Dryopteris 



POLYPODIACEAE 



49 



50 



Map 20 



Dryopteris spinulosa (O.F.Muell.) Wan 



50 



Map 20a 

 Dryopteris spinulosa 

 var. intermedia (Muhl.) Underw. 



Map 21 

 Dryopteris Boottii (Tuckerm.) Underw. 



X Dryopteris cristata X spinulosa C. Chr. is a closely allied form which 

 is represented in my collection by a single specimen. It is my no. 54091 

 from Lagrange County, which was determined by C. A. Weatherby. 



7. Dryopteris spinulosa (0. F. Muell.) Watt. (Aspidium spinulosum 

 (O. F. Muell.) Sw.) (Amer. Fern Jour. 26: 65-69. 1936.) Toothed Wood- 

 fern. Map 20. The greater number of specimens are from the lake area 

 where it is usually frequent in wet woods, especially about ponds, in 

 tamarack bogs, and on the wet, wooded borders of lakes. Sometimes it is 

 found in dry woods after the water level has been lowered. This is one of 

 our commonest and most attractive ferns. It usually grows in clusters of 

 from 5 to 10 fronds. 



Lab. to the Selkirks and Idaho, southw. to Va. and Ky. 



7a. Dryopteris spinulosa var. fructuosa (Gilbert) Trudell. (Rhodora 

 28: 146. 1926.) My specimens are from tamarack bogs and very low 

 woods. I have no data concerning its general distribution. 



7b. Dryopteris spinulosa var. intermedia (Muhl.) Underw. (Rhodora 

 21: 178. 1919 and Rhodora 22: 196. 1920.) (Aspidium spinulosum var. 

 intermedium (Muhl.) D. C. Eaton and Dryopteris intermedia (Muhl.) 

 Gray.) Common Woodfern. Map 20a. I have only a few specimens of 

 this fern although it has been reported from 10 counties not shown on the 

 map. It has a wide distribution in the state and seems to favor wooded 

 ravines. 



Newf. to Wis., southw. to N. C. and Mo. 



8. XDryopteris Boottii (Tuckerm.) Underw. (Aspidium Boottii Tuck- 

 erm.) Boott Woodfern. Map 21. I reported this fern from Noble and 

 Wells Counties but I now refer my specimens to other species. R. M. Tryon, 

 Jr. has found it in La Porte and Porter Counties. His determinations have 

 been checked by fern specialists. This species is regarded by some fern 



