80 17. TRICHOMANES, EUTRICHOMANES. 



Hab. Hongkong, 0. Wright. We owe the discovery of this species to the United 

 States North Pacific Exploring Expedition of 1853-6, under Capts. Blnggold and 

 Rodgers. 



44. T. humile, Forster ; rhizome creeping, deeply intermatted ; st. J-| in. 1., 

 slender, winged above ; fr. 1-2 in. 1., \ in. br., bipinnatifid, lanceolate-oblong in 

 general outline, cut down to a narrowly- winged rachis ; segm. pinnatifid, with 

 simple or once-forked linear lobes ; substance membranaceous, surface and margin 

 naked ; a central costa only in each segment ; no spurious venules ; sori solitary, 

 on the upper side of the pinnse, tube more or less exserted, the mouth spreading, 

 two-lipped. HTc. Sp. 1. p. 123. Hk. Gr. Ic. FiL t. 35. (3, T. Endlicherianum, 

 Presl ; fr. more elongated ; segm. narrower and less branched. T. erectum, 

 Brackenridge. 



Hab. Java, New Zealand, and Pacific Islands. T. aureum, V. D. B., differs from the 

 type by its longer and broader slightly-crisped segments. 



45. T. brachypus, Kunze ; rhizome long, wiry, wide-creeping, more or less 

 tomentose ;fr. 1-2 in. apart, nearly sessile, 3-6 in. 1., 1-1^ in. br., once pinnatifid, 

 cut down to a broadly-winged rachis ; lower pinnce oblong, blunt, ^-1 in. 1., |~^ br., 

 varying from nearly entire to cut down to a broadly-winged rachis with linear 

 lobes ; texture membranaceous ; surface nearly naked or ferrugineo-tomentose, 

 especially on the veins ; veins prominent ; lot. veins of the pinnae parallel and 

 erecto-patent ; no spurious venules ; sori I to 12 to a pinna, placed at the edge of 

 the lower half on both sides, tube long, cylindrical, stalked, mouth scarcely 

 spreading. Hk. Sp. I. p. 121. T. Ankersii, Parker, in Hk. Gr. Ic. Fit. t. 20i. 

 (3, T. Tanaicum, Hk. ; fr. 6-9 in. 1., linear, undivided ; sori in long rows on 

 both sides. 



Hab. Tropical America, from the West Indian Islands southward to Peru and the 

 South of Brazil. A very distinct plant, which corresponds to the genus Lacostea of Van 

 den Bosch, who makes nine species. 



46. T. pallidum, Blume ; rhizome wide-creeping, slender, tomentose ; st. 1-3 

 in. 1., slender but wiry ; fr. 2-6 in. 1., 1-1^ in. br., ovate-lanceolate acuminate, 

 bipinnatifid, just divided down to a narrowly- winged rachis ; lower pinnce ovate- 

 rhomboidal, divided more than halfway down, and the lobes again slightly cut ; 

 substance subcoriaceous, both surfaces, when dry, often decidedly coated with 

 white, always more or less clothed with strong light-brown hairs ; veins broad 

 and few ; sori 1 to 4 to a pinna, axillary on the segments on both sides, the tube 

 nearly sunk, the mouth dilated, but scarcely two-lipped. Hk. Sp. 1. p. 139. 

 T. glauco-fuscum, Hk. Sp. 1. p. 128. t. 40. A. T. album, Blume, Hk. Sp. 1. 

 p. 129. 



Hab. Malayan Peninsula, Ceylon, Java, Sumatra, and Pacific Islands. This cor- 

 responds to the genus Craspedoneuron of Van den Bosch, who makes four species. The 

 pallid hue of the dry frond is very peculiar, arid the coating of hairiness is sometimes 

 very prominent, but is sometimes nearly deciduous. 



47. T. serratulum, Baker ; rhizome slender, wide-creeping ; st. slender, naked, 

 about J in. 1. ; fr. under \ in. 1., about |- in. br., oblong or subrhomboidal in 

 general outline, pinnatifid down to a narrowly- winged rachis ; segm. erecto-patent, 

 in 2-6 pairs, linear, simple or forked, J in. 1., under ^ lin. br., toothed at the 

 margin, texture membranaceous ; a central costa only in each segment ; spurious 

 venules none ; sori 1 to 2, terminal on the upper segments, the tube exserted or 

 even stipitate, the mouth slightly two-lipped, deeply ciliated with sharp linear 

 teeth. 



Hab. On trees, Lobong Peak, Borneo. Kesembling T. calvescens, Lyallii, and denticu- 

 latum in its toothed segments, but different in other respects, and a very distinct 

 species. 



