84 OUR NATIVE FERNS AND THEIR ALLIES. 



9. P. aureum L. Rootstock stout, densely seal}'; stipes 

 1° — 2° long, castaneous, naked ; fronds 3° — 5° long, 9' — 18' broad, 

 cut nearly to the rachis into broad entire or slightly undulate 

 pinnae ; areolae copious. Florida. 



§4. Campyloneuron Presl. Primary veins disti7ict from 

 midrib to the edge, connected by parallel transverse veinlcts ; 

 areolcE similar, containing two or more sori. 



10. P. phyllitidis L. Rootstock stout, scaly; stipes short 

 or none; fronds simple, 1° — 3° long, i' — 4' broad, the ^JoinL 

 acute, lower part gradually narrowed ; texture rigid, coriaceous ; 

 areolae in rows of 6 — 12 from midrib to edge. Florida. 



§ 5. Phymatodes Presl. Areola: fine, copious, irregular, the 

 free veinlets spreading in various directions ; sori various in posi- 

 tioti. 



11. P. Swartzii Baker. Rootstock wide creeping, slender, 

 covered with linear ferruginous scales ; stipes \' — i' long, slender, 

 naked; frond simple, 2' — 4' long, ^' — |' broad, narrowed gradu- 

 ally toward both ends, the edge entire, undulate, or slightly 

 lobed ; sori uniserial on free veinlets. (P. serpens Swz.) Key 

 Largo, Florida {Curtiss). 



III. GYMNOGRAMME Desv. 



Sori oblong or linear, following the course of the veinlets and 

 like them, simple, forked, pinnate, or variously anastomosing, 

 without indusia. Name from Gr. yv/nvoi, naked, and ypd/it/ia, 

 line. Includes about 100 species, mostly tropical. 



§ I. EuGYMNOGRAMME. Veins free, under surface 7iot fari- 

 nose. 



1. G. Ehrenbergiana Klotzsch. Rootstock creeping ; stipes 

 grayish, puberulent, 3' — 6' long; fronds 5-angled. i' — 3' each 

 way, hispid above, tomentose beneath, pinnate ; lower pinnae 

 much the largest, unequally triangular, pinnate; upper pinnje 

 lobed or crenate. {G.pedata of check-lists not of Kaulf., G. podo- 

 phylla Hook, in part, G. hispida Mett. and former edition.) 

 Texas to Arizona. 



? 2. CeR(1PTERIS Link. Fronds farinose below. 



2. G. triangularis Kaulf. (G(3LD-PERN, Golden-hack.) 

 Stipes densely tufted, slender, blackish-brown, polished, 6' — 12' 

 long; fronds 2' — 5' each way, deltoid, pinnate; lower pinnae 



