FERN FAMILY 



15 



4. Dryopteris oreopteris (Ehrh.) ]^Iaxon. 

 ^lountain Wood-fern. Fig. 28. 



Polvpodium montaitum Vogler, Diss. Pol. Mont. 1781, not Lain. 



1778. 

 Polypodium oreopteris Ehrh.; Willd. Fl. Berol. Prodr. 292. 1787. 

 Dryopteris montaita Kuntze, Rev. Gen. PI. 2: 813. 1891. 



Drvopteris oreopteris Ma.xon, Proc. U. S. Nat. Mus. 23: 638. 

 "1901. 



Rhizome rather stout, short-creeping or ascending, 

 scales yellowish brown, thin, ovate-lanceolate. Fronds 

 few, close, terminal, ascending, 40-110 cm. long; stipes 

 verj' short, sulcate, stramineous from a dark chafify 

 base ; blades narrowly to broadly lanceolate, or oblance- 

 olate, abruptly acuminate, 30-85 cm. long, 10-22 cm. 

 broad at the middle, tapering to a narrow base, pinnate- 

 pinnatifid : pinnae oblong-lanceolate or narrowly del- 

 toid-lanceolate (the basal ones often greatly reduced, 

 ovate or deltoid-ovate), deeply pinnatifid, the midrib 

 minutely hairy or subglabrous beneath ; segments 

 spreading, oblong, obtuse, membranous, more or less 

 glandular, subentire, the margins finely hyaline-papil- 

 lose; veins simple or 1-forked; sori rather small, sub- 

 marginal ; indusia roundish-reniform, toothed, glan- 

 dular, deciduous. 



Rocky mountain-slopes, often along streams, Hudsonian Zone; Alaska to northern Washington (Stehekin 

 River region); Europe; Japan. Type locality, European. 





5. Dryopteris oregana C. Chr. 

 Sierra Wood-fern. 





Fig. 29. 



Aspidium nevadense D. C. Eaton, Ferns X. Am. 1 : 7i. pi. 10. 

 1878, not Boiss. 1838. 



Dryopteris nevadensis Underw. Nat. Ferns ed. 4, 113. 1893. 



Dryopteris oregana C. Chr. Ind. Fil. 84. 1905. 



Rhizome slender, creeping, the apical portion covered 

 with the imbricate stipe-bases of old fronds ; scales 

 ovate, yellowish brown, thin, concave, slightly toothed. 

 Fronds few, in a close terminal crown, 50-90 cm. long; 

 stipes slender, stramineous, much shorter than the 

 blade, nearly naked ; blades elliptic-lanceolate, acu- 

 minate, 40-60 cm. long, 10-16 cm. broad, long-attenuate 

 to a very narrow base, pinnate-pinnatifid ; pinnae sessile, 

 horizontal, the larger ones close, linear to oblong-linear, 

 acuminate to subcaudate, the basal ones usually dis- 

 tant, minute ; segments close, oblong, obtuse or acutish, 

 slightly oblique, membranous, entire or obscurely cre- 

 nate, with a few deciduous cilia, minutely resinous- 

 glandular ; veins oblique, mostly simple, slightly hairy 

 lieneath ; sori small, submarginal ; indusia minute, long- 

 ciliate, glandular. 



Moist meadows and forested slopes, Canadian and Transition Zones; Sierra Nevada of northern Cali- 

 fornia (Mariposa, Butte, Plumas, and Trinity Counties) northward to western Oregon (Josephine and Lane 

 Counties). Type locality: Quincy, Plumas County, California. 



