The Flora of the Cayuga Lake Basin 431 



3c. L. canadensis L., var. obovata Wiegand. 



In situations similar to the preceding ; infrequent or rare. 



Norton Landing (D. in C. U. Herb.) ; and probably elsewhere. 



Me. to Ind. and Nebr., southw. to N. J. and Okla. 



[The form without leaf auricles is forma stcnopoda Wiegand, not reported from 

 the Cayuga Lake Basin.] 



4. L. spicata (Lam.) Hitchc. (L. leucophaea of Cayuga Fl.) Blue Lettuce. 



Damp thickets, in rich soil ; common, and generally distributed. Aug.-Sept. 



Newf. to Man., southw. to N. C, Tenn., Iowa, and Colo. ; occasional' on the 

 Coastal Plain, but much more abundant inland in the richer soils. 



A hybrid of L. spicata and L. canadensis (L. Morssii Robins.), with white pappus 

 and slightly beaked, 3-nerved achenes, has been found along the road north of En- 

 field Glen. 



47. Crepis L. 

 1. C. capillaris (L.) Wallr. Hawk's Beard. 



Lawns and other grassy places, in rather light soil; occasional. June-Sept. 



C. U. campus (S. H. Burnham) ; one-half mile e. of C. U. farm barns; Lake View 

 Cemetery, Ithaca; Highland Ave., Cayuga Heights, 1913 (E. L. Palmer) ; Cayuga 

 Heights Road; alluvial field along Clyde River, Galen. Of recent introduction, hav- 

 ing been first reported in 1913. 



Conn, to N. Y., southw. to N. J. and Pa. ; perhaps more widely distributed. Ad- 

 ventive from Eu. 



48. Prenanthes (Vaill.) L. 



a. Principal involucral bracts 8. 



b. Pappus cinnamon color. 1. P. alba 



b. Pappus tawny or whitish. 2. P. trifoliolata 



a. Principal involucral bracts 5. 3. P. altissima 



1. P. alba L. Rattlesnake Root. White Lettuce. Lion's-foot. 



Open woods and thickets if not too dry, in rather heavy, slightly calcareous or 

 neutral, soils; frequent. Aug. 1-Sept. 15. 



Lower Six Mile Creek; Cascadilla woods (D.\) ; Fall Creek woods; around Mud 

 Creek, Freeville ; Paine Creek ; and elsewhere ; less abundant in the more acid sandy 

 soils of the basin. 



S. Me. to Sask., southw. to Ga., Ky., and 111.; rare or absent on the Coastal Plain. 



A form with cauline leaves deeply 3-S-parted, and the lobes pinnatifid, occurs in 

 Cascadilla woods. 



2. P. trifoliolata (Cass.) Fernald. (P. Serpentavia of Cayuga Fl.) Rattlesnake 



Root. Gall-of-the-earth. Lion's-foot. 



In situations similar to the preceding, in gravelly or sandy, more or less acid, 

 soils; more common. Aug. 1-Sept. 15. 



Widely distributed in dry woodlands on the high sterile hills of the basin and in 

 the ravines ; absent in the richer woods. 



Newf. and Que. to N. Y. and Mo., southw. to N. C. and in the mts. to Tenn., 

 including the Coastal Plain. 



The leaf outline varies greatly. The principal types are as follows: (a) leaves 

 not parted; (b) leaves parted, the divisions not stalked; (c) leaves divided, the 

 divisions of the lower and of the middle leaves stalked. 



