TAB. C. 
HeMITELIA (AjIPHICOSMIA) PLATYLEPIS, TIook. 
Stipite elongato castaneo nitido versus, basin crassitie digitis 
lnimani, squamis maximis ovatis nitidissimis acuminatis 
atro-fuscis margine pallidioribus suberosis basi s.quamulosis 
paleaceis, frondtbus amplissimis subeoriaceis ubique hirsu- 
tulis tripmnatis, pinnis primariis inferioribus louge petiolatis 
pedalibus sesquipedalibus ovato-oblongis, secundariis sessi- 
libus oblongo-lanceolatis acuminatis, pinnulis 3-4 lineas 
lono-is lineanbus acutis marginibus recurvatis serratis, venis 
furcatis ad furcaturam unisoris, racbibus adpresse villosis 
ultimis alatis, involucro exacte hemisphmrico membranaceo 
maro-ine ereoso-denticulato, receptaculo elevato, capsulis 
pilis articulatis intermixtis. 
Hab. Near San Carlos, Rio Negro, tributary of the Amazon, 
Brazil, R. Spruce, n. 3027. 
This is a Hemitelia, according to our views of the Genus, 
but would be an Amphicosmia of the late Mr. Gardner,. Lond. 
Journ. of Bot. 1, p. 441 ; differing from Hemitelia in its free 
venation. The involucre is exactly the same as in our H. Host- 
manni and H. Parheri, described in the “ Species Filicum,” and 
fio-ured in the 7th volume of our “ leones Plantarum.” It is 
probably nearly allied to Cyatlica multifiora ol Sir J. E. Smith, 
which has the “ rachis winged,” and which Gardner refers to 
Amphicosmia : but I have never seen an authentic specimen, 
which I believe only exists in the Banksian Herbarium, and 
which is stated to be a native of Jamaica. In general the 
specimens we receive of these gigantic Ferns are too imperfect 
for accurate description, even the stipes is often neglected, 
which not unfrequently affords good characters in the pecu- 
liarities of its clothing especially, as is remarkably the case 
in the species now under consideration ; and, the involucre 
being very fragile, is too frequently injured, and leads one 
astray in regard to the Genus. 
Tab. C. Fig. 1. Base of the stipes of Hemitelia (Amphi- 
cosmiu) platylepis , IIoolc., with its remarkable large scales 
and the squamules at their point of insertion ; and f 2. 
portions of a primary pinna of a fertile frond ; natural size, 
f. 3. Under side of a barren pinnule, with a portion of the 
winged rachis; magnified, f. 5. Portion of a fertile pinnule, 
with a sorus; f. 6. involucre and receptacle from which 
most of the capsules have fallen ; and f. 7. capsules with 
accompanying hairs ; more magnified. 
Cent, 2. t. 100, 
