POL YFODIA CE^. 9 S 



stout, covered with pale-brown tomentura; fronds 8' — 15' long, 

 oblong-lanceolate, everywhere but especially beneath toraentose 

 with slender, brow^nish-white, obscurely articulated hairs, tri- 

 pinnate; pinnae and pinnules ovate-oblong ; ultimate pinnules 

 V— f" long, the terminal ones twice as large; indusium pale, 

 membranous, continuous. {C. Bradburii Hook.) Virginia to 

 Missouri, Texas, and Arizona. 



XX Stipe and rachises covered with very narrow scales. 

 H- C. Eatoni Baker. Differs from the last in having the 

 stipes and rachises covered with very narrow scales and by the 

 matted tomentum of the upper surface. Arizona. 



IS- C. f ibrlllosa Dav. Plant 3'— 6' high ; rootstock forming 

 dense, entangled clumps of short rhizomes, clothed with dark 

 linear-lanceolate scales, passing gradually into lighter-brown 

 scales, mixed with coarse fibres and tomentum at the base of 

 ■ the stipes; stipes 2' — 3' long, chestnut-brown, terete, at first 

 tomentose with fibrous scales and wool, becoming smooth with 

 age ; fronds 2' — 3' long, f ' — i^' wide, tripinnate, loosely covered 

 with deciduous tomentum, that along the rachises beneath per- 

 sistent, tawny, mixed with coarse fibres. (C. lanuginosa, var. 

 fibrillosa Dav.) San Jacinto Mountains, California {Parish). 



16. C. Parishii Dav. Rootstock creeping, short, clothed 

 with deep-brown linear-lanceolate scales, with darker nearly 

 black raid-nerves ; stipes 2' — 3' long, approximate, light to dark- 

 brown, clothed at base with scales similar to those on the root- 

 stock, passing gradually into broader pale-brown or nearly white 

 nerveless scales, with more or less deciduous, slender, pale scales 

 and chaflf above; fronds 3' — 4' long, i' — ij' broad, oblong- 

 lanceolate, tri — quadripinnate, with both surfaces scantily 

 clothed with a coarse tomentum ; pinnae alternate, oblong-ovate, 

 obtuse, the lowermost somewhat distant; segments roundish, 

 the terminal ones largest and three-lobed ; indusia very narrow, 

 only partially enclosing the sori. San Diego Co., California 

 {Parish). 



** Fronds covered beneath with imbricated scales, not tomentose. 



17. C. Fendleri Hook. Stipes 2' — 5' long, chaffy with 

 minute slender scales ; fronds 3' — 4' long, ovate-lanceolate, 

 tripinnate; scales of primary rachis like those of stipe, those of 



