40 



OSMUNDACEAE 



Osmunda 



3b. Botrychium dissectum var. tenuifolium (Underw.) Farw. I have 

 a specimen of this variety collected in a low woods about 3 miles northwest 

 of Leavenworth, Crawford County, which is referred to this variety by 

 both R. T. Clausen and E. T. Wherry. This variety is found chiefly in the 

 southern states. 



3c. Botrychium dissectum var. oneidense (Gilbert) Farw. According 

 to Clausen's determination this variety occurs in De Kalb, Howard, Porter, 

 and Steuben Counties. 



4. Botrychium virginianum (L.) Sw. Rattlesnake Fern. Map 5. 

 This is strictly a woodland species and is found in moist, rich woods of 

 many kinds throughout the state. For a treatment of the varieties of this 

 species and a key to them see Butters' discussion (Rhodora 19: 207-215. 



1917). 



Lab. to B. C, southw. to Fla., La., Ariz., and Wash. ; also in Mex., W. I., 



and Eurasia. 



2. OSMUNDACEAE R. Br. Royal Fern Family 



1. OSMUNDA [Tourn.] L. 



Fronds bipinnate, the fertile ones fertile at the summit. . .1. 0. regalis var. spectabilis. 

 Fronds pinnate, the sterile pinnae deeply pinnatifid, the lobes generally entire. 



Fertile fronds with fertile pinnae near the middle; no tuft of wool at the base of 



the pinnae 2 - 0. Claytoniana. 



Fertile fronds separate from the sterile ones; pinnae of sterile fronds with a tuft 

 of wool in the axils. 

 Pinnae of sterile fronds with entire segments and the fertile frond entirely fertile. 



3. O. cinnamomea. 



Pinnae with the basal segments on the lower side (or rarely on both sides) much 

 elongated and deeply and sharply toothed, other segments normal or nearly 



so 3a. 0. cinnamomea f. auriculata. 



Pinnae (at least some of them) of fertile fronds more or less sterile (usually the 



lower ones) 3b. 0. cinnamomea f. frondosa. 



Pinnae (at least some of them) of sterile fronds with lobes more or less cut or 

 pinnatifid 3c. 0. cinnamomea f . incisa. 



Miles 

 56 



Map 6 



Osmunda regalis 

 var. spectabilis (Willd.)Gray 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



Aug. 



Sept 



Oct 



Nov. 



Dec. 



Miles 



^30 



Map 7 



Osmunda Claytoniana L 





 Map 8 



Osmunda cinnamomea L. 



