11} 



58 16. HYMENOPHYLLUM. (_ 



8. H. rarum, R. Br. ; st. very slender, 1-3 in. 1. ;fr. flaccid, pendent, 2-6 in. 1. 

 by 1-2 in. br., linear-oblong or oblong, bipinnatind, the main rachis winged 

 throughout ; pinnce simple, linear, or forked or pinnatifid, with two or three 

 deeply-cut segments on each side, which are |-| in. 1., 1 lin. br. ; sori large, 

 terminal on the segments of the upper pinnae, often 1 lin. br., divided halfway 

 down or more, the base cuneate, the valves rounded. Hk. Sp. I. p. 101. H. 

 semibivalve, Hk. 8j Gr. Ic. Fil, t. 83. H. natalense and tabul-are, V. D. B. 



Hab. New Zealand, Auckland Isles, Van Diemen's Land, Mauritius, Natal, and Cape 

 Colony. A plant from Chiloe, gathered by Cuming, must probably be referred here ; 

 and in the specimens to which I have access I cannot distinguish the Japanese //. 

 Wrightii, V. D. B., and the Fuegian H. Darwinii, V. D. B. The New Zealand H. imbri- 

 catum of Colenso differs by having the rachis much shortened, scarcely more than 1 in. 1., 

 and the pinnae imbricated and slightly crisped. This and the two preceding differ from 

 the species that follow next by their much broader segments 



9. H. capillaceum, Roxb.; st. about 1 in. 1., slender ; fr. 2-4 in. 1., by 1 in. or 

 more br., oblong, pinnate, with distant segments ; main rachis free throughout ; 

 lower pinnae alternate, about in. distant from one another, broadly rhomboidai., 

 cut down to the rachis in the lower part but winged above ; segm. % in. 1., 1 lin. 

 br., simple or once forked ; sori 2-6 to each pinna, terminal on the lateral 

 segments ; invol. divided down nearly to the base ; the valves orbicular, strongly 

 toothed. Hk. Sp. 1. p. 109. t. 38. B. 



Hab. Confined to the island of St. Helena, where it has been long known. Mucl 

 resembling in habit a slender form of H. Tunbridgense. 



10. H. gracile, Bory; st. 2-3 in. 1., slender, wiry ; fr. 2-6 in. 1., 1-2 in. br., lan- 

 ceolate or oblong-acuminate, tripinnatifid ; main rachis nearly wingless through 

 out ; pinnce distant, 1-3 in. 1., broadly rhomboidai, erecto-patent, cut down 

 within a very short distance of the rachis ; pinnl. sometimes simple, sometimes 

 again pinnatifid, with simple or forked narrowly linear divisions; sori larsje, 2-4 

 to a pinna, terminal or axillary on the lateral segments ; invol. not divided 

 more than halfway down ; valves rounded. Hk. Sp. Fil. I. p. 110. Hk. & Gr. 



Ic. Fil. t. 198. H. inaequale (Poir.) oldest name. 



Hab. Bourlon and Natal, Mauritius. 



11. H. exsertum, Wall. ; st. 1-2 in. 1., slender ; fr. 2-6 in. 1., 1-2 in. br., lanceo- 

 late-oblong, bipinnatind ; main rachis winged above or throughout, more or less 

 densely clothed with deciduous ferruginous hairs; lower pinnce rhomboidai, lan- 

 ceolate-acuminate, divided more than halfway down to the rachis into simple 

 or forked linear pinnules, slightly hairy on the principal veins ; sori 2-8 to a 

 pinna, terminal or axillary on the segments on both sides ; invol. divided down, 

 nearly to the base ; valves oblong, bluntly denticulate at tne apex. Hk. Sp. 1, 

 p. 109. t. 38. A. H. macroglossum, V. D. B. 



Hab. Hills throughout India, from the Himalayas southward to Ceylon. See remarks 

 under H. scabrum. It is recognizable also by the large lanceolate pinnae, which have the 

 central half entire. 



12. H. axillare, Swartz ; st. 1-2 in. i., very slender ; fr. 3-8 in. 1., ^-1 in. or., 

 flaccid, pendent, linear-oblong, tripinnatifid ; main rachis winged throughout or 

 above only ; lower pinnce varying from under ^ in. 1., with simple segments, to 

 1| in. 1., divided down nearly to the rachis, with pinnatifid pinnules with several 

 segments ; uU. segm. not more than 1 lin. 1. ; sori 2-12 to a pinna, terminal 

 ou the lateral segments; invol. divided more than halfway down ; valves rounded, 

 entire. Hk. Sp. 1. p. 111. Hk. & Gr. Ic. Fil. 1. 124. H. apicale, F.D.B. Griseb. 



