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Pyrrosia Mirbel

Small to medium size climbing epiphytes. Rhizome long-creeping, sometimes-short creeping and +/- compact, densely clothed with elongate or orbicular, dark-centred, entire or fringed, peltate scales, or with paler, basally attached sacles, dictyostelic, often with a sclerotic medullary strand. Fronds shortly to moderately stipitate, the stipe articulate to phyllopodia, winged or terete, several fibro-vascular bundles in an open ring, +/- flared adaxially with 2 longer strands at the constriction, lamina simple, entire, lanceolate or oblanceolate to sublinear, +/- leather, +/- persistently stellate hairy at least on the abaxial surface, not or slightly dimorphic with the fertile fronds or apical parts of fronds narrower and elongate, costa prominent, main lateral veins prominent or obscure (of lacking), straight to the margin, connected by +/- regular cross veins, the areoles each with a few excurrent free veinlets or anastomosis more irregular with free veinlets variously directed, the veinlets often terminated by hydathodes conspicuous on the adaxial surface. Sporangia in discrete round sori terminal on the free veinlets, in several rows between the main veins, or +/- confluent and served by several veins in a single row either side of the costa, superficial or immersed, exindusiate, protected by stellate paraphyses, annulus longitudinal, interrupted, of 14-18 thickened cells, pedicel long, 3-seriate. Spores monolete, smooth to rough, translucent or darkened.

Key modified ex Copeland 1929, J. Arn. Arbor. 10: 181s, (as Cyclophorus).

Species in Papuasia

1a.

Fronds commonly 30 cm or more long 2
Fronds smaller 4
2a. Main lateral veins conspicuous 3
Main lateral veins invisible P. longifolia
3a. Stellate scales on frond with a central spine P. splendens
Stellate scales on frond lacking a central spine P. princeps
4a. Sori in one row either side of costa 5
Sori sori numerious, in several rows 6
5a. Sori immersed P. lauterbachii
Sori superficial P. confluens
6a. Fronds uniform P. macropodus
Fronds dimorphous but equally long P. ledermannii
6c. Sterile fronds shorter than fertile 7
7a. Sterile fronds subsessile P. dispar
Sterile fronds stipitate 8
8a. Sterile fronds acute, c. 10 cm long P. bamleri
Sterile fronds obtuse, usually smaller 9
9a. Upper surface of lamina stellate 10
Upper surface of lamina glabrescent 11
10a. Sterile fronds under 1 cm wide P. stellatus
Sterile fronds larger P. dimorphus
11a. Sori c. 1 mm broad P. pachycermis
Sori small P. adnascens

Also: P. varia; P. foveolata; P. brassii

Drymoglossum Presl.

Small climbing epiphytes. Rhizome long-creeping, densely clothed with +/- elongate, dark-centred, peltate scales, dictyostelic, with a sclerotic medullary strand. Fronds shortly to moderately stipitate, the stipe articulate to phyllopodia, +/- winged at least upwards, with 2-3 fibro-vascular bundles, lamina simple, entire, leathery, +/- persistently stellate-hairy (at least when young) at least on the abaxial surface, strongly dimorphic, the sterile fronds orbicular to lanceolate or oblong, costa +/- prominent, veins obscure, forming a series of oblique, parellel areoles, with or without excurrent, simple or branched, free included veinlets, hydathodes sometimes present, the fertile fronds longer and stronger contracted to almost linear with very little lamina uncovered by sporangia. Sporangia in a continuous linear coenosorus either side of the costa, served by a supplimentary vascular system, exindusiate, protected when young by stellate paraphyses, annulus longitudinal, interrupted, of 14-18 thickened cells, pedicel long, 3-seriate. Spores monolete, coarsely tuberculate.

D. fallax

D. piloselloides

D. novoguineensis