418 Karl M. Wiegand and Arthur J. Eames 



e. Corolla orange, goblet-shaped, 5-toothed ; stamens exserted ; achenes 4-6 



mm. long, warty, the outer ones 3-awned, the inner ones 4-awned, the 



margins with mixed ascending and reflexed barbs ; outer involucre 



rarely much exceeding the disk. 



/. Leaves nearly sessile, some 3-lobed. 9. B. connata 



f. Leaves slender-petioled, none lobed. 9a. B. c, var. petiolata 



1. B. Beckii Torr. Water Marigold. 



Floating in the still water of shallow lakes and mill ponds ; rare. Aug. 



Cayuta Lake, in n. w. part (D.) ; Lake Como (Locke Pond, D.) ; Cayuga Lake, 

 at Cayuga Bridge (IV. W . Rowlee & K. M. IV.). [Homer and Cortland mill 

 ponds (D.\).] Locally this species usually occurs in calcareous waters. 



Que. to Man., southw. to N. J. and Mo. ; infrequent or rare on the Coastal Plain. 



This plant is distinctly a Bidens. To separate it as a distinct genus, as is done by 

 some botanists, seems unwarranted. 



2. B. bipinnata L. Spanish Needles. 



Lake Ridge Point, 1880 (D.) ; "Ovid" (S. H. Wright, D.) ; L. V. R. R. yards, 

 Ithaca, 1925 (W . C. Muenscher). Probably not native. 

 R. I. to Nebr., southw. to Fla., Kans., and Ariz. 



3. B. cernua L. 



Ditches and muddy shores, mostly in limy regions; frequent. Aug. 25-Oct. 

 Magdalen Islands to Hudson Bay and B. C, southw. to N. C, Mo., and Calif.; 

 infrequent on the Atlantic Coastal Plain. Found also in Eurasia. 



3a. B. cernua L., var. elliptica Wiegand. (See Bui. Torr. Bot. Club 26:417. 1899. 

 B. chrysanthemoidcs of Cayuga Fl.) 



Ditches and low grounds about marshes ; very common. Sept.-Oct. 



P. E. I. to B. C. and Oreg., southw. to Ky. and Kans. ; less frequent along the 

 Atlantic coast. 



3b. B. cernua L., var. minima (Huds.) DC. (See Rhodora 24:207. 1922.) 

 Sphagnum bogs and springy boggy places ; rare. Aug. 25-Sept. 

 Summit Marsh; Chicago Bog; Beaver Brook; Slavton Pond (L. F. Randolph, 



A. J. E., & K. M. IV.). 



Magdalen Islands to N. H., N. Y., and Lake Superior. Found also in Eu. 



4. B. laevis (L.) BSP. 



Partly floating in deep ditches and swales in the larger marshes ; rare. Sept. 



Confined to the Ontario plain: Cayuga Marshes (Clinton) ; along Black Creek w. 

 of Savannah (K. M. W ., A. J. E., & L. P. Randolph) ; Spring Lake village (same 

 collectors). 



Mass. to Ga., along the coast; also cent. N. Y. and Calif. 



[B. trichosperma (Michx.) Britton. (Coreopsis trichospcrma of Cayuga Fl.) 



Tick-seed Sunflower. 

 "Specimen in herb., from head of Cayuga Lake, Oct., 1879, (F. C. Curtice)" 

 (D.. and in C. U. Herb.) ; not seen since. 

 Mass. to Va., near the coast; also, N. Y. to 111. and Ky.] 



5. B. discoidea (T. & G.) Britton. (Coreopsis discoidea of Cayuga Fl.) 

 On floating logs or boggy shores about peat bogs ; rare. Sept. 



Spencer Lake, 1922; Dryden Lake (H.\). Dudley's station, "near Cayuga L., 

 on the Marsh," is probably a mistake. 

 Mass. to Mich., southw. to Va., Ohio, La., and Tex., including the Coastal Plain. 



