4 FERNS OF NORTH-WEST MADAGASCAR. 
ApIAN var. CRENATUM, 0. var. er deeply 
-erenate all round the “fertile Saas margin, with a sorus with a very 
reniform indusium at the bottom of each tidentution Of this very 
distinct species two forms are already known, the type in Madeira 
and Teneriffe, 4. CH beta noes in Mauritius and Bourbon; 
this is a third from Madaga 
Pieris sata Re Sterile frond 8-lobed, not more than 
4-3 in. Jae an 
52*. Pteris y Darren cordifolia, n. sp.  Tuf ted. « Stipe 
of mecle frond 8-4 in. long, naked, glossy, brown-black. Sterile 
frond simple, Sentateaiate: “shabeedak. bright green and glabrous 
on both surfaces, 4-5 in. long, deltoid at the apex with broadly- 
rounded basal lobes. Veins distinct, erecto-patent, anastomosing 
copiously in narrow areole without any free included veinlets. 
Fertile frond with a longer stipe and hastate lamina with three 
lanceolate lobes, the end one ne largest, the two basal ones more 
or less divaricating. Sorus broad, continuous. Indusium narrow, 
arses —A very distinet eee. allied to the Brazilian P. 
magic ole Raddi. 
P. laurea Desv.? Texture more rigid than in the type, and 
Lomaria attenuata Willd. var. diversifolia, 
20*. Asplenium (Evasprentum) longisorum, n. sp. Root- 
stock slender, ERS -creeping ; basal paler lanceolate, nearly black. 
Stipes contiguous, nearly black, wiry, naked, reaching a length of 
nearly a foot. Frond ovate-acuminate, 5-6 in. long, entire or 
furnished with two lateral enebe, broadly rounded at the base, sub- 
coriaceous, bright green, glabrous idrib distinct a towards 
the base o the frond ; veins fine, close, flabellate Sori 
narrow, running along the veins up to a short space fro: ats edge. 
Indusium very narrow, glabrous. — Allied to A. Flemionisis L. 
50*. Asplenium ( aha peg Rs pachysorum, n.sp. Root- 
stoc! seen. par slender, fragile, 
oblone lent? imply pinnate, moderately firm in texture, green 
h 
se at its tip. Side pinne 1-5-jugate, lanceolate, sessile, 
acuminate, obscurely crenulate, 4—6 in. long, about an inch broad, 
nearly equal at the base. Veins aa ‘ascending, simple or forked. 
Sori stout, running along the veins from the cap nearly to the 
edge. Indus m narrow, persistent, glabrous. — Closely allied to 
West tcc 3 longicauda Hook., and A. emar; ee Beauv. 
A, anisophyllum Kaulf. 
- cuneatum 
A, (Athyrium) nigripes Blume, var. dissectum Moore. 
Ne redone subquinguefidum Hook. 
155*. Nephrodium (Lasrrea) granulosum, n. sp. Frond 
large, ‘membranous, deltoid, decompound, green on both sides, 
hairy only on main rachises above, finely pubescent and granular all 
