NEPHRODIUM, § LASTREA. 149 



Hal). Rio Uaupcs.a tributary to the Amazon, Spruce (" gregaria cwspitosa, stipes 

 3-pedalis et ultra ; frons bipedalis"). — This new species is justly entitled to rank 

 among the polystichoid Nephrodia, and is readily distinguished from A', exciti- 

 tutn by the smaller ultimate i)innules, their muticous teeth, and, above all, the 

 very large size and colour of the involucres, which are depressed near tiie centre 

 and have the margin waved. 



150. N. (Lastrea) plaii/jms, Hook.; " caudex V, stipes in 

 the u[)per part terete testaceous glabrous slender, frond 1 .', 

 foot long thin-coriaceous glossy subdeltoideo-ovate acuminate 

 bipinnate tripinnate below, primary pinnae 6-10 inches long 

 petiolate, superior ones ovato-oblong acuminate subfalcate, 

 basal ones the longest and bii)innate, pinnro and ultimate 

 pinnules all obliquely ovate acuminate at tiie base, superior 

 base auricled the rest subj)innatitid with pungent and ser- 

 rated lobes, veinlets twice or thrice forked, .sori in two series 

 halfway between the costule and the margin, involucre large 

 convex cordato-reniform membranaceous finely fimbriated on 

 a short stipes." Aspidium, Kze. Bot. Zclt. vi. p. 2G2. Met- 

 ten. Aspid. p. 69. 



Hah. Java, " Zollinger, n. 3845." Mountains, Moulmein, alt. 5000 feet, T/ios. 

 Lobb. — The general aspect of this Fernis that of ^s/;wi. (Polystichum) aristatum, 

 hut the frond is more compound and the sori are never near the margin. The only 

 specimen I have seen possesses neither caudex nor the entire stipes, but the frond 

 and fructification are very perfect. 1 need hardly say it has no close affinity with 

 any known Nephrodium. 



151. N. (Lastrea) excuJtum, Hook.; caudex short thick, 

 "stipes \h foot long laxly paleaceous glandulosely hirsute 

 above, frond subcoriaceous 1 h foot long bright-green gla- 

 brous above beneath sprinkled with minute cylindrical sub- 

 glandulose hairs ovate acuminate, proliferous below the apex, 

 tripinnate, primary segments distant suberecto-patent curved 

 upwards, lowest ones 8 inches long petiolate unequally ovate 

 acuminate the prolonged apex sharply serrated, secondary 

 pinnie rectangularly patent, lower ones petiolate ovate acu- 

 minate superior ones tapering and adnate at the base from 

 the inferior cuneate base the superior truncate and broader 

 oblong acutely attenuate at the apex, basal ones of the in- 

 ferior side very large, tertiary pinnules approximate coadunate 

 ovate or oblong submucronate, lowest ones pinnatipartite, 

 superior ones inciso-serrate, segments subfakate acute, 

 branches of the veins uruUvided soriterous, sori between the 

 costule and margin, involucre rotundato-reniform black in 

 thd middle, the nuu-gm brown coriaceous glabrous persistent." 



