416 GO. ACEOSTICHUM, * ACONIOPTEEIS AKD OLFERSIA, ** STENOSEMIA. 



entire or cleft, the outer edge crenate or dentate ; texture subcoriaceous ; fertile 

 fr. I in. br., orbicular.— i^. Sp. S.p. 252. Ic. t. 96.— j3, A. tripartitum, TLW. ; 

 barren fr. 2-3 times dichotomously forked, with cuneate or ligulate ult. divisions. 

 —Rk. S Gr. t. 118. 



Hab. New Granada to Peru. 



86. A. (Rhip.) peltatum, Sw. ; rhizome slender, wide-creeping ; st. distant, 

 slender, 1-3 in. 1., scaly throughout ; b(wren fr. 1-2 in. each way, repeatedly 

 dichotomously forked, with narrow linear ultimate divisions J-J lin. br. ; texture 

 subcoriaceous ; fertile fr. J in, br., often 2-lobed. — Hh. Sp. 5. p. 252. 



Hab, Mexico and West Indies to Peru and Brazil. 



87. A. (Rhip.) fceniculaceum, Hk. ; rhizome slender, wide-creeping ; st. distant, 

 slender, 2-8 in. 1., scaly throughout ; sterile fr. 1-2 in. br., very often dichoto- 

 mously forked, with filiform ultimate divisions ; texture subcoriaceous ;/ert&/r. , 

 f in. br., 2-lobed.— fl*. Sp.. 5. p. 263. Hk Sf Gr. 1. 119. 



Hab. Andes of Bcuador, Jameson, Spruce. 



§§ Veins anastomosing. Sp. 88-132. 



* Veins united onh/ near the margin. Sp. 88-90. 



+ Fronds simple. Aconiopteris, Presl. Sp. 88-89. Fig. 60. p. 9» 



88. A. (Aeon.) subdiaphanum, Hk. & Gr. ; caud. woody, erect ; st. tufted, 2-6 

 in. I., firm, erect, scaly ; barren fr. 4-8 in. 1., 1-1^ in. br., both ends narrowed, 

 the edge entire ; texture subcoriaceous ; veins beneath very prominent, united by 

 a zigzag veinlet just within the edge ; fertile fr. much narrower, on a longer 

 stem.— if*. ;S;p. 6. p. 266. Hk. & Gr. t. 106. 



Hab. St. Helena. The oldest name is A. nervosum, Bory. 



89. A. (Aeon.) gorgoneum, Kaulf. ; st. tufted, firm, erect, 1-2 in. 1., passing 

 gradually into the barren fr., which is 6-16 in. 1., 2-3 in. br., the point acute, 

 the lower two-thirds narrowed very gradually, the edge entire ; texture sub- 

 coriaceous ; surfaces naked ; veins united by a straight veinlet just within the 

 margin ; fertile fr. smaller, narrower, on a st. 6 in. or more 1. — Hk. Sp. 5, 

 p. 264. 



Hab. Sandwich and Society Isles. — Habit of A. latifoliv/m. 



tt Fronds pinnate. Olfersia, Eaddi. Sp. 90. Fig. 60. m, n, o. 



90. A. (Olf.) cervinum, Sw. ; rhizome woody, creeping, densely clothed with 

 long linear scales ; st. 1 ft. or more 1., scaly downwards ; barren fr. 2-4 ft. 1., 

 simply pinnate ; pinnae 4-9 in. 1., 1-2 in. br., entire or nearly so, unequal at the 

 base ; textwre coriaceous, naked 4 veins prominent, united just within the edge 

 by a straight veinlet ; fertile pinnce distant, linear-lanceolate, bipinnate, with 

 short spreading subcylindrical pinnl. — Hk. S Gr. t. 81. Fil. Ex. t. 43. — /3, O. 

 cm-covadensis, Raddi ; fertile fr. simply pinnate only, the pinnse unbranched, 

 —Hk. Sp. 5. p. 25^ 



Hab. Cuba and Mexico to South Brazil and Peru. — The extremes look very different, 

 but are connected by intermediates. There is a form with the barren pinnae deeply 

 pectinato-pinnatifid. 



** Stenosemia, Presl. Veins forming one or two rows of areolce against the 

 midribs, the rest free. Sp. 91. Fig. 60, r, s, 



91. A. (Steno.) auritum, Sw. ; caud, erecty woody ; sterile fr. with a st. 6-9 

 in, ],, deltoid, 8-12 in, each way, ternate, the central segm. deeply pinnatifid, 



