The Fern Lover's Coiipaxiox 157 



KEY TO THE WOODS IAS 



Stipes not jointed: 



Iniinsium am|)le, segments I)road, froiul withont hairs. 



01)tuse Woodsia. 

 Pinme liispidulous, with white jointctl hairs beneath. 



Rocky ]\[ountain Woodsia. 

 Fronds bright green, pinna" ghibrous, oblong. 



Oregon Woodsia. 

 Fronds dull green, lanceolate, glandular beneath. 



Cathcart's Woodsia. 

 Stipes obscurely jointed near the base: 



Fronds more or less chaffy, i)inna' oblong to ovate, 

 crowded. Rusty Wootlsia. 



Fronds linear, smooth, pinn;e deltoid or orbicular. 



Smooth Woodsia. 



Fronds lanceolate, a few white scales beneath; pinn;e 



deltoid-o\'ate. Alpine Woodsia. 



The Woodsias 



Small, tufted, pinnately di^'ided ferns. Fruit-dots 

 borne on the back of simply forked, free ^■eins. Indusium 

 fixed beneath the sori, thin and often evanescent, either 

 small and open, or early bursting at the top into irregidar 

 pieces or lobes. (Named for James Woods, an English 

 botanist.) 



(1) RcsTY Woodsia. IVooJsia ilrensis 



Fronds oblong-lanceolate, three to ten inches high, 

 rather smooth above, thickly clothed underneath with 



