86 17. TRICIIOMAXDS, §§ EUTf, ICIIOMANES. 



naked, 2-4 in. 1. ; ft: 6-18 in. 1., 3-6 in. br., fully pinnate, or the rachis very 

 slightly winged above, ovate-acuminate in general outline, the rachis hairy ; lower 

 pinnce ovate-lanceolate, nearly pinnate, 2-4 in. 1. ; pinnl. divided down to a 

 narrow wing and segm. again pinnatifid about halfway down, margins finely 

 hairy ; substance finely membranaceous, several fine veins in each ultimate 

 segment ; sori 1 to 4 to a pinnule, tube quite sunk, mouth slightly spreading 

 with two lateral projections. — Hk, Sp. 1. p. 140. T. macroclados, Kunze. 

 T. Lindeni, Prcsl, 



Hab. Mexico, Cuba, and Jamaica. 



70. T. rigidum, Swartz ; st. tufted, erect, wiry, 2-8 in. 1., naked or very 

 sliglitly winged above ; fr. 2-8 in. 1., 2-6 in. br., deltoid or ovate-acuminate, tri- 

 or quadri-pinnatifid, the main rachis usually only sliglitly winged towards the 

 top ; lower pinnce 2-3 in. 1., erecto-patent, ovate or lanceolate-rhomboidal, cut 

 down to a rachis which is very narrowly winged throughout or free below ; 

 pinnl. deeply pinnatifid, with deeply toothed or even pinnatifid linear lobes ; 

 texture subcoriaceous, colour dark-green, nearly black when dry, nearly naked, 

 often slightly crisped ; sori 2 to 12 to a pinnule, small, axillary, the tube more 

 or less exserted, the mouth slightly dilated. — Hk. Sp. Fil. 1. p. 133. Beddome, 

 Fil. Ind. t. 8. Sturm, Brasil. t. 18. f. 12. T. Harveyi and Seemanni, Carruth. 

 — /3, T. elongatum, Cunning. ; fr. deltoid, segments broader, pinnae and pinnules 

 often imbricated ; invol. slightly two-lipped. — Hk. Sp. 1. p. 134. Ic. PI. t. 701. 



Hab. Tropical America, Cuba, and Me^fico southward to Peru, and Rio Janeiro ; Poly- 

 nesian Islands, New Zealand, Japan, Malayan Peninsula, S. China, S. Hindostan, Ceylon, 

 Mascaren Isles, Natal, Cape Colony, Angola, Fernando Po. — Here belong numerous 

 species of Van den Bosch, including M andioccanum, ohscurum, Dregei, Boivini, achillece- 

 folium, tatnarisciforme, pumilum, dentatum, and loiigicoUmn. 



71. T. apiifolium, Presl ; st. tufted, 4-6 in. L, strong, erect, more or less 

 fibrillose, and the tuft densely so at the crown ; fr. 9-18 in. 1., 4-8 in. br., ovate, 

 quadri-pinnatifid, the main rachis only slightly winged towards the apex; lower 

 pinnce 4-6 in. 1., 1-1 1 in. br., lanceolate-acuminate ; pinnl. with numerous segm., 

 which are again cut down into slightly flattened ultimate divisions, about 

 1 lin. 1. ; texture subrigid, surface naked, a single costa only in each segment ; 

 sori 2 to 12 to a pinnule, small, the involucre short, turbinate. — Hk. Sp. 1. 

 p. 137. T. meifolium, edit. 1. T. Bauerianum, Efidl. T. exaltatum. Brack. — 

 — /3, T. polyanthos, Hk. ; sori larger ; invol. \ in. deep, 1 lin. br., cupshaped, two- 

 lipped.— i7/l-. Sp. 1. p. 138. Ic. PL t. 703. 



Hab. Philippine Islands, Java, Polynesian Islands, and Norfolk Island. — This resembles 

 T. maximum in general outline, but the hibit is more graceful, the texture more delicate, 

 and the involucres are much smaller and shorter, verging upon those of 'Hymcnophyllum. 



72. T. maximum, Blume ; rhizome stout, creeping ; st. strong, erect, 3-6 in. 1. ; 

 yr. 12-18 in. 1., 6-0 in.br., ovate, quadripinnatifid ; pinnce erecto-patent, ovate- 

 lanceolate, tlie largest 4-6 in. 1., 2 in. l)r. ; pinnl. lanceolate-deltoid, 1 in. or 

 more 1., cut down to the rachis into segm., which are again deeply pinnatifid ; 

 ultimate segm. 1^-2 lin. I., slightly flattened, texture subrigid, surface naked, 

 dark-green ; a central costa only in each segment ; sori 2 to 8 to a pinnule ; 

 ini^ol. cvlindrical, the mouth dilated, but not two-lipped. — Hk.Sp. \. p. 137. T. 

 anceps,'j8, Hk. Sp. i. p. 135, t. 40. C. 3. T. intermedium, V. D. B. 



Hab. Java, Borneo, and Polynesian Islands. — A larger plant than T. rigidum, with 

 more divided pinnsB and narrower segments. 



73. T. Prieurii, Kunze ; st. stout, tufted (sometimes 2 lin. thick below), 

 4-8 in. 1., naked or slightly tomentose, sometimes the upper part winged ; fr. 



