﻿174 21. PLEOCNEMIA. 



Slipes 50 — 60 c.M. long, brown, glossy. Fronds 30 — 60 c.M. long, broadly 

 deltoid, with a pinnatifid apex and + 4 — 5 pairs of pinnae on each side, the 

 higher ones decurrent, the lower stalked. Lowest pinnae largest, deltoid, 

 the pinnulae on the lower side prolonged, deeply pinnatifid; highest pinnae 

 bluntly lobcd. Texture moderately firm; surfaces nearly naked; veins anasto- 

 mosing al least near the costae. Indusium subcordate. — A plant, gathered 

 in Borneo and cultivated in the Buitenzorg gardens, which may be a form of 

 this species has the fronds under 50 c.M. long, the ultimate lobes linear, gra- 

 dually narrowed towards the apex, entire or broadly toothed and the sori 

 submarginal. 



Philippines, ? Borneo. 



* (8) I*. deveuLa, ». A. v. R.; P. membranacea, Bedd., Handb. Ind. 

 Ferns, 225; Aspidium membranaceum, Hk., Hk. Bk., Syii. Fil., '^^9; A. devexwti, 

 Kze., (oldest name), Bot. Zeit., d848, 259; C. Chr., Ind Fil.; — var minor; 

 A. giganteum, BL, var. minor, Hk., Spec. Fil., IV, 50; Sagenia gigantea, Bedd., 

 var minor., Bedd., Ferns S.I., tab. CCXLIII. 



Stipes tufted, to about 30 c.M. long, nearly naked, with a few spreading, 

 linear scales below. Fronds to 45 — 60 c.M. long^ ± 50 c.M. or more broad. 

 Lower pinnae much the largest, subdeltoid, 15 — 20 c.M. long, 7 — 10 c.M. broad. 

 Pinnulae on lowest side much larger than the others, pinnatifid (pinnate 

 at the base) with lanceolate, pinnatifid segments, with small, oblong, sinuated 

 lobes. Texture thinly herbaceous ; colour pale-green; veins anastomosing prin- 

 cipallv in costal arches, but sometimes also as in Aspidium. Sori copious, 

 terminal on the veins or veinlels ; indusium peltate. 



tar. minor: A less divided form; pinnae pinnatifid, the lowest 

 ones pinnate at the base; pinnulae pinnalifid, the edges of the lobes entire 

 or ± slightly lobed. 



Malaya ; Formosa, South. China, Ceylon. 



2'^. I>IiYOJPTER,lS, Adanson. 



Sori roundish, commonly ± medial on the veins. Indusium reniform, 

 attached by the sinus, rarely peltate and round or cordate. 



Bhizome creeping or erect. Stipes not articulate to the rhizome. Fronds 

 commonly pinnate or sometimes more compoundly divided; veins free or the 

 lower ones of adjacent groups anastomosing and then forming on each side 

 of the midribs 1 row of regulai*, deltoid, costal areolae with an excurrenl 



