174 



21. PLEOCNEMIA. 



Slipos 50 — 60 c.M. long^ brown, glossy. Fronde 50 — 60 o.M. long, brooj 



deltoid, with a pinnatifid apex and + 4 — 5 pairs of pinnae on eagt-sfSe, the 

 higher ones decurrent, the lower stalked. Lowest piimae-'Iargest, deltoid, 

 the pinnulae on the lower side prolonged, deeph>pilinatifid ; highest pinnae 

 bluntly lohud. Texture moderately firm; sjjrfa^ nearly naked: veins anasto- 

 mosing at least near, the costae. IjjdtfSium subcordate. — A plant, gathered 

 in Borneo and cultivated inihtfBuitenzorg gardens, wliich may he a form of 

 this species has the|«jfi3s under 50 c.M. long, the ultimate lobes linear, gra- 

 dually narmspeutowards the apex, entire or broadly toothed and the- sori 

 subiQai^!^. 



PhUippiiica, ? Borneo. 



* (8) p. devexa, «. A. v. JC,- P. membranacea, Bedd., Handb. Ind. 

 Ferns, 225; Aspidium membranaceum, Hk., Hk. Bk., Syn. Fil., '^69; A.devexum, 

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

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

 var minor., Bedd., Ferns S.I., tab. CCXLIII. See the Appendix. 



Stipe s tuftod, to about 50 cJI. long, nearly naked, with a few aprcadif 



linear scales below. Fronds to 45 — 60 c.M. long, + 50 c.M. or mpp^^'oad. 

 Lower pinnae much the largest, subdeltoid, 15 — 20 c.M. longj,>'=^ c.M. broail. 

 Pinnulae on lowest side much larger than the olljarS; pinnatifid (pinnate 

 at the base) with lanceolate, pinnatifid segmenj>5'^th small, oblong, sinuated 

 lobes. Texture thinly herbaceous ; colojy>^f5fle-green; veins anastomosing prin- 

 cipally in costal arches, but spsa^umes also as in Aspidium. Sori copious, 

 terminal on the veins or^yeitilels ; indusium peltate. 



lar. luimM^A less divided form; pinnae pinnatifid, the lowest 

 ones pinnaj,©-'^ the base; pinnulae jinnalifid, the edges of the lobes entire 

 or :;fc''glTghtly lobed. 



Malaya ; Formosaj SoiUh. China, Ceylon^ — 



S3. DIS-YOfTEItlS, 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 regular, deltoid, costal areolae with an excurrent 



