17. trichgma:n£s, §§ eutbicuomaxes. 77 



28. T. calvescens, V. D. B. ; g(. 1-2 in. 1., jfiliform, naked ; fr. about -| in. each 

 way, inversely triangular or rhomboidal in general outline, flabellately divided 

 down nearly to the rachis into slightly dichotomous denticulate broadly linear 

 segm., with only a central costa in each ; sori 2 to 4, terminal on the central 

 segments ; invol. turbinate or obconical, sunk in the frond, with a free, broad 

 dilated deeply and irregularly toothed naked two-lipped mouth. — V. £>. B. 

 Suppl. 2. p. 115. 



Hab. N. S. Wales, Major Vicary. — Probably a mere variety of the last. 



29. T. lA/aUii, Hk. MSS. ; st. 1-2 in. 1., slender, filiform ; fr. i-2 in. each way, 

 suborbicular in general outUne, flabellately divided down very nearly to the 

 base into dichotomously-branched narrowly linear ciliated and minutely den- 

 ticulate segments ; sori 3 or 4, terminal on the segments ; invol. obconical, quite 

 sunk in the tube, the mouth ciUated, not dilated.— Hymenophyllum, Hk. fil. 

 Fl. N. Z. 2-16. 



Hab. Trees, south-west coast of the middle island, New Zealand, I)r. Lyall. — Quite 

 intermediate between the typical Symmophylla aud Ti-ichomanea in the shape of its 

 involucre, the breadth of the orifice of which nearly equals the depth of the tube. 



SO. T. nanum, V. D. B. ; rhizome slender, wide-creeping ; St. very short ; fir. 

 not more than ^in. each way, cuneate below, the outer margin rounded, central 

 portion not more than 5 in. broad, divisions simple or once branched ; uU. segm. 

 1^-2 lin. 1. by J lin. br. ; texture thick but not rigid, surface somewhat undu- 

 lated, margin bounded by a thickened line ; a central vein only in each segment ; 

 sori 1 to 2 to a frond, sub-terminal, tube turbinate, not at all exserted, the 

 mouth dilated, undulated ia irregular phcations.— F. i>. 5. 2. Suppl. p. 122. 

 Crepidomanes, V. D. B. T. Kurzii, Beddome, F.B.I, t. 286. 



Hab. Assam and Andamans. — Eesembling T. vntrwrnargitude in texture, but quite 

 different in size, &c., and in division agreeing best with this section. 



***J'ronds m,ore or less deeply pinnatifd, hut not truly pinnate. Sp. 31-57. 

 t Main rOfChis distinctly tmnged throughout. Sp. 31-47. 



31. T. ptisillum, Swartz ; rhizome wide-creeping, tomentose ; Jr. nearly 

 sessile, 2-3 in. 1., ^-1 in. br., oblong or obovate, cuneate-attenuate below, once 

 deeply pinnatifid down to a broadly- winged rachis ; lobes linear or oblong, 

 toothed or deeply pinnatifid, texture membranaceous ; a central costa in each 

 pinna, with numerous erecto-patent secondary veins and spurious venules; sori 1 

 to 4, round the apex of the frond, tube exserted, mouth with two large rounded 

 lobes.— Bk Sp. 1. p. 117. T. quercifoliura. Hi. <^ Gr. Ic. Fil. t. 115. Hemi- 

 phlebium, V. D. B. T. Bobinsoni, Hk. Baker, Linn. Proc. ix. tab. 8. fig. B. 



Hab. Tropical South America, from Mexico and the West Indies southward to Brazil 

 and Fern. Kranze kop. Natal, Robinson. 



32. T. Krausii, Hk. & Gr. ; rhizome wide-creeping, tomentose ; fr. sessile or 

 nearly so, 1-3 in. 1., 5 in. br., oblong, attenuate or cuneate at the base, once 

 deeply pinnatifid down to a broadly-winged rachis ; lobes linear-oblong, nearly 

 entire, or toothed or sinuato-pinnatifid, texture membranaceous ; a central costa 

 in each pinna, with distant pinnate secondary veins passing gradually into spurious 

 venules ; sori 1 to 6, on the apex of the frond, tube more or less exserted, mouth 

 with two large rounded lips.— ^*. Sp. 1. p. 120. Hk. & Or. Ic. Fil. t. 149. 

 llemiphlebiura, V. D. B. 



