37- Adiantum tenerum Sw. Not common; on moist 

 calcareous rock. Southern Florida; also in the 

 West Indies and southward to Peru. 



38. Adiantum tricholepis Fee. Rare; in moist rocky 

 soil. Western Texas and New Mexico. 

 Aspidium Sw. 



39- Aspidium juglandifolium Kunze. Rare; in crevices 

 of rocks and in shaded rocky soil. Texas, New 

 Mexico and Arizona. — PJianerophlebia auriculata 

 Underw. 



40. Aspidium tr if oliatum Sw. Rare ; in moist shades. 

 Florida and Texas; also in the West Indies and 

 southward to Brazil and Peru — Tectaria trifo- 

 liata (L.). 



ASPLENIUM Sw. 



41- Asplenium angustifolium Michx. Narrow-leaved 

 Spleenwort; Swamp Spleenwort. Tolerably 

 common but unevenly distributed; in wet wood- 

 lands and open swamps. Southern Canada to 

 Georgia, Tennessee and Missouri. 



— . Asplenium auritum Sw. Reported from Sumter 

 County, Florida, on the strength of a single 

 frond said to have been collected there in 1894 

 and now in the herbarium of the New York 

 Botanical Garden. 



42. Asplenium Bradlcyi D. C. Eaton. Rare; on damp 

 shaded rocks. New York to Georgia, Arkansas 

 and Missouri. Specimens described as A. 

 Andrewsii Nelson are probably forms of this. 



43- Asplenium cicutarium Sw. Rare; in moist soil. 



Florida; also in the West Indies and Mexico 

 south to Peru ; in Guinea and Abyssinia. 



44- Asplenium dentatum L. Toothed Spleenwort. 



Rare; in lime "sinks." South Florida; also in 

 the West Indies, Mexico and Guatemala. — A. 

 tricJiomanes-dentatum L. 



