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TAB. LX II.
D IC T Y O X IP H IU M . Hooh.
Sorus inframarginalis, linearis, continuus. Indusium lineare, elongatum, continuum,
margini frondis parallelum, margine superiore liberum. Sporangia longe pedicellata.
Sporulæ ovales, rugosæ.— F ilix tropico-Americana. Rhizoma simplex,
crassum. Frondes coespitosoe, simplices, elongatoe, ensiformes, coriaceo-membra-
naceoe (fe r tile s plerumque multo angustiares) basi in stipitem brevem attenuata:,
costatæ, costa valida utrinque prominente. Venæ internee, transversoe, subapproxi-
malæ, flexuosæ, ramosissimoe. Venulæ in maculas hexagonoideas inoequales anastomosantes,
maculas minores ramuliferas continentes. Ramuli {seu venulæ secundarioe)
simplices furcatexve divaricate, apicibus clavatis.
Dictyoxiphium Panamense.— (T a b . L X I I .) .
H a b . Isthmus of Panama, on the coast o f the Pacific. Cuming, n. 1124.
This is quite a new Fern, and very unlike any that I can find described. The fronds
are simple, in general form resembling a very broad Vittaria, in the fructification a
Saccohma or Lindscea, in the venation an Amphiblestra (P r.) among the Adiantum group,
or a Gymnopieris among the Acrostrichum group. I have only received it from Mr
Cuming. The fronds are 2-3 feet lo n g ; the sterile ones much broader than the fertile
ones; but the sterile ones (as shown at Jig. 1.) sometimes become fertile towards the apex.
Fig, I. Portion of a sterile frond partially bearing fructification; f . 2. Smaller portion o f the same;
/ . 3. Portion of a fertile frond; f . 4, Smaller portion of same, seen from ben eath ; f. 5 . Portion of a
sorus ; / 6, 7. Sporangia; / . 8. Sporules :—magnijied.
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