10. P. effusuam, Sm.; Hort. Kew. 
11. P. alpestre, Spreng. . Aspidium? alpestre, Hoppe. Schk. Crypt. t. 60, 
_p..58. (excluding syn. Jann. and Sm.) 
Has, Switzerland. tivated at Kew since 1823. 
Oss. Polypodium Rheticum of Linnzus is cited by Schkuhr 
as synonymous with this species, but this is an error, for, on ex- 
amining the Linnzan specimen, I find it to be, as already stated 
by Sir James Smith, only a fragment of:an imperfect or young 
state of Asplenium filix-feemina; consequently Polypodium Rhe- 
ticum can no longer be retained as a species. 
**** Fronds in vernation terminal, adherent, forming an erect, 
caudiciform rhizoma. \ 
12. P. lachnopodium, xov. spec.; fronds deltoid bi-tripimnatifid, rachis 
and midrib paleaceous, pinnules lanceolato-acuminate, segments ob- 
long-linear obtuse villous, the lower ones distant and pinnatifid, the 
superior ones dentate and becoming entire towards the apex, veins 
_ pinnately forked, sori medial uniserial. 
Has. Jamaica. Introduced by Mr. William Purdie, in 1843. Stipes 
densely furnished at the base with long, criniform, brown palee. Fronds, 
including the stipes, three feet or more in length, pinne one foot ; pmnules 
two to four inches, petiolate, the upper ones sessile. 
3. Hyroneris, Bernh.; J. Sm. 
1. Ba Tula J. Sm.  Polypodium rugulosum,; Ladil/. Nov. Foll. vol. ii. 
t. 241. 
‘Haz. Van Diemen’s Land. Introduced in 1844, by R. Gunn, Esq. 
2. H. repens, Pres/. Lonchites repens, Linn.; Plum. Fil. t.12. Cheil- 
anthes repens, Kau//. : 
Has. West Indies. Raised in 1828. __ 
3. H. aculeata, J. Sm. Cheilanthes aculeata,. Kau/f. 
Has. Jamaica and other West India Islands.. Received in 1841 from 
the Royal Botanic Garden of Berl, i 
Oss. ‘This genus has hitherto been placed in the tribe Pferi- 
dee, but the habit of the species on which the genus is founded, 
so much at yariance with the whole.of Pteride@, has induced me 
to reconsider the affinities. I have already (Gen. Fil.) noticed 
the similarity in habit to some large, decompound-fronded_spe- 
cies of Polypodium, differing from them only in the soriferous 
crenules bemg altered and reflexed, forming a lateral indusium 
with the sporangia in its axis.» It now appears to me that the 
reflexed crenule cannot be considered ‘otherwise than analo- 
gous to the reflexed and changed margin of Sfruthiopteris and 
