192 DAVALLIA. 



" Hedtv. Flir [according to IVUld.) Trichoraanes aculeatum, 

 Sw. Prodr. p. 137. Acrostichum aculeatum, L. Davallia 

 dumosa, Poepp. Fil. Cub. (in Herb. Hook.) and Kze. Crypt. 

 Poepp. in Linncea, p. 88.* [not Sw.) 



Hab. West Indian Islands. Jamaica, Sloaiie, Swartz, Menzies, Wiles, 

 McFadyen ; Cuba, Poeppig. 



Subgenus IX. DareoidEjE. Sori lateral or sublateral, and 

 vwre or less oblique upon a more or less dilated terminal seg- 

 ment. Involucre always close to the margin, broader than long, 

 terminal upon a vein, somewhat cup-shaped, open only at the 

 truncated mouth and forming a compressed pouch at the edge 

 of the segment, of nearly the same texture as the frond. — Tro- 

 pical or subextratropical Ferns, of the Old and the Neiv World, 

 Root tufted, fibrous. Stipes linear, compressed , sometimes with 

 a few scattered scales. Fronds a span to a foot or more long, 

 at first pinnate then compoundly pinnatifid, or deeply divided 

 throughout in a bi-tri-pinnatifid ynanner, into narrow, linear 

 segments, only a little dilated at the apices, everywhere gla- 

 brous, opaque, the texture moderately firm (probably rather 

 fleshy when recent), single-veined, the vein sunk, obscure; 

 colour pale green. 



Obs. This is indeed a small though a very natural subgenus; in colour and 

 texture so much resembling the group Darea among Asplenia, that I have 

 derived the name of the subgenus from that circumstance : and the gene- 

 ral obliquity of the sorus, opening towards the margin, strengthens the 

 similarity. The resemblance is the greatest \\\\\\ Asplenium {Darea) Shut- 

 tleivorthianum, Kze., in Schkuhr's Stippl. t. 14. There however the invo- 

 lucres are more elongated and are more decidedly lateral. 



100. D. gibberosa, Sw. ; froud ovate bi-subtripinnate subco- 

 riaceous opaque, pinnae acuminate deeply bipinnatifid, seg- 

 ments rather distant linear dilated at the apex simple or 

 obliquely bifid gibbous on one side 1-veined, sorus on the 

 oblique dilated apex of a segment with generally a tooth of 

 the segment on the outside, involucre cup-shaped of nearly 

 the same colour and texture as the frond. — Sw. Syn. Fil. 

 p. 1^4. and 351. Schkh. Fil. p. 121, t. 128 (very accurate). 

 Willd. Sp. PL V. p. 476. Trichomanes, Forst. Prodr. 

 n. 470. Davallia glaucescens, " Hediv. FiW'' 



Hab. Pacific Islands, Banks, Nightingale. Otaheite, Beechey. Pitcairn's 

 Island, Cuming, n. 1.373. — The tallest of this group, and, in the lower 

 part at least, twice or thrice pinnated, then pinnatifid. Stipes and main 

 rachis less compressed than in most of the species and of a darker colour. 



* Presl quotes D. dumosa, Kze., and D. dumosa and D. fumarioides, 

 Poepp. PI. Exsicc, under D. aculeata, Sw. My specimen of D. dumosa, 

 from Poeppig, is unquestionably, as I have above stated, D. fumarioides. 



