121 



28. P. curvatum, Swartz. — Stipites tufted from a fibrous finely scaly 

 erect rootstock, short, flattish, winged to the base ; fronds pendent, 

 9-18, or more in 1. 1^-4 in. w. coriaceous an I brittle; glabrescent, or 

 puberulous with white granular dust pale or dark green above, gray- 

 ish beneath ; reduced at the base, pinnatifid nearly to the flat com- 

 pletely immersed rachis ; pinnae spreading, linear usually rather un- 

 equal in length, 1-2 in 1. 2-3 li. w. at the dilated obliquely adnate con- 

 fluent base, tapering outwards to the usually obtuse point, with an 

 acute or rather open sinus between ; margins entire or slightly sinuate- 

 repand, thin ; veins usually forked, both branches a little short of the 

 margins ; son round or oval, terminal on the anterior limb, about ^th 

 in. apart in a long marginal row on each side — P incequale, Fee, Fil. 

 Ant. t. 12. 



A Fronds £ in. w. lin ar, uniform in width throughout, ^-1^ ft. 1. 

 segments oblong, blunt, close, with the sori usually in the outer £>art. 



Common in the forest above 5,000 ft altitude on trees. A pecu- 

 liar species, showing no close affinity with any local species, of a gray 

 leathery appearance, very brittle, and the whole vascular ramification, 

 including stipe and rachis, concealed under the parenchyma, as in 

 some of the smaller species. A is found in Coffee fields on decaying 

 logs at 2,500 ft. altitude : gathered at Murray's flat Mt. Moses. The 

 fronds are uniformly linear reaching 1^ ft. or more long, the inner 

 half or more being dead and brown in the longer ones. This is near 

 P. Pearei, Baker. 



29. P. Ottites. Swartz. — Rootstock fleshy, repent, as thick as a quill 

 ■or less, densely clothed with bright reticul <ted scales, which are mixed 

 with tomentum ; stipites erect, serial, apart, but often contiguous, 1-2 £ 

 in. 1., dark, slightly ciliate or naked, faintly margined above ; fronds 

 erect, 4-9 in. 1. f -1£ in. b , little or hardly reduced at the very base, 

 the apex terminating in a sinuate subentire segment, pinnate, elastico- 

 membranaceous glabrescent, dark or brownish-green, pinnae sp;eadino- 

 or erectu-spreading, f^-l in. 1. 1-1^ li. b., entire or crenate-sinate, 

 linear-oblong, obtusely pointed, adnate decurrent to the slender, dark, 

 stiffish, ciliate or glabrescent rachis, with a clear space once or twice 

 their own width between, or narrowly confluent by a rounded oblique 

 more or less open sinus ; veins oblique, simple, or rarely furcate at the 

 apices, terminating much short of the margin, midvein flexuose ; sori 

 terminal, (on the anterior branch when the vein is forked), medial 

 nearly \ in. apart. Plum. Fil. t. 85. P. tenuifolium, H. B. K. 



Infrequent on wet rocks in forests of Portland at about 2,000 ft. alt.; 

 resembles graveolens and capillar e somewhat in the pinnae, but the 

 texture is thinner and more elastical, and the rootstock quite different, 

 with few stiff straight petioles and fronds. Only the basal pair of 

 pinnse are usually reduced. 



30. P. trifurcatum, Linn.— Rootstock short-creeping, 2 or 3 1. thick, 

 densely clothed with bright slightly ciliate-edged scales ; stipites wiry, 

 tufted, 3-5 in. 1., dark, clothed thinly with spreading aureous hairs ; 

 fronds linear-lanceolate, densely pellucid-dotted, chartaceous, dark 

 green, naked or slightly villose, especially on the margins, 5-10 in. 1. 

 f-lj in. w. or over, the base shortly cuneate, the apex obtuse and sub- 

 entire, obliquely lobed ^rd or rather more to the slender flexuose co- 

 vered rachis ; lobes entire about \ in. w. and as much or less d., close^. 



