69 



fronds, which are often curved laterally falcate-form. It was first dis- 

 covered in 1875 at Morce's Gap and on the slopes of John Crow Peak, 

 when it was referred to P. jungermaniodes, Klotzsch, and again in 

 1889 when it was named after Mr. Fawcett. 



2. P. dendricolum, Jenm. — Rootstock very small, erect, finely fila- 

 mentose scaly ; stipites 1-2 li. 1., densely tufted, erect, brown, 

 clothed with fine castaneous hair-like scales ; fronds simple, linear, 

 erect, 2-3 in. 1. 2 li. w. stiff, dark brown-green, underside paler, both 

 surfaces ciliate, the margins shallowly scalloped above the plain 

 narrowed base ; midrib on both surfaces covered by parenchyma ; 

 veins fine three-branched in each lobule, spreading, the interior fore- 

 shortened and fertile at the apex ; sori one to each scallop, alternate, 

 round, medial apart, superficial, receptacles embossed, dark sub-oblong. 

 Gard Chron. Oct. 20th 1894. 



Apparently very rare, only one plant having been found, on trees at 

 5,000 f . alt., in the highest mountain ranges. It differs from the 

 previous species by its erect habit, stiff, thicker texture, scalloped 

 margins and three-branched spreading veins. 



3. P. gramineum, Swartz. — Rootstock 1-1£ li. thick, short creeping, 

 densely clothed with light brown somewhat squat rose scales ; stipites 

 contiguous, several arising near together, slender, puberulous, f — 1£ 

 in. 1., stiff ; fronds linear-accuminate 3-5 in. 1 , 2-2^ li. w., narrowed 

 and cuneate at the base, tapering and often attenuated at the apex usu- 

 ally more or less curved, stiff and subcoriaceous, grass-green, margin 

 at first slightly ciliate, the surfaces otherwise naked and glossy ; veins 

 oblique, evident on the upper side, forked, both branches reaching the 

 marginal thread ; rachis filiform, covered ; sori oval, rather large, medial 

 on the superior vein branch, sub-parallel with the margin. — tirammi- 

 tis, Sw. 



Common on trees, often in large patches, from 4,000 ft. alt. upwards ; 

 marked from its allies, by the horizontal growth of the rootstock, 

 narrower, grass-like, fronds, with distinct petioles, medial sori, veins 

 excurrent to the marginal thread, which, with both veins and midrib, is 

 covered by the parenchyma. 



4. P. nigro-limbatum, Jenm. — Rootstock small, fibrous, upright or 

 oblique, densely clothed with fine subulate castaneous scales, the roots 

 densely hairy ; stipites wiry, short, dark brown ; fronds erect, stiff, co- 

 riaceous, acute or acuminate, long attenuated to the base, 4-10 in. 1. 

 1^-3 li. w. naked, glossy, green, the plain or repand margin edged with 

 a black glossy thiv ad ; veins close, simple, straight, oblique, clavate, 

 not reaching the margin, the fertile with a spur near the anterior base 

 causing a slight decurvative of the outer two-thirds, both veins and 

 midribs covered by membrane ; sori oval, rather oblique, close forming 

 a double costal series in the upper part of the frond, but rarely reaching 

 the top. Grammitis nigro-li/nbatu, Spruce, Ms. O. nimbata, Fee. 



Frequent on the upper boughs of trees in damp forest along the 

 higher ridges and peaks from 5,000 or 6,000 ft. alt., alone in places, 

 in places, or scattered with the following and nearly as common. The 

 glabrous surface and taper-pointed fronds readily reveal its individuali- 

 ty without the examination of other characters. It has a very wide 

 Andean range in South America. 



5. P. marginellurn, Swartz. — Rootstock slender, elongated, erect, 



