Tas. 4698. 
ALLOSORUS corpatus. 
Heart-leaved Allosorus. 
Nat. Ord. Fitices.—CryptTg@amia FILiczs. 
Gen. Char. Sori marginales, primum subrotundi discreti, citissime confluentes 
et tum lineares continui, margine frondis crenato-plicato revoluto et indusio ob- 
tecti. Jndusium marginarium, lineare, continuum, membranaceo-scariosum, pla- 
num aut plicatum. Capsule sessiles v. subsessiles—Rhizoma subglobosum aut 
repens. Frondes fasciculate aut sparse, coriacee aut herbacee, pinnatim compo- 
site et supradecomposite, fertiles pinnulis laciniisque multo angustioribus. Ven 
pinnate, creberrime, interna, tenuissine, uni-bi-tri-quadrifurcate, venulis parallelis 
apice clavulato libero terminatis. Species plurime intratropice, pauciores extra- 
tropice. Presl. 
AtLosorus cordatus; caudice repente pallide paleaceo, fronde ovato-oblonga 
coriacea bipinnata rarius inferne tripinnata, pinnulis brevissime petiolulatis 
cordato-ovatis obtusis distincte venosis glanduloso-pubescentibus, stipite 
paleaceo rachibusque strictiusculis stramineis rachi communi valida. 
AuLosorus cordatus. Pres, Tent. Pterid. p. 153. Kunze, in Linnea, v. 13. 
p. 135. 
Preris cordata. Cavan. Pral. 1801. 2. 662. Sw. Syn. Fil. p.106. Willd. Sp. 
Pl. 0.5. p.392. Presl, Relig. Hank. v.1. p.57. H, B.K. Nov. Gen. Am. 
v. 1. p. 15. 
PLATYLOMA cordata. J. Sm. in Bot. Mag. Comp. p. 21. 
Prtuea, Me (but not his P. cordata, which is a Cape plant of Sieber). 
With the figures and descriptions we propose from time to 
time to give of the Ferns, which are now such general favourites 
with cultivators, and so beautiful in their form and structure, it 
is not our interttion to discuss the merits or otherwise of the se- 
veral opinions that prevail respecting the limits of genera. Almost 
every writer on Ferns entertains his own peculiar views on this 
subject, and there is, with the more recent writers at least, a ten- 
dency ‘to multiply genera on the ground of the slightest dif- 
ferences in the fructification or venation. Our object here will — 
rather be to take a middle course ; and our opinion has long been _ ; 
recorded that Presl’s system, as given in his ‘'Tentamen Pterido- 
graphia,’ is the best yet given, and that which is most generally 
FEBRUARY Ist, 1853. 
