52. Asplenium myriophyllum Mett. In moist shades. 

 Florida; also in the West Indies. — A. rhizophyl- 

 lum myriophyllum Mett. The forms of this 

 species in the United States have recently been 

 named A. verecundum and A. Curtissii by 

 Underwood. 



53- Asplenium myriophyllum Biscaynianum D. C. 



Eaton. Rare. Southern Florida. Regarded as 

 a species by some botanists. — A. Biscaynianum 

 A. A. Eaton. 



54. Asplenium parvulum Mart. & Gal. Small Spleex- 

 wort; Little Ebony Spleenwort. Tolerably 

 common ; in dryish rocky soil. Virginia to 

 Florida, Kansas and Texas; also in Jamaica. — 

 A. resiliens Kunze. 



55- Asplenium pinnatifidum Nutt. Pinnatifid Spleen- 

 wort. Rare and local ; on dryish rocks. New 

 York to Georgia, Alabama, Kansas and Missouri. 



56. Asplenium ruta-muraria L. Wall rue. Rue 

 Spleenwort. Tolerably common ; on dry rocks. 

 Southern Canada to Alabama. Missouri and 

 Michigan ; also in Europe and Asia to the Him- 

 alayas. 



57- Asplenium septentrionale (L.). Forked Spleen- 

 wort. Rare ; on rocks. Colorado to New 

 Mexico and Arizona; South Dakota; also in 

 Europe, northern Asia and the Himalayas. 



58. Asplenium serratum L. Rare; on the trunks of 



trees. Southern Florida; also in the West 

 Indies and Africa. 



59. Asplenium trichomanes L. Maidenhair Spleen- 



wort. Common; on shaded rocks, wet or dry. 

 Nearly throughout North America; also in north- 

 ern Europe and Asia and in the mountain tops 

 in the tropics. The form incisum Moore has 



