62 



Equisetaceae 



Equisetum 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



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Nov. 



Dec. 



50 



Map 50 



Equisetum fluviatile L. 



50 



Map 5 

 Lycopodium Selago 



var. patens (Beauv.) Desv. 



Jan. 



Feb 



Mar. 



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Dec. 







Map 52 



Lycopodium lucidulum Michx. 



species much resembles the next one and is closely associated with it. 

 Lab. to Alaska, southw. to Maine, N. Y., and Wyo. ; also in Eurasia. 



4. Equisetum Nelsoni (A. A. Eaton) Schaffner. (Equisetum variegatum 

 var. Nelsoni A. A. Eaton.) Nelson Scouring-rush. Map 46. Wet, moist, 

 or dry, sandy borders of lakes and sloughs. 



N. Y. to Mich., Ind., and 111. 



5. Equisetum prealtum Raf. (Equisetum hyemale var. affine (En- 

 gelm.) A. A. Eaton). Tall Scouring-rush. Map 47. Infrequent through- 

 out the state. It is usually found in rather moist, sandy soil and on the 

 slopes of the banks of streams ; sometimes the habitat may even be springy. 

 It grows in colonies, and these sometimes may extend along the bank for 

 several rods. It rarely occurs in other habitats but is found along railroad 

 embankments and in wet prairie habitats. 



Canada to Mex. 



6. Equisetum laevigatum A. Br. Smooth Scouring-rush. Map 48. 

 Infrequent in sandy to very sandy soil in the greater part of the state. It 

 is most commonly found on railroad embankments and less frequently in 

 moist, sandy soil of the slopes of the banks of streams and lakes. 



Conn., N. J. to B. C, southw. to N. C, La., and Mex. 



7. Equisetum kansanum Schaffner. (Equisetum laevigatum of A. A. 

 Eaton, not A. Br.) Kansas Scouring-rush. Map 49. Infrequent in north- 

 ern Indiana and probably rare in the southern part of the state. It has a 

 very wide range of habitat but is most frequently found in moist soil in 

 prairies; it is, however, also found on the wet, marl borders of lakes and 

 other moist habitats. 



Mainly in the western Mississippi Basin, Ohio to Mont, and B. C, 

 southw. to Mo., N. Mex., Ariz., and Calif. 



8. Equisetum fluviatile L. Water Horsetail. Map 50. Infrequent in 

 northern Indiana in marshes and bogs, in the dune area on the low borders 

 of sloughs, and rarely in wet prairies. 



Newf. to Alaska, southw. to Va., Nebr., and Oreg. ; also in Eurasia. 



