﻿71. POLYPODIUM. § 6. PLEOPELTIS. b**. PLEURIDIUM. 651 



triquetrum, BL, var., C. Chr., Ind. Fil, ; Pleopeltis rupestris, Moore, Bedd., 

 Handb. Ind. Ferns, Suppl., 94; — var. taeniopsis; P. taeniopsis., Christ, Fil. 

 Saras., IV, 445; P. (riquelrum, BL, var. taeniopsis, Christ, Ann. Btz., XV, 157, 

 tab. XVI, fig. 24, a — d; — var. leucolepis, Rst., Fed., Rep., V, 43. 



Rhizome long, woody; scales dull-brown, rather small, narrow, elon- 

 gate-lanceolate, rounded or cordate at the base, the edge slightly denticulate, 

 the apex spreading, acuminate, at length deciduous. Stipes scattered, firm, 

 erect, naked, glossy, 5 — 25 c.M. long. Fronds 10—20 c.M. long, 1 — 5 c.M. 

 broad, lanceolate, acuminate, entire or repand, the edge callous, recurved, the 

 base cuneate or rounded. Texture coriaceous; surfaces naked, the upper side 

 covered with minute, indistinct, scattered black dots; costa keeled beneath; 

 main veins distinct. Fertile fronds similar to the barren ones or longer and 

 narrower. Sori superficial, in 2 rows between the main veins, 4 — 8 in a row. 



"W^ar. taeiaiopisiis : Rhizome scales ferrugineous ; stipes distant, soli- 

 tary or in pairs, ± 3 c.M. long ; fertile fronds linear or linear-lanceolate, 4 — 

 10 m.M. broad, narrowed gradually towards both ends; main veins not very 

 distinct; sori in 1 row on each side, or in 2 irregular rows but then rather 

 marginal. 



^ar. leucolepiii: Rhizome scales white, narrower, minutely ciliato- 

 dentate; stipes slender; texture chartaceous; areolae more conspicuous. 



Malaya; — var. taeniopsis; Celebes; — var. leucolepis: Newj Guinea. 



(1816) P. luzonicum, Copel.^ Philipp. Journ., I, Suppl., 162, tab. 

 XXIII. 



Rhizome scandent, clothed with black-brown, lanceolate, long-acuminate, 

 minutely ciliate scales. Stipes 1 — 5 c.M. long, stramineous, clothed with de- 

 ciduous, brown scales. Fronds lanceolate or oblanceolate, 20 — 30 c.M. long, 

 to 4 c.M. broad, entire, acuminate, the base narrowed gradually into the stipe. 

 Texture subcoriaceous ; surfaces naked ; main veins distinct nearly to the ed- 

 ge; areolae hidden. Sori large, in 2 rows between the main veins, forming 

 1 — 3 rows on each side of the costa, superficial. 



Luzon. 



(182) P. albiilum, Christ, C. Chr., Ind. Fil. ; P. lagopodioides, Christ, 

 Ann. Btz., XIX, 37. 



Like P. rupestre, Bl. but smaller; fronds narrower, the point finer; scales 

 of the rhizome yellowish-white, papyraceous, lanceolate, aristate. 



Celebes. 



