84 OU'R NATIVE FERNS AND THEIR ALLIES. 



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

 i 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 distinct from 

 midrib to the edge, connected by parallel transverse veinlets ; 

 areolcE similar, containing two or more sori. 



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

 or none; fronds simple, i 3 long, i' 4' broad, the poini 

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

 areolse in rows of 6 12 from midrib to edge. Florida. 



5. PHYMATODES Presl. Areolcefine, copious, irregular, the 

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

 tion. 



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

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

 naked; frond simple, 2' 4' long, V |' 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. yvfj.vo$, naked, and ypd/ujua, 

 line. Includes about 100 species, mostly tropical. 



i. EUGYMNOGRAMME. Veins free, under surface not 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 pinnae 

 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. CEROPTERIS Link. Fronds farinose below. 



2. G. triangularis Kaulf. (GOLD-FERN, GOLDEN-BACK.) 

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

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



