Polypodium. 69 



4. P. pectinatum, L. Stipes rigid 2'— 6' long; fronds ellipti- 

 cal-lanceolate, i°— 2|° long, 2' — 6' broad, cut to the rachis into 

 horizontal, entire or toothed pinnae, the lower ones much reduced ; 

 rachis naked or finely villose ; veinlets pellucid, once or twice 

 forked ; sori in long rows, of medium size. Fla. VI. 



\ 2. .GONIOPHLEBIUM, Blume. Veins forming ample reg- 

 ular areolcE, ( almost imperceptible in No. 5) each zvitk a single dis- 

 tinctfree included veinlet, bearing a sorus at its tertninus. 

 * Under surface sguatnous. 



5. P. incanum, Swz. Stipes i' — 4' long, erect, densely scaly ; 

 fronds 2' — 6' long, 1' — 15' broad, cut to the rachis into entire 

 pinnae ; texture coriaceous ; sori small ; veins indistinct, united or 

 frequently free. Va. to 111., and southward. VI. 



** Under surface mostly smooth. 



6. P. Californicum*, Kaulf Rhizoma creeping, chaffy ; stipes 

 3' — 6' long, stramineous when dry, naked; fronds ovate to oblong- 

 lanceolate, 6' — 9' long, 3' — 5' broad, cut nearly or quite to midrib 

 into finely-toothed pinnae ; texture papyraceo-herbaceous ; sori 

 large ; veinlets 4 — 6 to each vein. (Including P. intermedium, 

 H. & A.) Cal. IV. 



7. P. Scouleri,* H. & G. Rhizoma stout, creeping, scaly; 

 stipes 1' — 4' long, erect, naked ; fronds thick 3' — 12' long, 1' — 6' 

 broad, cut down to rachis into from 5 — 29 close, blunt pinnae ; tex- 

 ture coriaceous, fleshy when recent ; sori very large ; veinlets reg- 

 ularly anastomosing forming a single series of large areolae. Cal. 

 and northward. IV. 



\ 3. PHLEBODtUM, R. Br. Veins form.ing ample areolce, 

 each with two or more distinct free included veinlets bearing sori 

 on their united points. 



8. P. aureum, L. Rhizoma stout, densely scaly ; 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 ; 

 areolcB copious. Fla. VI. 



? 4. CAMPYLONEURON, Presl. Primary veins distinct from 

 rnidrib to the edge, connected by parallel transverse veinlets, areolce 

 similar, containing two or more sori. 



9. P. Phyllitidis, L. Rhizoma stout, scaly ; stipes short or 

 none; fronds simple 1° — 3° long, \' — 4' broad, the point acute, 

 lower part gradually narrowed ; texture rigid, coriaceous ; areolae 

 in rows of 6 — 12 from midrib to edge. Fla. VI. 



—11 



