16. HYMENOPHYLLUM. 69 



a slight wing to the rachis on the lower, but deeply pinnatifid on the upper side, 

 with long-, narrow, parallel, simple or slightly forked linear spinuloso-dentate 

 segm. ; sori often 6 to 8 to a pinna, terminal on the lower segments of the upper 

 side ; invol. divided nearly to the base with ovate entire valves. Hk. 8p. 1. p. 96. 

 t. 34. D. 



Hab. Chili and Chiloe. A beautiful species, easily recognized by its peculiar pectinate 

 pinnse. 



60. H. muUifidum, Swartz ; st. 2-4 in. 1., wiry, naked ; fr. broadly ovato-lan- 

 ceolate, tripinnatifid, 2-6 in. 1., 1-5 in. br. ; main rachis winged above, wingless 



on both sides ; invol. obovate, tubular below ; valves divided not more than half- 

 way down, entire ; recept. sometimes exserted. Hk. Sp. I. p. 98. Hk. & Gr. Ic. 

 Fil. t. 167. H. Feejeense, Brack, t. 37. f. 2. 



Hab. New Zealand, and islands of the Pacific. An elegant plant in the larger forms. 

 In exposed situations the fronds are much drawn together, and the segments are 

 recurved. 



61. H. triangulare, Baker ; st. 2-4 in. 1., smooth, naked ; fr. ovate-triangular, 

 tripinnatifid, 4-6 in. 1., 2-3 in. br. at the base ; main rachis winged above ; the 

 second, rachis broadly winged throughout ; pinnae rhomboidal-lanceolate ; lowest 

 pinnl. deeply pinnatifid, with simple or forked conspicuously spinuloso-dentate 

 linear segm., 2-3 lin. 1. ; sori usually solitary, placed on the upper pinnse at the 

 base of the anterior pinnule at the outer side ; invol. large, ovate, fully a line deep, 

 divided about halfway down ; valves nearly entire. 



Hab. Fernando Po, Mann, 333. Much resembling H. multifidum and bivalve in habit, 

 but the segments are broader, and the sori are much larger and usually solitary. It is 

 the only Leptocionium which has yet been found in Tropical Africa. 



62. H. bivalve, Swartz ; st. 2-4 in. 1., wiry, naked ;fr. ovate-triangular, tripin- 

 natifid, 3-8 in. 1., 2-3 in. br. ; main rachis slightly winged above ; the second. 

 rachis winged throughout ; lower pinnae triangular-acuminate ; ult. segm. linear, 

 2-3 lin. 1., spinuloso-dentate ; sori very numerous, often 6 to 8 on a single pin- 

 nule ; invol. suborbicular, entire, divided down nearly to the base ; recept. always 

 included. #. Sp. Fil. 1. p. 98. t. 35. D. H. pyriforme, V. D. B. 



Hab. New Zealand. Best distinguished from H. multifidum by the shape of the 

 involucre. The frond is broader below and the sori are more abundant. 



63. H. Smithii, Hk. ; st. 1-2 in. 1., wiry, naked or slightly tomentose ; fr. 

 oblong-acuminate, 8-8 in. 1., 2-3 in. br., bipinnatifid ; rachis winged above, cili- 

 ated below ; pinnae oblong-triangular, with a winged rachis and simple or 1 to 4 

 times forked linear spinuloso-serrate segm. ; sori 1 to 4, terminal on the segments 

 of the pinnse on both sides ; invol. oblong-, small, divided about halfway down ; 

 valves entire. Hk. Sp. 1. p. 97. t. 35. B. L. serrulatum, Preslii, affine and 

 holochilum, V.D.B. 



Hab. Philippine Islands, Java, and Malayan Peninsula. L.flaccidum, V. D. B., is a 

 plant gathered by Drs. Hooker and Thomson in the Khasia Mountains, which resembles 

 this in habit, but has a broad undulato-crispate wing to the main rachis and slightly 

 crisped pinnse. Probably it is a distinct species ; but I have not seen the fruit. 



64. H. fucoidcs, Swartz ; st. 2-4 in. 1., wiry, ciliated ; fr. oblong, tripinnatifid, 

 4-6 in. 1., 1^-2 in. br. ; main rachis winged above and ciliated ; the second, rachis 

 wiuged throughout ; pinnae rhomboidal-acuniinate, with long narrow spinuloso- 



