Acrostichum. J 
FILICES. 
511 
gradually to the base or a very short stipe. Veins immersed, quite 
invisible. Fertile frond shorter, with a stipe 2-3 in. long. 
Seychelles, not uncommon in Mahe and Silhouette, Horne , 676 ! Also Tropical 
America, Guinea, and perhaps Madagascar. 
2. A. conforme, Sw.j Hook and Baker, Syn. Fil. 401. Rootstock 
thick, woody, short-creeping ; scales large, brown, lanceolate. Sterile 
frond lanceolate or oblong-lanceolate, 4-6 in. long, 1-2 in. broad at the 
middle, acute, deltoid at the base, rigidly coriaceous, naked, with a naked 
straw-coloured stipe 1-3 in. long. Veins fine, close, rather ascending, 
usually forked. Fertile frond smaller, with a longer stipe. A. macro- 
podium, Fee , Acrost. 30, tab. vi. jig. 2. A. ovalifolium, Bojer, Hort. 
Maur. 414. 
Var. Carmichaelii, Baker. Sterile frond lanceolate, 8-9 in. long, 
1\ in. broad, narrowed gradually to both ends, with a stipe 1J-2 in. 
long. Fertile frond smaller, on a stipe 3-8 in. long, scaly near the base. 
Mauritius and Seychelles, in woods ; the variety, which recedes from the type 
towards A . latifolium, gathered in Mauritius by Captain Carmichael. Tropical and 
warm temperate zones of both hemispheres. 
3. A. latifolium, Sw. ; Hook . and Baker , Syn. Fil. 403. Root- 
stock thick, woody, short-creeping ; scales dense, lanceolate, bright 
brown. Sterile frond lanceolate or oblong-lanceolate, 6-12 in. long, 
1J-3 in. broad at the middle, naked, rigidly coriaceous, acute, deltoid 
at the base, with a naked straw-coloured stipe 3-6 in. long. Veins 
fine, close, rather ascending, usually forked. Fertile frond narrower, 
on a stipe of about equal length. A. callsefolium, Blume. 
Seychelles, in the woods of Mahe, Ward! Horne , 172/ Warmer zones of both 
hemispheres. 
» 
4. A. Sieberi, Hook, and Grev. ; Hook, and Baker , Syn. Fil. 403. 
Rootstock thick, woody, short-creeping ; scales dense, linear-subulate, 
dark brown. Sterile frond lanceolate or oblong-lanceolate, 8-12 in. long, 
l|-3 in. broad at the middle, naked, rigidly coriaceous, acute, cuneate 
at the base, with a naked stipe 4-5 in. long. Veins fine, close, ascend- 
ing, usually forked. Fertile frond narrower, on a longer stipe. A. 
ellipticum, Fee , Acrost. 30, t. 4. 
Mauritius, in the woods of the Black River, etc. Also Bourbon. 
5 A. hybridum, Bory ; Hook, and Baker , Syn. Fil. 403. Rootstock 
thick, woody, short-creeping ; scales dense, linear, dark bright brown. 
Sterile frond lanceolate, subcoriaceous, with a few spreading linear 
scales on the edges and midrib beneath, 6-9 in. long, 1J-2 in. broad, 
acute, deltoid or rather rounded at the base, with a straw-coloured 
stipe 3-6 in. long, furnished with a few spreading deciduous scales. 
