17. TRICHOMANES, EUTR1CHOMANES. T5 



18. T. apodum, Hk. & Gr. ; rhizome strong, wide-creeping, tomentose, irregu- 

 larly pinnate ; fr. subsessile, \-\ in. each way, orbicular-cordate, with broad 

 deep lobes and scattered stellate tufts of cilise on the edge ; second, veins distant 

 and but little branched ; sori solitary, terminal, quite exserted, the mouth dilated 

 and distinctly two-lipped. //. Sp. 1. p. 118. Hk. & Gr. Ic. Fil. t. 111. 

 Didymoglossum, V. D. B. 



Hab. Tropical America, both the islands and mainland. 



19. T. Henzaianum, Parish ; st. 1-2 lin. 1. ; fr. -| in. each way, thin in tex- 

 ture, orbicular or obovate-cuneate, bluntly lobed or slightly tending towards 

 palmate ; lat. veins rather distant ; spurious venules copious ; sori 1 to 6, placed 

 near the centre of the outer margin ; invol. sunk in the frond, the mouth dis- 

 tinctly two-lipped. Parish in Hk. 2. Cent. Ferns, t. 1. 



Hab. On trees, Moulmein, Pegu, Henzai & Parish. 



20. T. muscoides, Swartz ; fr. shortly stalked, 1-3 in. 1., J-| in. br., varying 

 in shape from linear-oblong to suborbicular, nearly entire or bluntly lobed, 

 especially above ; spurious venules faint but copious ; sori 1 to 8, terminal on the 

 lobes, the tube sunk in the frond, the mouth free, dilated, but usually scarcely 

 two-lipped. Hk. Sp. \.p. 117. 



Hab. Tropical America, Asia, Polynesia, and Africa. Sir W. Hooker was disposed to 

 place here eight species of Van den Bosch, authentically represented in his collection ; 

 viz. muscoides, sublimbatum, CKrugineum, erowm, Hookeri, Lenormandi, bimarginatum, and 

 Kapplerianum. The first of these is considered by that author as & Hemiphlebium (mouth 

 distinctly two-lipped), and the two next he separates from the other five by the character 

 of "spurious venules free, joined together towards the margin." T. Schaffneri, Schlt., 

 T. Pabstianum, C. Mull., and T. crispulum, V. D. B., are closely allied plants not repre- 

 sented by name in the Hookerian collection. 



** Fronds entire below, palmate or digitate above. Gonocormus, V.D.B. 



Sp. 21-30. 



21. T. parvulutn, Poiret ; rhizome wide-creeping, interlaced ; st. 1 in. 1., wiry, 

 slender, tomentose below ; fr. ^-| in. each way, orbicular in general outline, 

 cuneate or truncate at the base, flabellately cut about halfway down from the 

 outer edge in the direction of the base into narrow irregular segments ; veins close, 

 prominent, so that the frond when dry appears channelled, dichotomous at a 

 very small angle ; spurious venules numerous ; sori 4 to 6, terminal on the 

 central segments, the tube quite sunk in the frond, the mouth dilated at the 

 sides. Hk. Sp. p. 118. t. 39. A. 



Hab. Japan, China, the Malaccas, Java, Polynesian Islands, Madagascar, and Johanna 

 Island. 



22. T. saxifragoides, Presl ; st. J in. 1., slender, tomentose below ; fr. 2-3 lin. 

 each way, flabellato-suborbicular in general outline, cut from the margin in the 

 direction of the apex of the stipe into numerous linear-acute segments^ the 

 deepest divisions scarcely reaching halfway down ; veins close, prominent, irre- 

 gular; sori 2 to 4, the tube sunk in the 'frond, the mouth dilated, spreading, 

 scarcely two-lipped. 



Hab. Java, New Ireland, Fiji and Philippine Islands. Very near T. parvulnm,, from 

 which it differs by its smaller and less deeply cut fronds, and the dilated mouth of the 

 involucre. Van den Bosch assigns to T. minutum, Blume, proliferous stipes ; but I cannot 

 distinguish from this his specimens thus marked in the Hookerian collection. 



23. T. Mannii, Hk. MSS. ; rhizome wide-creeping ; st. |-1 in. 1., slender, 

 tomentose below ; fr. -1 in. each way, suborbicular in general outline, deeply 



