POLYPODIUM, § PIIEGOPTERIS. 269 



apices, secondary piniife sessile opposite or alternate distant 

 but in the younger pinnoc often united by] a narrow wing, 

 from a broad truncated base oblong acuminate deeply nearly 

 to the costules (which are smooth hairy beneath) pinnatifid 

 with oblong subfalcate gradually tapering but ol)tuse entire 

 opposite or alternate segments entire at the margins which 

 are a little refiexed, the sinuses very acute, veinlets rather 

 distant pellucid once or twice forked, sori on the superior 

 branch of the veinlet forming two series nearer the margin 

 than the costule. — Gaudich. in Freyc. Voy. But. p. 362. t. 7 

 {very good). Brack. Fil. U.S.Expl. Exp. p. 15. Phegopteris, 

 Metten. Fhegopt. p. 29. — Var. /Q, tripinnate, segments and 

 ultimate pinnules an inch long acuminate dentato-pinnatifid. 



Hab. Sandwich Islands, Gaud'ichaud, Brackenridge, Dr. Diell, Ilillebrand. — 

 /3, Ilillebrand. — A very remarkable s])ecies, with a pteroid habit ; perhaps in this 

 respect more allied to P. pteroideum than to any other Fern. Brackenridge esti- 

 mates the length of the fronds at 12-15feet : "they aresnstainedin a more orless 

 erect position by the reflected points of the pinna?, which bend over and around 

 the branches of neighbouring plants. These fronds also continue to grow at the 

 points, while at the same time, for a distance of 2-3 feet and upwards from the 

 ground, they are fully developed and bear ripe sori." My var. ^ is certainly tri- 

 pinnate, and the ultimate segments or pinnules are dentato-pinnatifid, like the 

 segments in the following species, /*. ^rocfrww ; but they are more acuminate, 

 and the frond is glabrous. Some of the specimens, or, rather, portion of a 

 specimen, of this, have also secondary pinnae quite like those of P. Keraudre- 

 nianum. 



218. P. (Phegopteris) jjrocerum, 'Brsick. ; "caudex creep- 

 ing, fronds 6-8 feet long elongated erect bipinnate, pinnae 

 opposite sessile horizontal linear-attenuate pinnated at the 

 base pinnatifid towards the apex, pinnules subalternate ob- 

 long obtuse crenate, general rachis glabrous, j^artial with the 

 costcB and veins beneath pubescent setose on the upper side, 

 veins dichotomous, sori small distant solitary, capsules echi- 

 nate.'' Brack. Fil. U. S. Expl. Exp. p. 14. t.'s {excellent). 



Hab. Sandwich Islands, in the thickets and low trees, Brackenridge, Ilillebrand. 

 ■ — Brackenridge remarks that, "in hai)it, this bears a strong resemblance to the 

 P. Kei-atidrenianurn, Gaud, (our previous species), but is very distinct in the 

 form and size of the divisions." It is true that the form represented by Brack- 

 renidge does look very distinct from the P. Kerandreniannm, as figured by 

 Gaudicbaud; but in my remarks on the latter species I have had occasion to 

 notice a state which indicates a passage from the one to tlie otiier, and further 

 observations will, I think, prove tlie two to be identical. 



219. P. (Phegopteris) Berteroatium, Hook, not Spr. ; cau- 

 dex ?, stipes ?, rachis stramineous brown setoso-palcaceous, 

 baseof theseta2 tuberculate, frond 1^-2 feet and probably more 

 long 8-18 inches wide coriaceo-nicmbranaccous more or less 



