17. TRICHOMANES, EUTRICHOMANES. 77 



28. T. calvescens, V. D. B. ; at. 1-2 in 1., filiform, 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 

 sf-gm.^ with only a central costa in each ; sort 2 to 4 terminal on the central 

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

 dilated deeply and irregularly toothed naked two-lipped mouth. V. D. B. 

 Suppl. 2. p. 115. 



Hab. N. S. Wales, Major Vicary. This also would be quite as suitably ranked under 

 Hymenophyllum in the section Leptocionium as here. 



20. T. Lyattii, Hk. MSS. ; st. 1-2 in.L, slender, filiform ; fr. f-2 in. each way, 

 suborbicular in general outline, 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 ciliated, not dilated. Hymenophyllum, Hk. fil. 

 FI.N.Z.2-IG. 



Hab. Trees, south-west coast of the middle island, New Zealand, Dr. Lyall. Quite 

 intermediate between the typical Hymenophylla and Trichomanes in the shape of its 

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



30. T. nanum, V. D. B. ; rhizome slender, wide-creeping ; st. very short ; fr. 

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

 portion not more than \ in. broad, divisions simple or once branched ; ult. segm. 

 ]^-21in. 1. by ^ lin. br. ; texture thick but not rigid, surface somewhat undu- 

 lated, margin hounded 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 in irregular plications. V. D. B. 2. Suppl. p. 122. 

 Crepidomanes, V.D. B. 



Hab. Assam, Griffith, Closely resembling T. intramarginale in texture, but quite 

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



**# fronds more or less deeply pinnatifid > but not truly pinnate. Sp. 31-57. 

 f Main rachis distinctly winged throughout. Sp. 31-47. 



31. T. pusillum, Swartz ; rhizome wide-creeping, tomentose ; fr. 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. Hk. Sp. 1. p. 117. T. quercifolium, Hk. & Gr. Ic. Fil. t. 115. Hemi- 

 phlebium, F. D. B. T. Robinsoni, Hk. MISS. 



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

 and Peru. Kranz-kop, Natal, Robinson; Moulmein, Rev. C. S. Parish. 



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

 nearly so, 1-3 in. 1., \ in. br., obJong, 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. Hk. Sp. 1. p. 120. Hk. $ Gr. Ic. Fil t. 149. 

 Hemiphlebium, V. D. B. /3, crispatum ; pinnoz deeply lobed or pinnatifid, 

 broadly and conspicuously crisped, their secondary veins more numerous and 

 divaricated than in the type, sometimes again branched. 



