~J 



41 G CO. ACROSTICHUM, * ACONIOPTERIS AND OLFERSIA, ** STENOSEMIA. 



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

 fr. J in. In-., orbicular.— iZ/t.^/S)?. 5. p. 252. Ic. t. 90.-/3, A. tripartitim, B.k. ; 

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

 ~Bk. d- Gr. «. 118. 



Hab. New Granada to Peru. 



80. A. (Rhip.) peltatum, Sw. ; rhizome slender, wide-creeping ; St. distant, 

 slender, 1-3 in. 1., scaly throughout ; barren fr. 1-2 in. each way, repeatedly 

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

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



Hab. Mexico and West Indies to Peru and Brazil, 



87. A. (Rhip.) fceniculaceum, Hk. ; rhhome 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 ;/er^27c/r. 

 I in. br., 2-\ohed.—HL Sjj. 5. p. 253. HL S; Gr. t. 119. 



Hab, Andes of Ecuador, Jameson, Spruce. 



§§ Veins anastomosing. Sp. 88-132. 



* Veins united only near the margin. Sp. 88-90. 



t Fronds simple. Aconiopteris, Prcsl. Sp, 88-89. Fig. GO. p. 9. 



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

 in. ]., firm, erect, scaly ; barren fr. 4-8 in. 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.— i?/t. Sp. 5. p. 250. Hk. & Gr. t. 105. 



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 G-15 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. 254. 



Hab. Sandwich and Society Isles. — Habit of A. latifolium. 



+t Fronds pinnate. Olfersia, Raddi. Sp. 90. Fig. GO. m, n, o. 



90. A. (Olf.) ccrvinum, Sw. ; rJdzom'e woody, creeping, densely clothed with 

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

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

 base ; texture coriaceous, naked ; veins promicent, united just within the edge 

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

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

 corcovadensis, Raddi ; fertile fr. simply pinnate only, the pinnse unbranched. 

 —Hk. Sp. 5. p. 254. 



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 areolae against the 

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



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

 in. 1., deltoid, 8-12 in, each way, ternate, the central segm. deeply pinnatifid, 



