280 SCROPHULARIACEAE 



7. CHELONE L. 

 1. Chelone glabra L. Snake-head. TurTlE-head. (Man. p. 823 ; 

 I. V. f. 3244.') In swamps and along streams Newf. to Fla., Man. and 

 K.s^ns.— Pennsylvania : Northampton; Monroe; Luzerne; Bucks; 

 DEI/AWARE ; Chester ; Montgomery ; Lycoming ; Lackawanna ; 

 Lancaster ; Franki,in ; Huntingdon ; Erie ; Ai,i,egheny. 



8. PENTSTEMON Solatid. 



Stem pubescent with spreading hairs. i. P. hirsutus. 



Stem glabrous below the inflorescence. 

 Corolla white, mostly over 2.5 cm. long, the tube abruptly enlarged. 



2. P. Digitalis. 

 Corolla purplish, mostly less than 2 cm. long, the tube gradually enlarged. 



3. P. Pentstemon. 



1. Pentstemon hirsutus (L.) Willd. Hairy Beard-Tongue. (Man. 

 p. 824 ; 1. F. /. 324.^.) In dry woods and thickets, Me. to Out., Man., 

 Fla., Minn, and Tex. — Pennsylvania: LuzERNE; Northampton; 

 Bucks ; Montgomery ; Phii,adei,phia ; Delaware ; Chester ; Lan- 

 caster ; Franklin ; Huntingdon ; Allegheny. 



2. Pentstemon Digitalis (Sweet) Nutt. Foxglove Beard-tongue. 

 (Man. p. 825 ; I. F. /. 3251.) In fields and thickets. Me. to 111., Kans., 

 Va. and Ark. — Pennsylvania : Monroe ; Lancaster. 



3. Pentstemon Pentstemon (L. ) Britton. Smooth Beard-tongue. 

 (Man. p. 825 ; I. F./ 325^-) In woods and thickets, N. Y. to Fla., Ky. 

 and La. — Pennsylvania : Bucks ; Franklin ; Fayette ; Westmore- 

 land ; Allegheny. 



9. PAULO"WNIA Sieb. & Zucc. 

 1. Paulownia tomentosa (Thunb.) Baill. Paulownia. (Man. p. 

 827; I. F. / 3264.) Escaped from cultivation, N. Y. and N. J. to D. 

 C. and Ga. — Pennsylvania: Philadelphia; Lancaster. 



10. MIMULUS L. 



Corolla blue or violet, or rarely white. 



Calyx shorter than the pedicel : leaf-blades sessile and partly clasping. 



I. M. ringens. 



Calyx longer than the pedicel ; leaf-blades petioled. ^. M. alatus. 



Corolla yellow. 3. M. moschatus. 



1. Mimulus ringens L. Square-stemmed Monkey-flower. (Man. 

 p. 827 ; I. F.y; 326^-) In swamps and along streams, N. S. to Va., Tenn., 

 Neb. and Tex. — Pennsylvania : Monroe ; Northampton ; Bucks ; 

 Delaware ; Chester ; Lancaster ; Dauphin ; Columbia ; Frank- 

 lin ; Huntingdon ; Allegheny. 



2. Mimulus alatus Soland. Sharp-winged Monkey- Flower. 

 (Man. p. 827 ; I. F./ 3266.) In swamps, Ont. to Conn., 111., Ga., Kans., 

 and Tex. — Pennsylvania: Northampton; Bucks; Delaware; Ches- 

 ter ; Huntingdon. 



