—ii9— 



13- Ophioglossum palmatum Plumier. Rare. Florida; 



also in tropical America. — Cheiroglossa palmata 

 (L.). 



14- Ophioglossum pusillum Nutt. Rare. Georgia and 



Florida to Texas. — 0. nudicaule L. f. 



15. Ophioglossum vulgatum L. Common Adder's- 



tongue. Not uncommon : in moist meadows and 

 pastures. Southern Canada to the Gulf of Mex- 

 ico west to California: also in Europe, Asia, 

 Africa and Australia. 



The form arenarium is a depauperate form from 

 New Jersey (O. arenarium E. G. Britton) ; f, 

 Alaskanum is from Unalaska (O. Alaskanum E. 

 G. Britton) ; f, Engelmanni is an apiculate form 

 from Virginia to Missouri and Arizona (O. Engel- 

 manni Prantl.). 



OSMUND ACE.E. 

 Osmund a L. 



16. Osmunda cmnamomea L. Cinnamon Fern ; Brake. 



Abundant; in wet woods, open swamps and in 

 pastures. Florida and the Mississippi Valley to 

 Nova Scotia; also in the West Indies, Japan and 

 Eastern Asia. 



The form frondosa Gray with sporophylls partly 

 changed to vegetative organs occurs with the 

 type ; f. glandulosa Waters is a form with glandu- 

 lar fronds found in dryish situations; f. mcisa 

 Huntington is an incised form occurring with 

 the type. 



17. Osmunda Claytoniana L. Interrupted Fern. 



Abundant; in wet woods and swamps and along 

 moist roadsides. North Carolina and Missouri, 

 northward; also in India. The form dubia 

 Grout is a dissected form from Vermont. 



18. Osmunda regalis L. Royal Fern; Flowering 



Fern. Abundant; in moist shades and swamps 



