Hartwegiane. N. O. Filices. 
TABS. CCCLXXXVII. CCCLXXXVIIL 
ALLosorus Karwinskit, 
Fronde supradecomposita, pinnis alternis petiolulatis sterilibus 
ovatis ovato-oblongisve obtusiusculis serrulatis basi truncatis 
terminali subinzequali, fertilibus copiose paniculatis in apice 
frondis linearibus acuminatis. 
Allosorus Karwinskii. Kunze in Linnea, v. 13. p. 138. Benth. Pl. 
Hartweg, p. 54. 
Ceratodactylis osmundioides. J. Smith in Bauer et Hook, Gen. 
Fil, ¢. 
Haz. Mexico, Oaxaca; Karwinski. Barranca del Encarna- 
cion, near Zimapan; Hartweg. 
One of the most striking of Ferns that has recently been made 
known. Our specimens are from Mr Hartweg, of whose dis- 
__ tributed collections it is No. 411. We gave the following brief 
_ Notice of it in Mr Bentham’s invaluable notes on Hartweg’s 
 Plants:—« Mr Lambert is probably the first botanist to whom 
this very remarkable plant was known. Mr John Smith con- 
_ Siders it the type of a new genus, and has described it as such 
in the Genera Filicum ; but I fear it cannot be separated from 
that division of the old genus Allosorus, to which Presl has re- 
ferred it, and it does seem to connect Cryptogramma, Br. with 
us, much more so than I had any idea of till I saw this 
“Noble species. As in Osmunda, the upper part of the frond is 
“ohverted, as it were, into a panicle of fructification.” 
2 Fig..\. Portion of a fertile pinnule. f. 2. Small portion of 
G0., the margin laid open to show the sori on the nerves. fi 3. 
* Sporangia. f. 5. Sporules :—magnyfied. 
