaenerion angustifohum (L. ) Scop. Great or Spiked WiL- 

 LOW-HERB. FiRB-WEED. (Man. p. 655; I. F. /. Z5(5(5.) \n, dry soil, 

 Lab. to Alaska, N. C, Kans., Ariz, and Calif. Also in Eu. and Asia.— 

 Pennsylvania : Lackawanna ; Monroe ; Schuyi<kili, ; Luzerne ; 

 Cambria ; Northampton ; Bucks ; Phii,adei,phia ; Chester ; Lan- 

 caster ; Centre ; Ai,i,egheny. 



4. EPILOBIUM L. 



Leaf-blades linear to lanceolate, essentially entire. 

 Leaf -blades petroled : plants canescent. 1 . E. Hneare, 



Leaf-blades sessile : plants glandular-pubescent. 2. E. slriclum. 



Leaf-blades ovate to lanceolate, serrate; 

 Flowers drooping ; seeds obconic, beakless : coma reddish. 



3. E, coloraium. 

 Flowers erect ; seeds ellipsoid, short-beaked : coma white. 



4. E. adenocaulon. 



1. EpUobiumlineare Muhl. Linear-lEavEd Wii<i,ow-hERB. (Man. 

 p. 655 ; I. F. /. 3S72.) In swamps, N. B. to B. C, Del., the Ind. Terr, 

 and Wyo. — Pennsylvania : Lackawanna ; Monroe ; Schuyi,kii,l : 

 Lancaster; Bucks. 



2. Epilobiom strictum Muhl. Downy or Soft Wii,low-herb. 

 (Man. p. 656 ; I. F. /. 2373.) Bogs, Me. to Ont., Minn., Va. and 111.— 

 Pennsylvania : Lancaster ; Dei,awarb ; Ei<k ; Crawford ; Erie. 



3. EpUobium coloratum Muhl. Purpi,E-i,Eaved Wii.low-herb. 

 (Man. p. 656 ; I. F./. 25-75. ) I" 'ow grounds. Me. to Ont., Wis., S. Dak., 

 S. C. and Kans. — Pennsylvania : Monroe ; Lackawanna ; North- 

 ampton ; Bucks ; Phii,adei<phia ; Dei<aware ; Chester ; Lancaster ; 

 Dauphin ; Franklin ; Huntingdon ; Erie ; Allegheny. 



4. Epilobium adenoca\ilon Haussk. Northern Willow-herb. 

 (Man. p. 656; I. P./. 2^76.) In moist grounds, N. B. to Ore., south to 

 Mass., Pa., Iowa, Utah and Calif. — Pennsylvania: Monroe; Schuyl- 

 kill; Luzerne; Tioga; Delaware, Tinivum. 



