286 /'rocccdiiigs of ih.e Ohio State Academy of Science. 



at the base, ratlier firm, one to three feet \o\v^\ ])innae lanceolate 

 or triangular ovate, acuminate; ])eti<)le with lars;e scales. In 

 moist woods and swam]:»s. (jcneral. 



The form D. cristata cUntoniana ( Mat. ) rnd. has oblong- 

 lanceolate pinnae which are broadest at the base. Wayne county. 

 ( (jcauga count}-, Hopkins.) 



4. Dryopteris i^oldirami ( Hixjk. ) ( ir. ( ioldie's Shielfl-fern. 



Rhizome stout and chatty: leaves broadly ovate, rather firm, 

 two to four feet long; petioles chafi'y at least below. In rich 

 woods. Rather general, but no specimens from the southern 

 third nor from the northeastern counties. 



5. Dvxoptcris iiiari^inalis ( L. ) ( ir. Marginal Shield-fern. 



Rhizome ascending, stout with ])rown shining scales; leaves 

 evergreen, ovate-oblong or ovate-lanceolate, subcoriaceous, two 

 to three feet long ; petiole chafify ; sori near the margin of the 

 segments. In woods or on rocks. General in Ohio and common. 



6. Dryoftcris spinuldsa ( Retz. ) Ktz. Spinulose Shield-fern. 



Rhizome chafl:'\' ; leaves evergreen, ovate-lanceolate, the pin- 

 nae obli(|ue to the rachis ; |)innae elongated-triangular; jjetiole 

 with a few deciduous scales; indusium glabrous. In rich woods, 

 (jeneral in Ohio. 



The form. D. sl^iiiitlosa intcniicdia ( Muhl. ) I'nd.. has ob- 

 long-lanceolate spreading pinnae and the indusium beset with 

 stalked glands. Rather general in Ohio. 



The form. D. spiiiiilosa dilatafa ( Hoffm. ) Und.. with 

 broadlv ovate or triangular-ovate, commonlv three-])innate 

 leaves and glabrous indusia has been found ])y llo])kins in Tus- 

 carawas county. 



7. Dr\opteris bootfii (Tuck.) Und. Boott's Shield-fern. 



Rhizome ascending ; leaves elongated-oblong or lanceolate, 

 thin, acuminate at the apex, slightly narrowed at the base ; petiole 



