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A N IS O G O N IU M . Presi.
D i p l a z i i sp. Sw. et Auct. A s p l e n h sp. Sw . et Auct.
Sori lineares, elongati, in venis infimis bilaterales seu duplices, in reliquis unilaterales
seu simplices. Indusium lineare, planum, in soris biserialibiis margine
lino libero versus costam altero versus costulam, in soris unilateralibus margine
libero versus costulam directo.— ViWcQsintratropicce. Frondes fascicxdatoe,coriaceoe,
aut herbaceoe, simplices aut soepius pinnatim divisæ. \ QXiæ internæ, tenues, pinnatæ,
infimæ oppositæ in arcum acutum apice venuliferum connatæ, superiores ante marginem
frondis apice obtuso terminatæ aut rarius p roeter supremas in arcus apice venuliferas
connatæ. Presl.
Anisogonium decussaium, Presl. Asplénium, Sw . Aspi, proliferum. K aulf. Diplazium
bulbiferuni. Bojer, in Herb, nostr.—Sieb. Syn. Fil. n. 30.
( T ab. LV I. A. Fig.. 1. Portion of a pinnule with sori ; f . 2 . Single sorus ; f . S. Sporangium ^
/ . 4. Sporules :—magnified.)
Anisogonium sylvaticum. Presi. Diplazium. Sw. Asplénium. Presi.
( T ab, LV I. B. Fig. 1. Portion of a pinnule ; f . 2. Sorus ; f . 3. Sporangium ; f . 4. Sporules
magnified.)
Presi remarks of this Genus, “ a Diplazio venarum arcubus distinctissimum but it
will be perceived by the figure of our A. sylvaticum, Presl, that the lower opposite veinlets
do not unite “ in arcum acutum,” and I do not see how it is then to be distinguished from
Diplazium.
TA B . L V I. C.
D IG R A M M A R IA . P r.
A s p l e n h s p . Sw . D i p l a z i i sp . Spr.
O f this Genus, P resi mentions only one species, the Asplénium amhiguum, Sw.
(D ip la zium Malabaricum, S p r.) ; and he remarks, “ Genus adhuc insufficienter
notura, cum sori mihi in statu valde imperfecto in n o tu e ru n t, ab omnibus tamen
generibus Aspleniacearum e t imprimis Diplazieariim venis infimis oppositis in
arcum anastomosantibus angulis venuliferum d islinguitur et Cnemidariam e
Cyatheaceis in memoriam revocat.”-—B u t though I have examined copious
specimens from the E a st Indies of what I cannot doubt is the tru e Asplénium
ambiguum, Sw., 1 find in every case the venation to be as here represented and
as figured by Scbkiibr, Fil. t. 75, and not different from th a t o f Anisogonium
decussahim.
Digram m a ria ambigua. Presl. ( T a b . L V I. C.) Asplénium, Sw . Diplazium
Malabaricum, S p r.— Hook, et Arn. Bot. o f Beech. Voy. p. 256.
F ig . 1. Portion of a pinna with sori; f . 2. Sorus ; f . 3. Sporangium ; / . 4. Sporules :—magnified.