68 FLORA OF MICHIGAN. 



\ 



* 9. H. acutiloba, DC. Th. 



This species is very common on beech and maple land, while H. triloba prefers oak soil. No transi- 

 tion forms have been seen. 



4. ANEMONELLA, Spach. 



*10. A. tlialictroid.es, Spach. Rue- Anemone. C. &S. 



Quite local through the center. Flowers very pretty, white, sometimes pink. Found usually on oak 

 soil. 



5. THALICTRUM, Tourn. MEADOW-RUE. 



* 11. T. dioicum, L,. Early Meadow-Rue. . Th. 

 Common, along river banks. 



* 12, T. purpurascens, L. Purplish M.-Rue. Th. 



The flowers vary from white to deep purple, the fertile ones occasionally bearing stamens. Wet 

 meadows. Common. 



6. RANUNCULUS, L. CROWFOOT. BUTTERCUP. 



*13. R. circinatus, Sibth. Stiff Water-Crowfoot. Th. 



Bear River, Petoskey, E. J. Hill; Ann Arbor, Allmendinger Cat.; Huron E., Lyons; etc. The 

 common form in L. P. Frequent. 



14. R. aquatilis, L., var. tricliophyllus, Gray. Common White Water- 

 Crowfoot. 



Not observed in E. and S. Black Lake, Cheboygan Co., B. & K.; Keweenaw Co., F. 



15. R. Cymbalaria, Pursh. Sea-side Crowfoot. 

 South Haven, L. H. Bailey. Bare. 



* 16. R. multifidus, Pursh. Yellow Water-Crowfoot. Th. 



Flowers an inch and three-eighths in diameter and full double have been seen. Ponds and plow 

 streams. Perennial by rooting from the nodes of floating stems after flowering. The young plants root- 

 ing in mud are pubescent so far as observed in many parts of the State. Common. 



17. R. ambigens, Watson. Water Plantain Spearwort. 

 Dr. Lyons. Not observed in C. and 8. St. Clair Co., A. F. Foerste. 



18. R. Flammula, L., var. intermedius, Gray. 

 Keweenaw Co., F. 



19. var. reptans, E. Meyer. Creeping Spearwort. N. & U. P. 



Infrequent except northward, and not seen in the center of the State. Sandy shore of Black Lake, 

 Cheboygan Co., B. & K. 



20. R. rhomboideus, Goldie. 



On light sand: our earliest spring flower. Muir and Palo in Ionia county; Lake Superior, Can. Cat. 

 Prairies, Mich.," Gray. Rare. 



*21. R. abortivus, L. Small-flowered Crowfoot. Th. 



Common. 



22. var. micraiitlms, Gray. 



North shore of Lake Superior, Agassiz ; Keweenaw Co., F. 



* 23. R. sceleratus, L. Cursed Crowfoot. Th. 

 Ditches and low ground. Exceedingly variable, stems sometimes two inches in diameter. Frequent. 



*24. R. recurvatus, Poir. Hooked Crowfoot. Th. 



Woods in rich soil. Common. 



*25. R. fascicularis, Muhl. Early Crowfoot. 



F.'owers sometimes double, or with reversion of essential organs to leaves. Hills and sandy plains. 

 Infrequent, from the center of the State southward. 



*26. R. septeiitrionalis, Poir. Th. 



Frequent and variable. 



*27. R. Pennsylvauicus, L. f. Bristly Crowfoot. Th. 



Frequent. 



[R. HISPIDUS, Hook. 



> T . shore, L. Superior, Gray's Man., 6th Ed. May be looked for in this State.] 



