8 



Var. cordifolium. 



Fronds cordate — rounded, rarely oval or oblong, £-f in. diameter, mostly entire. Didymoglossum 

 cordifolium, Fee, Fil. Ant, t. 28., f. 4. 

 Var. minor. 



Fronds lance-shaped or oblong, 1 - 3 or 4 li. 1., entire, with a single terminal sorus. 



Common among the lower hills in damp shade growing on the stems of trees, tree ferns, and rocks ; 

 very variable but easily recognised in any of its forms by the marginal streak. The large variety 

 grows on the trunks of Cyathea elegans, and is most beautifully thin, translucent, and pale-green. 

 10. T. pinnatum, Hedw. 



Stalks tufted, 2 — 8 in. 1., narrowly margined above, fronds pinnate or pinnately divided, membranous, 

 naked, variable in size and in the number of the pinna), 3 — 6 in. 1. or more, 2-3 or 4 in. br., pinna; 

 finely toothed 1 — 2 in. 1., \ — \ in. br., spreading, upper decurrent on the inferior base, the superior 

 side free, terminal pinna like lateral, or changed into a long rooting whip-like extension ; veins very 

 close, simple or forked ; 



sori very copious, along both margins and descending the decurrent base ; 



involucres small, free, stalked, close, cylindrical, the mouth blunt, or rather contracted or dentate ; 

 receptacles protruding. — Neurometries Hedwigii, V.D.B. 

 var. T. Jtoribundum, H.B.K. 



Much larger ; pinnae 6 — 9 in. 1., \ in. w., the terminal one sometimes changed and rooting. — T. 

 pennatum,1L\i. 



var. T. Vittaria, D.C. 



Barren fronds pinnate, prostrate ; fertile entire, lance-shaped, erect, 1-2 ft. 1., 1^ in. w. 



The only specimens of this I have seen ascribed to Jamaica are in the Kew Herbarium. These 

 belong to the type, but Van Den Bosch also ascribes the var. ftoribundum to Jamaica. Both, I think, 

 require confirmation. 



11. T. spicatum, Hedw. 



Sterile fronds, deeply pinnately — divided, 3 — 6 in. 1., 1£ — 1J in. br. on wiry stalks that are about 

 1 in. 1. ; fertile fronds simple, rachi-form, barely £ in. w., 2-5 in. 1. on stalks of equal length ; 

 sori very close ; 



involucres free to the base, oblique, the mouth blunt or two-toothed ; rachis devoid of connecting 

 membrane to the involucres, or with only a very slight marginal wing ; receptacles protruding. Feea 

 polypodina, Bory. 



" Rare in the Portland woods, near Golden Valley, July, 1843." Purdie. " Retreat plantation, 

 3,500 ft , John Crow Hill, near Bath, in rivulet courses, stiff yellow clay, moist and shaded." There 

 is no collector's name to the last note, attached to Jamaica specimens in the British Museum, but it was 

 probably collected by Wilson, formerly Curator of theBath Garden. A specimen I possess myself was 

 gathered near Bath, and the species has since been found, I believe, in Portland by Mr. Syme, late of 

 the Botanical Department. In T. elegans, Rudge, of Trinidad and Guiana, the involucres are connected 

 their full depth by membrane. 



12. T. sinuosum, Rich. 



Stalks ^-1^ in. 1., scattered on a thread-like free-creeping rootstock ; fronds pendent, thin, mem- 

 branous, pellucid, pale-green slightly hairy on the ribs and margins, the hairs of the latter star-shaped, 

 3-9 in. 1., |-1 in. w., cut to the broad wing of the rachis into short angular oblong lobes, which are 1^-3 

 li. w. ; veins lax, pinnate in the larger lobes, branches few simple, very oblique ; 



sori 1-3 on the outer part of the lobes, which are slightly and obtusely toothed ; 



involucres immersed to the rim of thd broadly dilated mouth, receptacles generally protruding. 



Infrequent, in moist forests, on the stems of tree-ferns, 1000-2000 ft. alt., and though sparse in 

 quantity, widely spread through the island. In the eastern parishes it seems to grow only on the 

 trunks of Cyathea elegans. The fronds are finger-shaped, one to two sori to a lobe, rarely more ; colour 

 very pale, and substance so thin that the veins show as a conspicuous feature. 



13 T. pinnatifidum, V. D. B. 



Stalks on a slender wiry rootstock, 1-2 in 1 , winged upwards, fronds oblong, or oblong-lance- 

 shaped, widest at or above the base, thin and membranous, pellucid, pale or gray-green, 2-4 in. 1., l-ty 

 in. br., pinnately-divided, the rachis broadly-winged ; pinnae oblong, spreading, £-1 in. 1., blunt, lobed 

 on each side as is also the attenuated top of the frond ; veins pinnate, branches 4-6 to a side, rather 

 distant ; 



sori 1 — 3 to a pinna, on the superior side, sub-axillary, or on the lobes of the top of the fronds ; 

 involucres fully immersed to the broadly dilated mouth. 



Collected by March, whose specimens are in the Kew Herbarium, but have no specific locality. 

 It very closely resembles the preceding in texture and colour, but in form is broader and more deeply 

 lobed, and the sori are in, or near, the axils of the lobes of the pinnae, or in the smaller lobes more 

 terminal. 



14. T. crispum, L. 



Stalks 2-6 in. 1., rusty tomentose, not margined, more or less tufted on a strong, fasciculate, 

 tomentose, shortly creeping rootstock ; fronds 6-10 in. 1., l|-3 in. w., oblong-lance-shaped, broadest 

 near the base, more or less hairy, with rusty coloured velvety hairs on the rachis, membranous but 

 firm ; pinnately divided, the rachis very slightly margined with membrane ; pinnae close, sometimes 

 overlapping, horizontal, oblong, 1-1| in. 1., f-f in. w. ; margins crisped and with rounded teeth ; veins 

 repeatedly forked ; 



sori several, on the outer part of (usually) the upper pinnae ; 



involucres cylindrical, immersed, the mouth slightly two lipped, or more expanded, and the 

 corners somewhat projecting ; receptacles sometimes protruding and sometimes not. 



