60. ACEOSTICUUM, *** POLTBOTRYA. 413 



scaly ; barren fr. simply pinnate, the st. 4-6 in. 1., naked, firm, erect, the^. 3-5 

 ft. L, 12-18 in. br. ; pmnw 6-12 in. 1., f-1 J in. br., the point acuminate, the edge 

 thickened and serrulate, the base short-stalked, with a gland on the upper side, 

 not articulated ; fertile fr. bipinnate, on a longer stem ; pinnce long-stalked, with 

 numerous distant pinnl. 2-3 in. 1., |-1 lin. br., spreading from the rachis at 

 right angles ; texture coriaceous ; rachis and both sides glossy ; veins fine and 

 close. — ^Lomaria, Desv. A. Sleyerianum, Hh. Sp. 5. p. 250. G. F. 1. 16. 



Hab. Mascaren Isles and NataL — Well diatiDguished from all the others by its com- 

 ponnd fertile piimae. 



*** Polybotrj'a, S. B. K. Barren frond not lomarioid in habit, variously/ 

 pinnatifid or pinnate, vnth the veins, except in the first species, pinnate in the 

 ultimate divisioTis of the barren frond. Fig. 60. c, d, e. Sp. 71-B3. 



71. A. (Polyb.) bifurcatum, Swz. ; St. densely tufted, 2-4 in. 1., slender, 

 stramineous, naked ; fr. 3-4 in. 1., |-f in. br., pinnat« ; lower pin-nw of 

 barren fr. usually 2- sometimes 3-eleft, with linear divisions, those of the barren 

 pinnse broader and not so deep ; texture herbaceous ; both sides naked ; a single 

 vein carried into each ult. division. — Hh. Sp. 5. p. 209. 27id Cent. t. 91. 

 Microstaphyla, Pretl. Adiantum furcatum, Linn., oldest name. 



Hab. St. Helena. 



/'2. A. (Polyb.) articulatum, Hk. ; St. firm, erect, nearly naked ; Jr. ample, 

 probably several feet long, bipinnate ; barren pinnee (in our specimens) 9 in. 1., 

 1^ in. br. ; pinnl. close, oblong, the point bluntish, tiie edge crenate, the upper 

 side distinctly auricled, and the lower obliquely truncate at the base ; texture 

 subcoriaceous ; rachis and both sides naked ; fertile pinnce 3-4 in. 1., stalked, 

 linear-cylindrical, anricled on the upper side at the base. — Hi. Sp. 6. p. 247. 



Hab. FbilippiDes, Cuming, 296. Is a TeralophyUum of Mettenios. 



73. A. (Polyb.) Wilkesianum, Hk . ; rhizome woody, wide-scandent, naked ; st. 

 6-9 in. 1., firm, erect, naked, stramineous ; fr. bipinnate, 1-2 ft. 1., 8-12 in. br., 

 upper pinnce of the barren fr. entire in one of our specimens, usually all cut 

 down to the rachis into numerous unequal-sided rhomboidal pinnl., which are 

 cnneate, especially below at the base, the rest of the edge deeply toothed ; texture 

 glossy, subcoriaceous ; rachis and both ddes naked ; fertile pinnl. stalked, linear- 

 cylindrical or oblong-subdimidiate. — Hi. Sp. 5. p. 247. 



Hab. Society Isles and New Caledonia. — This comes near the preceding, with 

 which Metteniiis nnites it. Both have the pitmse and pinnules distinctly jointed at the 

 base. 



74. A. (Polyh.) apiifoliam, Hk. ; caiid. stout, woody, erect ; st. of barren fr. 

 2-3 in. 1., erect, densely clothed with tomentum ; barren fr. 4-6 in. each way, 

 deltoid, tripinnate ; pinnce close, only the lowest pair with pinnatifid pinnl. ; 

 ult. divisions oblong-rhomboidal, |^-f in. 1., the base equally cuneate, the outer 

 edge slightly toothed ; texture herbaceous ; rachises tomentose ; fertile fr. on a 

 slender naked St. 6-8 in. 1., the fr. panicled with a few distant slender simple 

 or compound beaded branches.— J?*. Sp. o.p. 248. 



Hab. Philippines, Cuming, 26, Lobh. — This has altogether the habit of an Anemia, with 

 the fertile segments ball-like, with the sori all over the surface. 



75. A. (Poljh.) plumbicaule. Baker ; rhizome wooiy, wide-scandent, scaly ; St. 

 of barren fr. 9-10 in. L, firm, erect, glossy, naked ; barren fr. 1^-2 ft. ]., 

 nearly 1 ft. br., simply pinnate, with about 12 pinnce on each side below the 

 point, the lower ones sessile, 6-6 in. 1., 1 in. br., the point acuminate, the edge in 

 the upper part sharply toothed, the base broadly rounded on the upper, truncate 



