70 16. HYMENOPHYLLUM. 



dentate entire or forked linear scgm. ; sori few in number, not more than 4 to a 

 pinna, and usually confined to the segments of the upper side, sessile or slightly 

 stalked, a line each way ; valves divided more than two-thirds of the way down, 

 roundish or oblong, spinuloso-dentate or entire. Hk. Sp. 1. p. 100. Ic. Fil. 

 t. 963. H. spinulosum, H. B. K. Hk. Sp. 1. p. 100. H. pedicellatum, Kunze. 

 H. blepharodes, Pr. H. cristatum, Hk. & Gr. Ic. FiL 148. H. Peruvianum, 

 Hk. $ Gr. t. 208. 



Hab. Common in Tropical America, from Cuba and Mexico southward to Brazil, 

 ascending in the Andes to 9,000 ft. The six plants quoted as synonyms are considered 

 as distinct by Van den Bosch. H. torquescens and aculeatum, V. D. B., must probably 

 be placed here also ; but I have not seen specimens. 



65. H. Magellanicum, Willd. ; St. erect, wiry, rigid, 2-4 in. 1., naked or margined 

 with an undulato-crispate wing on each side \fr. oblong triangular, 3-6 in. 1., 2-3 

 in. br., tripinnatifid ; rachis winged throughout ; lower pinnce broadly triangular, 

 with pinnatifid pinnl., furnished with several linear spinuloso-dentate segm. on 

 each side ; sori 6 to 10, small, terminal on the segments of the upper pinnce ; 

 invol. oblong, with 2 short toothed valves. H. attenuatum, Hk. tip. 1. p. 99. 

 t. 36. B. L. Magellanicum, V. D. B. H. Bibraianum, Sturm, in Flora 3853, 

 p. 361. 



Hab. Chili, Chiloe, and Organ Mountains. Rachis and stipe with an undulato-crispate 

 wing, but the frond plane. 



66. H. Bridgesii, Hk. ; st. 2-6 in. L, wiry, naked or tomentose ; fr. broadly 

 ovafc-triangnlar, tripinnate, 4-6 in. L, 2-3 in. br. below ; main rachis only very 

 slightly winged near the apex ; pinnce oblong- triangular, with the pinnl. of the 

 lower ones pinnate quite to the rachis ; ult. segm. very narrowly linear, rigid, 1-2 

 lin. 1., erecto-patent ; sori minute, often 6 to 8 to a pinna, placed 1 or 2 at the 

 base of the pinnules ; invol. divided about two-thirds of the way down, oblong, 

 entire or very slightly toothed. Hk. Sp. Fil. 1. p. 97. t. 35. C. 



Hab. Cbili and Chiloe. The only species of this section that is fully tripinnate. 

 ** Frond crisped. Sp. 67-71. 



67. H. tortuosum, Hk. & Gr. ; st. 2-3 in. ]., erect, wiry, furnished with a narrow 

 crisped sinuated wing on both sides ; fr. broadly ovate-triangular, tripinnatifid, 

 3-6 in. 1., 2-3 in. br. below ; main rachis winged throughout ; lowest pinnce broadly 

 rhomboidal-triangular ; the segm. more or less crisped ; the ult. divisions 2-3 lin. 1., 

 linear, irregularly toothed and undulated at the margin ; sori sometimes 10 to 20 

 to a pinna, terminal on the ultimate segments, sessile ; invol. broadly ovate, 

 divided about halfway down ; valves spinulose on the outer edge. Hk. Sp, 1. 

 p. 99. Hk. & Gr. Ic. Fil. 1. 129. 



Hab. Chili, Patagonia, and neighbouring islands. L. seselifoliutn and L. dentatum, 

 placed by Van den Bosch near H. tortuosum, I have not seen. 



68. H. dichotomum, Cav. ; st. 2-3 in. L, naked or slightly margined with an 

 undulato-crispate wing on both sides ; fr. ovate-triangular, hi- or tripinnatifid, 

 4-6 in. L, 2-3 in. br. ; main rachis winged like the stipe throughout ; lower pinnce 

 three times as long as broad ; the segm. crisped, broadly linear, undulato-dentate 

 at the margin ; sori numerous, placed in the axils of the segments ; invol. small, 

 ovate ; valves spinose on the back, divided about halfway down, nearly entire at 

 the apex. Hk. Sp. Fil. I. p. 98. t. 36. A. 



Hab. S. Chili and Juan Fernandez. A closely allied plant grows in Peru (Lechler, 

 2563) with robust fronds 10 in. L, a tomentose rachis, and the lower pinnae with deeply 



