ATHYRIUM. 219 



liiis enumerated 18 (lifterent specific iianics, and lias tlionglit (it to record and 

 name and define 31 varieties! Of tliese tlie var. latiful'aun is the most distinct- 

 looking, as found at Keswick by Miss Wright, with the pinnules oval and broad 

 subpetiolated and ratiier serrated than pinnatifid, the rachises of the i)innic 

 winged. I do not find any of the N. American forms to differ essentially from 

 the European. 1 may be wrong in referring the A. lenuifronx of Wallich to this 

 species, but I can see no essential difference, unless it be in the presence of 

 spiculsc on the rachis, such as are found in some species of P/eris, but I do not 

 think they are constant through all the individual species either in the one genus 

 or the other. I cannot agree with Moore in making Blume's A. niyi-ipes a var. 

 of A. lemufrom, add to which Blume's plant has been long published ; Dr. Wal- 

 lich's only by name, as far as I know, but, indeed, the two, as seen in my her- 

 barium, are quite ditferent. 



216. A. (Athyrium) arcuatum, Mett. ; " stipes 6 inches 

 long, frond subcoriaceous dark green 2 feet long lanceolate 

 bipinnato-pinnatifid, ])innic alternate adscendenti-i)atulous 

 7-9 inches long 2-2^ inches broad elongato-lanceolate, pin- 

 nules divergent sessile alternate 1-1 4 hich long 4 lines wide 

 elongato-lanceolate broad-cuneate at the base rather ol)tuse 

 at the apex deeply pinnatifid, segments subfalcato-ovate 

 sharply crenate sinuses rather broad, costa canaliculate on 

 the upper side prominulous at the back, veins ])innate, sori 

 lunate near the costa, universal rachis flexuose channelled 

 above convex beneath, partial rachises arcuato-ascending mar- 

 gined, here and there squamulose." — Athyrium, Liebm. Fil. 

 Mex. p. 126. Moore. 



Ilab. Mexico, Liebmann. — Probably a large form of Aspl. FilLr-fcemina. 



217. A. (Athyrium) Martensii, Kze. ; "rhizome?, stipes 

 stramineous 1 foot long, fronds rigid-membranaceous above 

 dark beneath pale-green 1^ foot long below clothed with a few 

 scales lanceolato-oblong acuminate bi])innate, primary seg- 

 ments lax shortly petiolate 7 2 inches long obliquely patent 

 curved or falcate upwards lanceolate a little attenuated at 

 the base acuminated and lengthened at the apex and sliarply 

 serrate, pinnules rectangular-patent at the base ol)liquely 

 truncate and adnate ovato-lanceolate deeply pinnato-i)artite 

 at the apex obtuse inciso-serratc, segments on each side 5-9 

 oblong acutely inciso-serrate inciso-dcntate at the subtrun- 

 cated apex, costule pinnated the veins undivided, sori 1-2 at 

 the base of the inferior lacinite solitary at the base of the 

 superior laciniae hamate, involucre rigidly membranaceous 

 fornicate waved at the margin." Mett. — K::e. in SiUihi. 

 Journ. vi. 1848, ;;. 86 {name only). Metten. Asplen. p. 200. 

 Athyrium, Moore. Aspl. Michauxii, Mart, et Gal. Fil. Mex. 

 p. 126. Athyrium Galeottii, Fee, Gen. Fil. p. 187- 



