80 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



ASPLENIXJM. 



Sori curved; leaves flaccid, bipinnate, 0.5 to 1 m. long 1. .4. cydosoram. 



Sori straight; leaves firm, 6 to 20 cm. long, simply pinnate. 



Rachis brown ; leaf segments oval 2. A. (richomanes. 



Rachis green ; leaf segments ovate 3. -4 . viride. 



1. Aspleniiun trichomanes L. Sp. PI. 2: 1080. 1753.' Spleenwort. 

 Type locality: European. 



Range: Alaska to Nova Scotia, south to Arizona, Texas, and Alabama. 



Specimens examlned: Sncxjualmie Falls, Parker, August, 1892; Snoqualmie, Hind- 

 shaiv; East Seattle, Hindshaw; west Klickitat County, SwJtsdor/" 1228; Cape Horn, Pi/)er 

 4971; Quinault, Co/iard 220; Kirkland, Wiltentnyer. 



Zonal distriblttion: Humid Transition. 



2. Aspleniiim viride Iluds. Fl. Angi. 385. 1762. 



Type locality: "Habitat in rupibus humidis in comitatibus Eboracensi et Westmor- 

 landica," England. 



Range: Alaska to Oregon, Colorado, and Vermont. Europe. Asia. 



Speci-Mens examined: Wenache Region, Brandegee 1216; near Mount Baker, Flett. 



Zonal distribution: Hudsonian or Arctic. 



ATHYBITJM. 



1. Athyrium cyclosorum Rupr. Beitr. Pflanzenk. Russ. Reich. 3: 41. 1845. 

 Type ix)cality: " Petropawlowsk! et Unalaschka! Kadiak!" 

 Range: Ala.ska to Nebra.ska and California. Kamchatka. 



Specimens exa.mined: Olympia, Henderson, August 23, 1892; Stehekin, Whited 1387; 

 Stevens Pass, Sandberg cfc Leiherg 771; Skagit Pass, Lake cfc HvU, August 24, 1892; witli- 

 out locality, VoJtey in 1889; Clarks Springs, Kreager 34. 

 Zonal distribution: Humid Transition to Canadian. 



Tliis species has commonly been referred to A. filix-foemina (L.) Roth, from which it 

 appears amply distinct. 



POLYSTICHTJM. 

 Leaves simply pinnate. 



Leaf-stalk short; segments triangular or broadly lance- 

 olate 1. P. lonchitis. 



Leaf-stalk long; segments linear-lanceolate. 



Leaves 60 to 90 cm. long, the segments not over- 

 lapping 2. P. munilum. 



Leaves about 30 cm. long, the segments overlapping. . 2a. P. munitum imbricans. 

 Leaves bipinnate or bipinnatifid. 



Sori few ; leaves bipinnate at base 3. P. lemmoni. 



Sori numerous; leaves bipinnatifid at base 4. P. scopulinum. 



1. Polystichvun loncliitis (L.) Roth, Tent. Fl. Germ. 3: 71. 1800. Holly fern. 



Polyfwdium lonchitis L. Sp. PI. 2: 1088. 175:3. 



Aspidium lonchitis Sw. Schrad. Journ. Bot. 1800^: 30. 1801. 



Type locality: "Habitat in alpinis Helvetiae, Baldi, Arvoniae, Monspelii, Virginiae. " 



Range: Subarctic regions southward to California, Colorado, and Wisconsin. Europe. 

 Asia. 



Specimens examined: Olympic Mountains, Piper, August, 1895; Mount Rainier, Piper, 

 August, 1895; Goat Mountains, Allen, August 5, 1895; Skamania County, SuksdorJ 

 20.56; mountains near Ellensburg, Brandegee 1220; Fish Lake, Dunn, August 8, 1900; 

 Bridge Creek, Elmer 6.59. 



Zonal distribution: Arctic and Hudsonian. 



