ASPLENIUM, § ATHYHIUM. 217 



Species that are venj dubious, probably either of the Darea 

 or Dareastrum group. 



Darea disticha, Klf. En. Fil. p. 180. Lonchitis bipinnata, 

 Forsk. FL Eg. Arab. jJ- 184. — Arabia Felix. 



Darea Pteridis, Bory, in Belong. Voy. p. 52. — Mauritius. 



Darea asplenioides, Bory, in Belang. Voy. p. 53, — Mau- 

 ritius. 



Darea obtusa, Desv. in Bert. Mag. v. p. 323. — Mauritius. 



Asplen. dubium, Brack. Fil. U. S. Expl. Eip. p. 172. — 

 Feejce Islands (sterile). 



Csenoptcris cuneata, Desv. Annul. Linn. Soc. vi. p. 267- 



Ctcnopteris auriculata, "Th. Nov. Act. Petrop. 1791, 9, t. 2. 

 /. 2."— Cape. 



Darea tlialictroides, Fee, Gen. p. 333. — Moore refers it 

 doubtfully to Aspl. tJialictroides, Kze. in Linncca, xxiii. p. 

 238, and suspects it may be Aspl. cicutarium. — Jamaica. 



C. Athyrium. Sori general!)/ short ; involucres lax, convex, straight or often 

 more or less arcuate and even hippocrepiform, sometimes with the lobes 

 unequal. Fronds pinnato-piniMtifid or bi-tripinnate. — Qen. Athyrium,* Roth. 

 Allantodire, Sp. Auct. 



215. A. (Atbyrium) FiJix-fcemina, 'Qerwh.-, caudex ascending 

 paleaceous with broad ferruginous scales, stipites tufted a span 

 to a foot and more long stramineous-brown, fronds 1 i-3 feet 

 long oblong rather suddenly acuminate submembranaceous 

 bi- rarely tri-pinnate, primary pinnae numerous patent from a 

 moderately broad nearly sessile base oblong-lanceolate acu- 

 minate 4-6 inches long, pinnules numerous approximate hori- 

 zontally patent sessile ^-J inch long oblong rather obtuse, 

 lower ones deeply pinnatifid the segments ovate with 2 or 

 3 strong and sharp serratures, superior ones more entire 

 coarsely serrated uppermost ones confluent into a pinnatifid 

 or serrated acumen, sori copious one to each segment of 

 the pinnule near the rachis oblong, involucre very convex 



* The genus Athyrium was formed by Roth, to include Aspidium fontannm, 

 Sw., and Asplenium Fili.c-fwmina, Bernh. Brown says of these, " Ad As/tleninm 

 certe referendum A. fontannm, et vix ob invohicrum basi arcuatuni se])arari 

 detjet A. Fllix-faemina aliitque species hactenus inedita)." Those who maintain 

 the genus are by no means agreed as to the species that should be included 

 in it. 



VOL. III. 2 F 



