16. HYMENOPHYLLUM. 61 



Hab. India, from Nepaul and Sikkim to Ceylon, the Malayan Peninsula, the Philip- 

 pines, New Zealand, and Australia. H. eroswni of Blume, and ff. Eeiuwardii, V. D. B., 

 also belong here. 



22. H. demissum, Swartz ; St. 4-6 in. ]., erect, firm, wingless ; fr. 4-12 in. I., 

 3-4 in. br., ovate-triangular, 3-4 times pinnatifid ; rachis only slightly winged 

 above ; lower pinnce 2-3 in. 1., triangular-rhomboidal, divided down very nearly 

 to the rachis into numerous pinnls. on both sides, which are again divided down 

 nearly into the rachis into pinnatifid segm. ; ult. lobes 1-2 lin. 1., ^ lin. br. ; 

 sori very numerous (20-30) to a pinna, terminal and axillary on the segments 

 on both sides ; invol. divided down nearly to the base ; valves ovate, entire, or 

 denticulate. — Hk, Sp. 1. p. 109. H. productum, Kunze. 



Hab. New Zealand, Fiji, Java, the Philippines, and adjacent Polynesian Islands. — A 

 larger and stronger plant than H. polyanthoSj with which Sir W. Hooker was disposed to 

 join it, with ample glossy deeply-cut fronds and very numerous involucres. 



23. H. caiidkulatum, Mart. ; st. 4-6 in. I., wiry, broadly winged above ; fr, 

 6-12 in. 1., 2-3 in. br., orate-acuminate, tripinnatifid ; main rachis furnished 

 throughout with a broad slightly crisped wing ; lower pinnce rhomboidal-lanceo- 

 late, erecto-patent, often 2 in. 1., divided down to a broad central rachis, the 

 lower pinnl, again pinnatifid, the upper forked or simple, broadly linear; sori 

 2-12 to a pinna, placed at the apex of the segments on both sides ; invol. very 

 large (J in. br.), divided down nearly to the base ; valves twice as broad as deep, 

 and bluntly toothed. — Hk. Sp. \. p. 102. — fi, H. caudatum,Y.Ti.'B. ; wing of 

 the main and also of the second, rachis considerably crisped and undulated. 



Hab. Brazil, Peru, and Chili. — Wing of the main rachis often 2 lines wide. 



24. H. recurvum, Gaud. ; St. 2-4 in. 1., winged above ; fr. 4-12 in. ]., 2-3 in. br., 

 flaccid, pendent, oblong-acuminate, tripinnatifid ; main rachis narrowly winged 

 throughout ; ^nnce flaccid, erecto-patent, distant, elongated, divided down nearly 

 to the rachis into long simple or forked or slightly compound pinnls. ; ult. segm. 

 J-f in. 1., 5 in. br., sori 2-6 to a pinna, generally axillary ; invol. divided about 

 halfway down ; valves rounded, slightly forked. — Hk. Sp. 1. p. 104. t, 2iJ. C. 



Hab. Sandwich Islands, frequent. 



25. 'R.jlahellatum, Labill. ; st. 2-4 in. 1., firm, erect ; fr. 4-12 in. 1., 2-4 in. br., 

 ovate-acuminate, tripinnatifid, somewhat glossy and flaccid ; main rachis winged 

 above ; lower pinnce 1-2 in. 1., broadly rhomboidal-acuminate, erecto-patent, 

 divided down to a broadly winged rachis into several cuneate-based ^z«m&., which 

 are furnished on both sides with several linear segm. ; sori 6-20 to a pinna, ter- 

 minal on the lateral segments ; invol. divided more than halfway down ; valves 

 lonnied, entile.— Hk. Sp. 1. p. in. H. nitens, .Sr. Hk. d: Gr. Ic. Fil. 197. 



Hab. Australia, New Zealand, Lord Auckland Isles. — Very variable in the compact- 

 ness, size, and degree of elongation of the frauds. H. IJookerij Bory and V. D. B., is a 

 small" form with narrower involucres than in the type. A plant from Sumatra must 

 probably be referred to this species. 



26. H. scahrum, A. Rich.; St. 2-4 in. 1., strong, wiry, ciliated ; fr. 6-15 in. 1., 2-5 

 in. br., ovate-acuminate, tripinnatifid ; main rachis winged above, thickly ciliated 

 with long brown bristly hairs ; lower pinnce 2-3 in. 1., erecto-patent, oblong- 

 rhomboidal acuminate, divided down nearly to the rachis into several pinnl, 

 on both sides, which are again pinnatifid with compound lower and simple linear 

 upper segm.; sori 6-20. to a pinna, terminal on the lateral segments on both 



