252 23. MESOCHLAENA. 



Rhizome short, + erect. Stipes not articulate to the rhizome. Fronds 

 large, 2-pinnatifid ; veins anastomosing as in Nephrodium. Diels, in Engl. 

 & Prantl, Nat. Pfl.Fam., I*, fig. 94j^ Christ, Farnkr. d. Erde, fig. 793. 



Malaya, Polynesia. 



^, Pinnae i\ — 2 c.M. broad, cut to ^j^-voay down to the costa. (1) M. polycarpa. 

 :tc.>(c. Pinnae 3 — 5 c.M. broad, cut to ^|^-vuay doivn to the casta. (2) M. larutensis. 



* (1) 11. polycarpa, Bedd., Handb. Ind. Ferns, 199; M. javanica, 

 R. Br., Bedd., Ferns Br.I., II, tab. CCCXLIV; Didymochlaena polycarpa, Bk., 

 Rac, Flor. Btz., I, 197; Nephrodium javanicum, Hk., Fil. Exot., tab. LXII; 

 Aspidium polycarpum, Bl., Christ, Farnkr. d. Erde, 249; Sphamostephanos as- 

 plenioides, J. Sm., Ban. & Hk., Gen. Fil., tab. XXIY. 



Rhizome erect, densely clothed with lineai'-lanceolate, ciliate scales. Stipes 

 tufted. Fronds 60 — 200 c.M. long, pinnate, acuminate. Pinnae spreading, 

 close, linear-lanceolate, gradually narrowing from the + truncate base towards 

 the acuminate apex, the largest 15 — 2S c.M. long, 1*4 — 2 c.M. broad, the 

 edge cut down to '/j'^^Y <*'" ^ore to the costa into close, bluntish, oblong 

 lobes, lower pinnae reduced into several or numerous mere auricles oc- 

 cupying the largest part of the stipe. Texture herbaceous; rachis and 

 surfaces hairy; main veins pinnate in the lobes; veins numerous, close, the 

 2 — 3 lower anastomosing. Sori numerous, medial on the veins, ultimately 

 confluent; indusium villose and glandular. 



Malaya; Polynesia. 



* (2) 11. larutensis, r. A. r. «.,• Nephrodium larufense, Bedd., Handb. 

 Ind. Ferns, Suppl., 75; Dryopteris larutensis, C. Chr., Ind. Fil.; — var. bor- 

 neensis. 



Stipes 20^30 c.3I. long, furnished with very regular auricles (reduced 

 pinnae) below the pinnae, densely villous with' short hairs^as in the rachis. 

 Fronds 60—90 c.M. long. Pinnae 23 — 30 c.M. long. 5—5 c.3I. broad, finely 

 acuminate at the apex, cut down + ^4 towards the costa into short, sub- 

 falcate lobes, the base truncate or broadly cuneate. Texture herbaceous or 

 subcoriaceous ; upper surface hairy on the costae, veins and parenchyma, 

 under surface hairy on the costae and veins, the lamina fui'nished with minute 

 resinous dots; veins + 10 pairs, ascending, the 5 — 6 lower pairs anasto- 

 mosing. Sori medial; indusium hairy. . 



