20 



POLYPODIACEAE. 



VOL. I. 



6. Dryopteris Clintoniana (D. C. Eaton) 

 Dowell. Clinton's Fern. Fig. 42. 



Aspidium cristatuin var. Clint onianum D. C. Eaton in Gray, 



Man. ed. 5, 665. 1867. 

 Dryopteris cristata var. Clintoniana Underw. Native Ferns, ed. 



4, 115. 1893. 

 Dryopteris Clintoniana Dowell, Proc. Staten Id. Assoc. Arts 



& Sc. i : 64. 1906. 



Rootstocks stout, creeping, densely chaffy. Leaves 2\-^\ 

 high; stipes i or more long, straw-colored or brownish, 

 with thin concolorous or often dark-centered scales; blades 

 i2-3 long, s'-io' broad, oblong to ovate-oblong, acute or 

 acuminate, deeply bipinnatifid ; pinnae apart, oblong-lanceo- 

 late, broadest at the base, or lower ones unequally elongate- 

 triangular, deeply pinnatifid; segments oblong, usually ob- 

 tuse, serrate, or the basal ones pinnately cut ; sori 3-7 pairs, 

 borne near the midvein ; indusia orbicular-reniform, glabrous. 



In swampy woods, Maine and Ontario to Wisconsin, and 

 North Carolina. Often confused with the preceding and the 

 following species. 



7. Dryopteris Goldiana (Hook.) A. Gray. 

 Goldie's Fern. Fig. 43. 



Aspidium Goldianuin Hook. Edinb. Philos. Journ. 6: 



333. 1822. 

 Dryopteris Goldiana A. Gray, Man. 631. 1848. 



Rootstock stout, ascending, chaffy. Leaves up to 

 54 long, in a crown ; stipes io'-i8' long, densely cov- 

 ered below with large lanceolate usually dark lus- 

 trous scales ; lamina 2-4 long, io'-i6' broad, ovate 

 to oblong, short-acuminate, nearly glabrous, dark 

 green above, nearly 2-pinnate ; pinnae 6'-g' long, i'-2 x 

 broad, broadly lanceolate to oblong-lanceolate, broad- 

 est above the base, acuminate, ninnatifid almost to 

 the midrib ; segments about 20 pairs, narrowly ob- 

 long, acute or subacute, subfalcate, serrate, the teeth 

 appressed ; sori 6-10 pairs, near the midrib, distinct; 

 indusia glabrous, nearly orbicular, the sinus narrow. 



In rich woods, New Brunswick to Minnesota, south 

 to North Carolina, Tennessee and Iowa. Ascends to 

 5000 ft. in Virginia and to 2500 ft. in Vermont. July- 

 Aug. Goldie's Wood-fern. 



8. Dryopteris marginalis (L.) A. Gray. Evergreen Wood-fern. Fig. 44. 



Polypodium mar gin ale L. Sp. PI. 1091. 1753. 

 Aspidium marginale Sw. Syn. Fil. 50. 1806. 

 Dryopteris marginalis A. Gray, Man. 632. 1848. 



Rootstock stout, woody, ascending, densely covered 

 whh bright brown shining scales, the leaves borne in a 

 crown. Stipes 4'-io' long, chaffy below; blades ovate- 

 oblong or ovate-lanceolate, chartaceo-coriaceous, 6'-2& 

 long, nearly or quite 2-pinnate, acuminate, usually a 

 little narrowed at the base ; pinnae numerous, sessile or 

 nearly so, glabrous, 2' -5' long, the lowermost unequally 

 deltoid-lanceolate, those above lanceolate to broadly 

 oblong-lanceolate, acuminate; segments oblong or lan- 

 ceolate, obtuse or subacute, subfalcate or falcate, sub- 

 entire, crenate or pinnately lobed, partially adnate or 

 the lowermost distinct ; sori distant, close to the mar- 

 gin ; indusia orbicular-reniform, glabrous. 



In rocky woods and on banks Nova Scotia to British 

 Columbia, south to Georgia, Alabama, Arkansas, Kansas 

 and Oklahoma. Ascends to 5000 ft. in Virginia. Leaves 

 evergreen. July-Aug. Marginal Shield-fern. 



