A CHECKLIST OF THE NORTH AMERICAN 

 FERNWORTS. 



{Continued.) 



45- Asplenium ebeneum Ait. Ebony Spleenwort; 

 Screw Fern. Common ; in dry, or moist, rocky 

 soils. Maine and Ontario to Florida, Texas and 

 Colorado ; also in the West Indies, Equador and 

 Cape Colony. — A. platy neuron (L). 



The form serratum Miller is an incised form 

 occurring with the type ; f 4 Hortonae Dav. more 

 deeply cut is reported from Vermont, Maryland 

 and Arkansas; f. prolife?um D. C. Eaton is a pro- 

 liferous form from Florida. 



46. Asplenium ebenoides R. R. Scott. Rare and local; 



on dryish rocks. Vermont to Virginia, Alabama 

 and Illinois. Regarded as a hybrid between 

 Camptosorus rhizophyllus and Asplenium ebeneum. 



47. Asplenium firmum Kunze. Rare ; in moist shades, 



Florida and Arizona; also in the West Indies. 

 Guatemala to Brazil and Peru. 



48. Asplenium Glenniei Baker. Very rare. Huachuca 



Mountains, Arizona. 



49. Asplenium monanthemum L. Rare. Huachuca 



Mountains, Arizona; also in the West Indies and 

 Africa. — A. Monanthes L. 



50. Asplenium montanum Willd. Mountain Spleen- 



wort. Rare ; on dryish rocks. Connecticut and 

 New York to Georgia, Alabama and Arkansas. 



51. Asplenium muticum Gilbert. Rare; on moist 



rocks. Southern Florida; also in Bermuda. 

 Often confused with forms of A. trichomanes 

 and A. parvulum, and occasionally referred to 

 A. Anceps Solander. 



