Purdieane. N. O. Filices. 
DCCCCXX XVIII. . 
ASPLENIUM (Hemidictyon) Purpreanum, Hook. 
Frondibus subcoriaceis opacis cordato-rotundatis pinnatis, 
pinnis 5-7 patentibus submembranaceis lateralibus oppositis 
subsessilibus ovato-lanceolatis breviter acuminatis basi ob- 
lique cuneatis deorsum obtuse productis obtusangulis (seu 
pinnis inequilateris), terminali subrhombeo-ovata acuminata 
equilatera nunc subhastata lobis inequalibus, venis mar- 
ginem versus anastomosantibus, stipite rachique compressis 
subulatis fusco-paleaceis, radice fibrosa. 
Has. Moist woods, La Fundacion, Jamaica, Purdie. 
This appears to be an entirely undescribed Fern of peculiar 
habit, haying the fructification of an Asplenium (verum) and 
the venation of Hemidictyon, except that it wants the marginal 
vein which unites the terminal veinlets in the latter genus. 
This will consequently rank with the Asplenium Finlaysoni- 
anum, represented on our preceding plate; differing however 
in the shorter broader frond, the paleaceo-setose stipes and 
rachis, the less acuminated pinne, which have the lowest half 
the broadest and most disposed to form an angle or auricle, 
(not the upper one). The root here too is simply fibrous, not 
forming a knob-like caudex. 
Fig. 1. Portion of a fertile pinna :—magnified. 
