﻿520 60a. DICTYOPTERIS. § 1. ARCYPTERIS. 



long, dark-brown at the base, which is clothed with linear scales, the rest 

 naked, stramineous. Fronds 30 — 43 c.M. long, deltoid, acnmiaate, pinnate, 

 the apex pinnatifid with broadly crenate and obscurely serrate lobes. Pinnae 

 + 6 on each side, erecto-patent, lanceolate, acuminate, cut ± ^j^-^scy down 

 to the costa into oblong, obtuse, entire or serrate lobes; lowest pinnae stalk- 

 ed, deltoid, with a free, basal pinnula on the lower side resembling one of 

 the upper pinnae. Texture papyraceous; surfaces naked; veins laxly anasto- 

 mosing, without free veinlets. Sori round or oblong, irregularly scattered 

 but wanting near the costae. 

 Luzon. 



(17) I>. polycarpa, Bedd., Handb. Ind. Ferns, 300; Phegopteris; 

 polycarpa, Mett., Linn., XXXVI, 124; Polypodium polycarpum, Bk., Hk. Bk., 

 Syn. Fil., 506; Aspidium Kuhnii, C. Chr., Ind. Fil. 



Stipes ± 13 c.M. long, rubro-stramineous, slightly pilose upwards. Fronds 

 deltoid, 2-pinnatifid, 15 — 45 c.M. long. Pinnae 6-jugate, lowest largest, del- 

 toid, unequal-sided, stalked, 3-partite, central ligulate, acuminate, crenate. Tex- 

 ture membranaceous; surfaces glabrous; main veins distinct to the edge; are- 

 olae with free veinlets. Sori copiously scattered, terminal or compital. 



Malacca. 



* (18) O. irregularis, J»r., Tent. Pterid., 194, tab. VIII, fig. 7; 

 Bedd., Ferns Br.I., I, tab. LXXVII; D. difformis, Moore, Bedd., Handb. Ind. 

 Ferns, 300 ; Phegopteris difformis, Mett., Christ, Farnkr. d. Erde, 267, fig. 843 ; 

 Ph. irregularis, Mett., Ann. Mus. Bot. L. B., I, 225; Aspidium difforme, BL, 

 Enum., 160; A. irregulare, C. Chr., Ind. Fil.; Polypodium difforme, BL, Rac, 

 Flor. Btz., I, 118; Tectaria irregularis, Copel., Philipp. Journ., II, 416, p. p.; 

 P. irregulare, Pr. (oldest name), BL, Flor. Jav, II, tab. LXXII; — var. eu-irre- 

 gularis, Copel., 1. c. 



Rhizome erect or ascending, densely clothed with lanceolate, very long- 

 acuminate, brown scales. Stipes tufted, + 50 —50 c.M. long, erect, scaly 

 below. Fronds 50 — 200 c.M. long, the apex pinnatifid with the lobes crenate 

 or subrepand. Upper pinnae lanceolate, broadly crenate or lobed, the lobes 

 blunt, falcate, reaching ± '/4 — Va'^^Y ^own to the costa; lower pinnae 

 stalked, often deltoid, to ± 30 c.M. long, pinnatifid often more than Va'^ay 

 down, the lowest forked at the base on the lower side with the fork branch 

 deflexed and sometimes free, to 12 — 15 c.M. long. Texture subcoriaceous ; 

 surfaces naked; areolae copious, with few free veinlets. Sori very abundant. 



