394 Karl M. Wiegand and Arthur J. Eames 



Hollow (D.) ; and elsewhere. A pale pink form (forma rosea St. John, see 

 Rhodora 21:217, 1919) occurs n. of Spencer Lake and in Summit Marsh. 



S. N. B. to Ont., Kans., and Colo., southw. to Fla. and Tex.; frequent on the 

 Coastal Plain, where it apparently inhabits more acid soils than here. 



2. L. siphilitica L. Great Lobelia. 



Calcareous springy places ; abundant. Aug.-Sept. 



Generally distributed throughout the basin where calcareous springs occur ; rare 

 in the more acid regions on the higher hills. 



Me. and Ont. to S. Dak. and Colo., southw. to Ga., La., and Kans. ; rare or absent 

 on the Coastal Plain. 



3. L. spicata Lam. 



Damp sandy pasture lands ; rare. July-Sept. 



About one mile e. of McLean (L. H. MacDaniels, A. J. £., & K. M. IV.) ; first 

 detected in 1915 and appearing as though recently introduced. 



Native : P. E. I. to Sask., southw. to Fla., Ala., and Tex. ; frequent on the Coastal 

 Plain. 



This species generally inhabits neutral or slightly acid sandy or gravelly soils. 



4. L. inflata L. Indian Tobacco. Lobelia. 



Dry open soils of various types ; common.- July-Sept. 



Generally distributed throughout the basin, and appearing like a weed ; less 

 abundant in the richer soils. 



Lab. to Sask., southw. to Ga., Kans., and Ark., including the Coastal Plain. A 

 well-known poisonous medicinal plant. 



5. L. Kalmii L. 



Wet marly ledges, springs, and shores; frequent. July-Sept. 



Newf. to Man. and Minn., southw. to N. J., Ohio, Mich., and Iowa; rare or 

 absent on the Coastal Plain and in acid N. E. 



Two forms occur in the Cayuga Lake Basin: 



(a) Strict, slender, usually unbranched; the branches, if present, erect; leaves 

 narrowly linear. Marly shores and bogs: Spencer Lake; Larch Meadow (D.) ; 

 Farley Point (D. !) ; Yandemark Pond; Lowery Ponds; Miller Bog, Spring Lake. 



(6) Lower, stouter, more diffuse, often much branched; leaves longer and pro- 

 portionally broader, linear-oblanceolate. Marlv ledges in the ravines and on the 

 lake shores: Enfield Glen (£>.) ; Buttermilk Glen (D. !) ; Six Mile Creek (£>.); 

 Cascadilla Glen {D.) ; Fall Creek Gorge (D.\) ; Taughannock Gorge (D. !) ; Salmon 

 Creek ravine (D. !). 



Whether these forms are more than ecological in nature is not at present known. 



125. COMPOSITAE (Composite Family) 



Artificial Key to the Genera 



page 



a. Flowers of the head tubular, or only the marginal ones ligulate; juice not 



"milky. (2d a, p. 396.) 



b. Involucre of the pistillate flowers closed and woody ; heads unisexual, not 



radiate, the staminate and the pistillate heads very different in appearance. 



c. Pistillate heads forming an oblong or an oval bur, covered with hooked 



or rarely straight spines 15. Xanthium 414 



c. Pistillate heads obovoid, small, with a few acute tubercles at the summit. 



14. Ambrosia 413 



