398 Karl M. Wiegand and Arthur J. Eames 



4. E. sessilifolium L. Upland Boneset. 



Dry cliffs and talus of ravines and on steep banks in the less acid soils ; scarce. 

 Aug.-Sept. 



Enfield Glen (D.) ; Fall Creek Gorge, below Ithaca Falls (D.\) ; near the 

 "Nook" (D.) ; Cayuga Lake shore, s. of Shurger Glen (£>.!) and n. of Myers 

 Point (£>.). 



Vt. and Mass. to 111., southw. to Ga., Ala., and Mo. ; infrequent or rare on the 

 Coastal Plain. 



5. E. urticaefolium Reich. (E. ageratoides of Cayuga Fl.) White Snakeroot. 



Damp shaly ravine banks and damp shady gravelly hillsides, in more or less 

 calcareous soils ; common. Aug.-Sept. 



Rare or absent on the more residual acid soils of the higher hills of the basin, 

 and in the sandy regions n. of Cayuga Lake. 



N. B. to Nebr., southw. to Fla. and La. ; infrequent or more often absent on the 

 Coastal Plain. 



2. Mikania Willd. 

 1. M. scandens (L.) Willd. 



Wet thickets bordering streams, and in marshes, in more or less brackish regions ; 

 locally frequent. Aug. 



Cayuga Marshes (£>.!) ; Spring Lake. 



S. Me. to w. Ont., southw. to Fla., Miss., and Tex., chiefly near the coast. Found 

 also in W. I. and S. A. 



3. Grindelia Willd. 

 1. G. squarrosa (Pursh) Dunal. 



Dry gravelly pastures, in nonacid soils ; rare. Aug.-Sept. 



Pasture between C. U. barns and Forest Home ; recently introduced as a weed 

 from the West. First noted in 1913, but now apparently well established. 



111. to Man., southw. to Mo., Tex., Nev., and Mex. ; adventive in Conn., N. Y., 

 and N. J. 



4. Solidago L. 



a. Heads paniculate, thyrsoid, or in axillary clusters. 



b. Involucral bracts strongly squarrose. 1. S. squarrosa 



b. Involucral bracts with erect or appressed tips. 

 c. Flowers cream color. 2. S. bicolor 



c. Flowers yellow. 

 d. Heads mostly in axillary clusters. 



e. Leaves lanceolate. 3. S. caesia 



e. Leaves ovate or oval. 4. S. latifolia 



d. Heads in a terminal panicle. 



e. Leaves markedly increasing in size down the stem ; lower and radical leaves 

 usually present. 

 /. Foliage glabrous and smooth, or nearly so; stem slightly angled or terete. 

 g. Heads not secund on the branches of the panicle. 5. 5". humilis 

 g. Heads secund. 

 h. Lower leaves lanceolate or oblong-lanceolate, inconspicuously toothed. 

 i. Branches of the panicle pubescent ; panicle narrow ; plants of wet 

 soil. 

 /. Leaves linear-lanceolate, the upper ones much reduced and 



narrow. 6. S. uniligulata 



j. Leaves oblong-lanceolate, the upper ones elliptic-lanceolate, not 

 so reduced. 6a. S. uniligulata, 



var. neglecta 



