86 17. TRICHOMANES, EUTRICHOMANES. 



naked, 2-4 in. 1. ; Jr. 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 

 pinnae 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; sari 1 to 4 to a pinnule, tube quite sunk, mouth slightly spreading 

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

 T. Lindeni, Presl. 



Hab. Cuba and Jamaica. Differs from all the following species by its membranaceous 

 segments. 



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

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

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

 top ; lower pinnae 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 ; sort 2 to 12 to a pinnule, small, axillary, the tube more 

 or less exserted, the mouth slightly dilated. //. Sp. Fil. !./>. 133. Beddome, 

 Fil. Ind. t. 8. Sturm, Brasil. t. 18. /. 12. T. strictum, Hk. & Gr. Ic. Fil. t. 122. 

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

 often imbricated ; iwoal. slightly two-lipped. #. Sp. 1. p. 134. Ic. PL t. 701. 



Hab. Tropical America, Cuba, and Mexico southward to Peru and Bio 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 Mandioccanum, obscurum, Dregei, Boivini, achitlece- 

 folium, tamarisciforme, flavo-fuscescens, pumilum, dentatum, and longicollum. 



71. T. meifolium, Bory ; st. tufted, 4-6 in. 1., strong, erect, more or less 

 fibrillose, and the tuft densely so at the crown ; Jr. 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^ in. br., lanceolate-acuminate ; pinnl. with numerous segm., 

 which are again cut down irrto 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. \.p. 

 137. T. apiifolium, Presl. T. Bauerianum, Endl. T. exaltatum, Brack. 

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

 lipped. -Hk. Sp.l.p. 138. Ic. PI. t. 703. 



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

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

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



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

 fr. 12-18 in. 1., 6-9 in. br., ovate, quadripinnatifid ; pinnce erecto-patent, ovate- 

 lanceolate, the largest 4-6 in. 1., 2 in. br. ; 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. 1., slightly flattened, texture subrigid, surface naked, 

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

 invol. cylindrical, the mouth dilated, but not two-lipped. Hk. Sp. 1. p. 137. T. 

 anceps, /3, Hk. Sp. 1. p. 135, t. 40. C. 3. T. intermedium, P. D. B. 



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

 more divided pinnae 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. 



