ADIANTUM. 13 



brown only a little chaffy, the rest as well as the rachis gla- 

 brous very glossy. (Tab, LXXX. A.). — Sw. Si/n. Fit. p. 

 422 Sf 320. lyUld. Sp. PL 5, p. 433. A. caudatum, nory, 

 Itin. i, p. 198 {not Linn.).—0. major; a foot to a foot and a 

 half long. 



Hab. Moist rocks aud wooded hills, Mauritius and Bourlion, Bon/, 

 Carmic/utel, Sieber, ii. 300, BoiUon, Bnjer, Gardner, ^-c. — jS. Moun- 

 tain at St. Denis, Bourbon (Herb, nostr. from the Musoiini of Nat. 

 Hist, of Paris). — Difficult as this species may be to define in a few 

 words, it is, however, truly distinct from A. caudaliun, not only in 

 being everywhere glabrous, but in the colour and texture of the pin- 

 nules, which are firm and almost coriaceous, and in the veins, which are 

 here so delicate as to be seen only like fine and closely packed lines 

 or striae on the surface. I possess copious specimens from Mauritius 

 and some from Bourbon, aud perhaps it is confined to those islands. I 

 have one individual of the true plant indeed from Dr. Wight, without any 

 locality, labelled " A.rhizophorum; specimens, I think, of this are mixed 

 among the A. caudatum,'^ and my friend Dr. Arnott has added "Wight, 

 Cat. 130 d (parlim),'' but no such plant is there. In size it is usually 

 smaller than A. caudatum ; but my Bourbon specimens from the Paris 

 herbarium are larger than any caudatum, yet exhibiting all the characters 

 of A. rhizophorum. 



25. A. soboli/erum, Wall. ; everywhere glabrous fronds (a 

 foot high often soboliferous, WalL) broadly lanceolate pin- 

 nated, pinna; submombranaceous sessile or lower ones only 

 on very short petioles semielliptical slightly falcate obtuse 

 the upper base truncated and parallel with the rachis upper 

 margin rather equally lobed, sterile ones denticulate, lobes 

 soriferous, sori subreniform, stipes ebeneous, rachis and stipes 

 with a membranous margin on each side ! (Tab. LXXIV. A.). 



Hab. Mountains of Ava, Dr. WalUch, 182(3. — Although my own speci- 

 mens from the generous Wallich do not exhibit the radicant and stoloni- 

 ferous character which suggested the name, it is quite natural that the species 

 should be occasionally so, its nearest affinity being with A. caudatum, 

 from which it is at once distinguished by its entirely glabrous fronds and 

 stipes, and from that and all others by the decided membranaceous wing 

 on both sides the rachis and stipes, most apparent, indeed, in the sterile 

 specimens, but existing in all. 



26. A. caudatum, L. ; fronds linear-oblong elongated at- 

 tenuated often rooting at the apex and there bare of pinna;, 

 pinna; nearly sessile alternate rather thick membranaceous 

 dimidiato-oblong the upper base truncated and parallel with 

 the rachis the upper margin more or less deeply lobed, the 

 lobes often bifid soriferous villous in every part with rufous 

 hairs or more or less glabrous, veins generally prominent, in- 

 volucres nearly orbicular or subquadratc hairy or glabrous, 

 stipes generally short rather stout and as well as llie rachis 



