60. ACROSTIC1IUM, *** POLYBOT11YA. 413 



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

 ft. 1., 12-18 in. br. ; pinnae 6-12 in. ]., f-1^ 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 ; pinnae 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. Meyerianum, Hk. Sp. 5. p. 250. G. F. t. 16. 



Hah. Mascaren Isles and Natal. Well distinguished from all the others by its com- 

 pound fertile pinnae. 



** Polybotrya, H. JB. K. Barren frond not lomarioid in habit, variously 

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

 ultimate divisions of the barren frond. Fig. 60. c, d, e. Sp. 71-83. 



71. A. (Polyb.) bifurcation, S\vz. ; st. densely tufted, 2-4 in. 1., slender, 

 stramineous, naked ; fr. 3-4 in. 1., ^-| in. br., pinnate ; lower pinnce of 

 barren fr. usually 2- sometimes 3-cleft, 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. Hk. Sp. 5. p. 209. 2nd Cent. t. 91. 

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



Hab. St. Helena. 



72. A. (Polyb.) articulatum, Hk. ; st. firm, erect, nearly naked ; fr. ample, 

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

 1^ in. br. ; pinnl. close, oblong, the point bluntish, the 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, auricled on the upper side at the base. Hk, Sp. 5. p. 247. 



Hab. Philippines, Cuming, 296. Is a Teratophyllum of Mettenius. 



73. A. (Polyb.) Wilkesianum, Hk. ; rhizome woody, vvide-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 

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

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

 cylindrical or oblong-subdimidiate. Ilk. Sp. 5. p. 247. 



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

 which Mettenius unites it. Both have the pinnse and pinnules distinctly jointed at the 

 base. 



74. A. (Polyb.) apiifolium, Hk. ; caud. 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, J- 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. Hk. Sp. 5. p. 248. 



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

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



75. A. (Polyb.) plumbicaule, Baker ; rhizome woody, wide-scandent, scaly ; st. 

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

 nearly 1 ft. br., simply pinnate, with about ' 1 2 pinnce on each side below the 

 point, the lower ones sessile, 5-6 in. 1., 1 in. br., the point acuminate, the edge in 

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



