h
P l a t e
L I S T OF F E R N S IN VO LUM E TWO
L X X V I I. Adiantum tenerum, Swartz,
P l a t e L X X V I I I . Pteris longifolia, Linnæus.
Pteris serruiata, Linnæus, Fii.
P l a t e L X X IX . Cheilanthes Fendleri, Fiooker.
Cheilanthes myriophylla. Desvaux.
Cheilanthes gracillima, D. C. Eaton.
P l a t e L X X X . Asplenium dentatum, Linnæus.
Aspidium mohrioides, Bory.
Ceratopteris thalictroides, Brongniart,
Asplenium firmum, Kunze,
P l a t e L X X X I . Ophioglossum vulgatura, Linnæus.
Ophioglossum crotalophoroides, Walter.
Ophioglossum nudicaule, Linnæus, Fil.
'Ophioglossum palmatum, Plumier.
á l
CO N SP E C TU S
OF TH E
F E R N S D E S C R IB E D IN T H IS WORK.
Synopsis of the Genera.
C o h o r t F IL IC IN EÆ .
V a sc u la r Cryptogamia having leaves or fronds usually raised on a
stalk, rising commonly from a creeping or assurgent or even erect root-
stock, and bearing on the back or margins sporangia containing spores
of but one kmd, which in germination produce a minute cellular pro-
thallus, on which are borne antheridia and archegonia, the latter after
fertilization producing a new plantlet. Stems never hollow, nor covered
with subulate leaves.
O RD ER F IL IC E S .
_ Leafy p lants; the leaves or fronds circinate in vernation, rising from a root-stock and
bearing reticulated sporangia which are homologous with leaf-hairs, being outgrowths from
the epidermis. _ Prothallus above ground, green, moncecious, in some cases producing new
plants irom uuiertilized archegonia. The sporangia are usually collected in little masses
called sort, which are oftenest found on the veins or at the lips of the veins, and are often
covered either by a little scale produced from the epidermal cells, c
r by a
general involucre formed from the recurved margin of the frond or its divisions.
o f l h e n i î r C ÿ S e T e 'd ï . t l ’ F'o“ ''''’ ' ' “ ^ .u b ord «„ «re ¡„d ie t e d belotv, thoegh b „t foe,
SU BO RD E R I. PO L Y PO D IA C E /E .
Sporangia globular, or slightly flattened laterally, collected in patches, lines or dots
ot various shapes, stalked, and provided ivitli a vertical incomplete many-iointed ring
which straightens at maturity and discharges the veiy minute spores, the sporangium opening
by a transverse spilt across the side not occupied by the ring.— Terrestrial terns.
T r ib e I . A C R O S T IC H E x E . Sporangia collected in large or indefinite masses on
the back of the frond, or entirely covering its ultimate divisions; indusium none.
I. Aoroa ticlium . Sporangia covering the whole lower surface ot the frond or of some ot
Its upper puimc.
In iB E n . P O L Y P O D I E S . Soii round or oblong, placed on the veins or at the
ends of the veins; indusium none. Stalk articulated to a slightly prominent knob of
the usually elongated creeping root-stock. Veins free or variously reticulated