FERN FAMILY. 



4. Woodsia scopulina D. C. Eaton. 

 Rocky Mountain Woodsia. (Fig. 19.) 



Woodsia scohiilina D. C. Eaton. Can. Nat. 2 : qo 

 1865- 



Rootstock short, creeping, densely chaffy. Stipes 

 2 / ~4 / long, not jointed, puberulent like the rachis 

 and lower surface of the leaf with minute flattened 

 hairs and stalked glands; leaves lanceolate, 6'-i2' 

 long, tapering from about the middle to both ends ; 

 pinnae numerous, oblong-ovate, pinuatifid into 

 10-16 oblong toothed segments ; indusium hidden 

 beneath the sporanges, very deeply cleft into short 

 cilia with cylindric cells 



II 



In crevices of rocks, northern Minnesota and 

 ern Ontario to Oregon, south in the Rocky Mountains 

 to Arizona and in the Sierra Nevada to California. 

 Summer. 



5. Woodsia Oregana D. C. Eaton. Oregon Wcxxlsia. Ki^. 20.) 



Woodsia Oregana D. C. K:itm. Can Nat 2:90. 1865. 

 // 'oodsia obtusa var. Lyallt 1868. 



Rootstock short. Stipes and leaves glabrous 

 throughout; stipes not jointed, brownish below; 

 leaves 2 / -io / long, elliptic-lanceolate, the sterile 

 shorter than the fertile ; pinnae triangular-oblong, 

 obtuse, pinnatifid ; lower pinnae reduced in i*e 

 and somewhat remote from the others; rachis 

 straw-colored ; segments oblong or ovate, dentate 

 or crenate, the teeth often reflexed and covering 

 the submarginal sori ; indusia minute, concealed 

 by the sporanges, divided almost to the centre into 

 a few beaded hairs 



On rocks, northern Michigan and Minnesota and 



M mitoba to British Columbia. ..mth in thr l- 



Mountains to Ari/ona and in t!i 

 ifornia. July-Aug. 



6. Woodsia obtusa (Spreng.) Torr. Blunt -lobed 



Poly podium obtusum Spreng. Anleit. 92. 1804. 

 Hypopeltis obtusa Torr. Comp. 380. 1824. 



Woodsia oblusa Torr. Cat. PI. in Geol. Rep. N. Y. 195. 

 1840. 



Rootstock short, creeping. Stipes not jointed, 

 pale green, ^ / -6 / long; leaves broadly lanceolate, 

 6 / -i5 / long, minutely glandular-pubescent, nearly 

 2-pinnate ; pinnae rather remote, triangular-ovate, 

 or oblong, piunately parted into obtuse oblong 

 crenate-dentate segments ; veins forked and bear- 

 ing the sori on or near the minutely toothed lobes ; 

 iudusium conspicuous, at first enclosing the spor- 

 anges, at length splitting into several jagged lobes, 

 which are much wider than those in any of the pre- 

 ceding species. 



On rocks, Nova Scotia (according to Macoun > and 

 M. line to northern New York, Wisconsin and British 

 Columbia, south to Georgia, Alabama, the Indian Ter- 

 ritory and Arizona. Ascends to 2200 ft. in Virginia. 



July-Aug. 



