POLYPODIACE^. 117 



bipinnate in the lower third ; pinnae closely placed, ovate, 

 rounded at the ends, made up of 8 — 10 oval pinnules or divi- 

 sions besides the terminal one, obtuse, not armed ; sori one or 

 two to each pinnule. (Aspzdium mohroides and Dryopteris 

 moroiides of previous editions, not A. mohroioides Bory, an 

 allied but very distinct plant of the Southern Hemisphere.) 

 Near Mt. Shasta, California (Lemmon). 



* * * * Fronds farge, fully bipinnate. 



7. P. aculeatum (Swz.) Roth. Stipes 6' — 8' long, densely 

 scaly at base; lamina 18' — 24' long, 6' — 10' wide, bipinnate; 

 pinnules sharply serrate, incised, or the lowest pinnatifid, the 

 upper basal serration or lobe more pronounced like a small 

 auricle, all ending in an acuminate bristle-tip ; under surface 

 pilose with slender hairs. California. 



8. P. Braunii (Spenner) Lawson. Stipes growing in a crown, 

 densely chaffy; fronds lanceolate, 12' — 18' long,. with numerous 

 horizontal oblong-lanceolate pinnEe, the lower gradually reduced 

 in size and obtuse ; pinnules ovate or oblong, truncate and 

 almost rectangular at the base, sharply toothed, beset with long, 

 soft, and chaffy hairs ; rachis with light brown chaff. {Aspidium 

 Brau7iii Spenner.) Maine to New York and northward. 



XXV. PHANEROPHLEBIA Presl. 



Sori round, borne on the back of forking veins. Indusium 

 flat or flattish peltate, opening all round the margin. Veins 

 several times forking, often united to form areolae. Name from 

 Greek <pavep6i, distinct, and (pXe^oi, a vein. Eight species 

 are known from tropical America. 



I. P- auriculata Underw. Rootstock short, creeping, 

 densely covered with the bases of the persistent stipes ; stipes 

 stramineous, 4' — 7' long, with abundant dark-brown lanceolate 

 scales which become narrower above and almost hair-like ; 

 pinnse 10 — 16, the terminal about like the lateral, 2' — 3' long, i' 

 or less wide ; lateral pinnse unequal at base, the lower angle 

 obliquely truncate, the upper usually developed into a well- 

 marked auricle ; margins strongly serrate or sometimes more 

 deeply incised, the teeth ending in sharp prickles projecting 



