LOXSOMA. 85 



within the involucre, stipitalc, with an incomplete elastic rinf]. 

 — Tropical Foms of the northern hemisphere, the Sandwich 

 Islands and Peru, ample, bipinnate. Fronds ■subcoriaceoit.s or 

 viemhranaceous. Veins pinnated^ veudets simple or forked. 

 Hook, Gen, Fil. tab. 44, B. 



1. T). protifera, Hook,; fronds ample bi?-pinnate membra- 

 naceous glabrous, pinnie opposite elongated oblong acuminate 

 deeply ])innati(id nearly to the costa, the segments distant 

 oblong obtuse nearly entire (wlien barren), involucres on short 

 lirojecting teeth small jjateriform inserted on both sides tlie 

 segments and towards the apex, veins all simple. D. Macraei, 

 Hook, et Grev. Jc. Fil. t. 154. Dicksonia, Kaulf. En. Fil. 

 p. 2-25. 



Hab. Oahu, Chamisso, Lay and Collie in Beechey's Voyage, arclay. 

 Owbyhee, Macrae. — Kaulfiiss, who first described tins handsome plant, ob- 

 serves that its rachis is proliferous, whieh is not apparent in my specimens. 



2. D. Matliewsii, Hook.; fronds auiple glabrous bipinnate 

 coriaceo-membranaceous, jiinnaa alternate or o])positc oidy at 

 the base of the primary divisions oblong from a broad base 

 gradually acuminated deeply pinnatifid to the costa or in the 

 lower ones pinnato-decurrent, segments and ultimate pin- 

 nules approximate oblicpiely broad-ovate very obtuse or ab- 

 rupt the larger ones lobed and bluntly auricled at the base 

 above irregularly crenate, involucres from the apices of the 

 segments approximate cup-shaped compressed situated on 

 short teeth, veins approximate sim])le and forked. (Tab. 

 XXX. B.) 



Hab. Peru, Mathews, n. 1782. — Widely different from the preceding, 

 yet, in my mind, confirming the validity of the genus, which I distinguish 

 by having a cup-shaped or pateriform membranaceons involucre, standing 

 forward beyond the margins of the segments upon little teeth, never direct- 

 ed downward or towards the underside. Its nearest affinity is with Loxso- 

 ma and Trichomanes. The capsules, however, are dilfeient from botli, of 

 the ordinary structure, but situated ou very long stalks. 



10, LoxsoMA, Br. 

 Sori marginal, pointing forAvard, but partially sunk in the 

 axil of a tooth or lobe, from the apex of a vein. Inrolucres 

 suburceolate, coriaceous, the outer apparently formed of u 

 changed i)ortion of the frond, the mouth triuicated, entire, 

 Beceptacle columnar, elongated, much exserted beyond the 

 involucre, and covered, for its whole length, with clavate 

 shortly stipitate capsnles, mixed with jointed hairs and fur- 

 nished with a broad oblique complete ri)iy, o])ening on one 

 (the out-) side vertically, Spurnlcs triangular, with a de- 

 pressed triangular mark, — A Leant i/ul Fern o/New Zealand. 



