Genus 3. FERN FAMILY. 13 



3. Woodsia glabella R. Br. Smooth Woodsia. Fig. 25. 



Woodsia glabella R. Br. App. Franklin's Journ. 754. 

 1823. 



Rootstocks small, ascending, densely clustered. 

 Stipes very slender, usually stramineous, jointed 

 above the base ; blades delicate, linear or narrowly 

 lanceolate, 2-5' long, 4"-8" wide, once pinnate; 

 pinnae deltoid to roundish-ovate, crenately lobed, 

 glabrous, the lower pinnae remote, obtuse, often 

 somewhat smaller than the middle ones ; sori few, 

 distinct or with age confluent; indusium minute, 

 with 6-10 hair-like incurved or radiating segments. 



On moist rocks, Labrador to Alaska, south to New 

 Brunswick, northern New England, northern New York 

 and British Columbia. Also in Greenland and arctic 

 and alpine Europe and Asia. Summer. 



4. Woodsia scopulina D. C. Eaton. Rocky Mountain Woodsia. Fig. 26. 



Woodsia scopulina D. C. Eaton, Can. Nat. 2: 90. 1865. 

 Woodsia Cathcartiana Robinson, Rhodora 10: 30. 1908. 



Rootstock short, creeping, densely chaffy, the nu- 

 merous leaves borne close together. Stipes 2' -6' 

 long, not jointed, bright rusty or chestnut-colored 

 at the base, paler above; blades lanceolate, 6'-i2' 

 long, finely glandular-puberulent and usually his- 

 pidulous with jointed whitish hairs; pinnae numer- 

 ous, oblong-ovate, deeply pinnatifid into 10-16 oblong 

 toothed segments, or fully pinnate, the larger pin- 

 nules nearly free and deeply incised; indusium con- 

 cealed, cleft into narrow or slender spreading flaccid 

 segments. 



In crevices of rocks, Michigan and western Ontario 

 to British Columbia, south in the Rocky Mountains to 

 Arizona and in the Sierra Nevada to California. Also 

 in Gaspe County, Quebec. Summer. 



5. Woodsia oregana D. C. Eaton. Oregon Woodsia. Fig. 27. 



Woodsia oregana D. C. Eaton, Can. Nat. II. 2 : 90. 

 1865. 



Rootstock short, creeping, chaffy, the numerous 

 leaves very densely clustered. Stipes not jointed, 

 brownish and chaffy below, paler or stramineous 

 above, glabrous ; blades 2'-io' long, elliptic-lanceolate, 

 deeply bipinnatifid or partially bipinnate, the sterile 

 shorter than the fertile ; pinnae glabrous, deltoid- 

 oblong, obtuse, deeply pinnatifid, the lower smaller 

 and remote; segments oblong or ovate, obtuse, ad- 

 nate or the largest nearly free, dentate or crenate, the 

 teeth often revolute and covering .the submarginal 

 sori ; indusia minute, concealed, consisting of a few 

 short whitish turgid hair-like segments. 



British Columbia and Athabasca to Manitoba, Wis- 

 consin, northern Michigan, Nebraska, Oklahoma, Colo- 

 rado, Arizona and California. Also in eastern Quebec. 

 July-Aug. 



