115 



"horizontal and connected by the adnate bases, even-margined and quite 

 or nearly equilateral ; veins pellucidly clavate, not excurrent, and with 

 a short fertile spur at the base which bears the round solitary sori 

 forming a line on each side of the rachis ; the sporangia mixed with 

 dark brown hairs. 



This is intermediate between trichomanoides and rigescens. It is 

 a stiffer plant than the former, darker in colour, though the substance 

 is pellucid shewing the veins clearly. The segments, of which there 

 are 70-100 to a side, are close, quite horizontal, rounded, and not 

 dilated or lobuled on the upper margin. On the upper surface there is 

 a dark spot over the end of both the main vein and the soriferous spur. 

 The sori are dark as is also the spreading vestiture of hairs. Found 

 by Mr. Syme some years ago at or near Mt. Moses, St. Andrew, 2,000- 

 3,000 ft. alt. 



15. P nutatum, Jenm.-Rootstock very small and short, clothed with 

 rather squarrose reticulated scales ; stipites tufted, filiform, erect, dark, 

 slightly ciliate or naked, \— § in. 1. ; fronds erect, linear, tapering both 

 to the apex and base, naked, or the margins and rachis beneath 

 slightly ciliate, dark or brownish green, paler beneath ; 3-5 in. 1. 1^-2 

 li. w., pinnatifid almost to the stiffish filiform immersed rachis ; seg- 

 ments obliquely deltoid-oblong, close but shortly decurrent, f — 1 li. 1. 

 less w. blunt ; veins simple in the lobes, not reaching the point; sori 

 solitary, oblong or rather elongate oblong, depressed ; receptacles sunk, 

 causing a superficial ridge on the upper surface. — Journ. Bot. 1886. 

 272. 



Rare in forests on trees at 6,000 ft. alt. A very slender species, 

 marked by its simple veins, obliquely oblong-deltoid, rather decurrent, 

 segments, immersed grammitoid sori and narrow tapering form of the 

 fronds. It is a narrower species than the next, both being very close 

 allies. Of late years they have both been gathered on other of the 

 West India Islands. 



16. P. Rartii, Jenm. — Rootstock very short and small, clothed with 

 dark brown reticulated scales, stipites tufted, few, slender, from hardly 

 any clear to 4 li. 1. ; fronds erect, linear, tapering both to apex and 

 base, stiff and coriaceous, slightly ciliate on the margins, or naked, dark 

 green, paler beneath, 3-5 in. 1. 2-3 li. w., cut almost to the membrane- 

 covered dark filiform rachis into close, round-ended oblong, obliquely 

 adnate segments li. w. 1-1 J li. 1 , basal one deltoid ; a simple vein 

 in each not reaching the apex ; bearing elongated solitary sori sunk in 

 a cavity which forms a ridge on the upperside of the segments, the 

 sides of which are reflexed. — Journ Bot. 1886. 272. 



Rare in forests at 6,000 ft. alt. on trees. The fronds are stiff and 

 erect, though very slender, very much tapered at the top, the segments 

 very numerous, oblong or rather linear-oblong and of equal width from 

 the very little decurrent base to the rounded end. The veins are quite 

 simple, and the sori decurrent along them in the central part, equally 

 short of both apex and base, sunk in a cavity that forms a keel on the 

 upperside ; the margins reflexed and convergent. 



17. P. moniliforme. Lag. — Rootstock free-creeping, forming broad 

 interlaced patches, thick as strong cord, densely coated with rather 

 loose reticulated dark scales ; stipites close or scattered, numerous, 

 wiry, naked, slightly scabrous, dark brown, scariose margined above, 



