H EM ID IC T Y U M . Presl.
A s p l e n h , L . et Hook, et Grev. A l l a n t o d iæ ? sp. Wall.
Sori lineares, elongati, dorso venæ simplicis aut venulæ superioris venæ furcatæ
inserti. Indusium lineare, elongatum, p lan um— Species Americoe intratropicoe.
l'ro n d e s fasciculatoe herbaceoe; in una simplices, cordata-ovatoe, acuminatoe; in
altera pinnatæ, amploe, pinna opposita subinde m agnitudine diversa. Venæ internoe,
tenues, creberrimæ, pinnatæ, simplices aut furcatæ venulisque p aralkloe, versus marginem
ramosoe et ih maculas trapezoideas confluentes, ante marginem fro n d is in
costulam margini fro n d is parallelam desinentes. Presl.
Hemidictyum marginatum. ( T a b . LV. A.) Asplénium marginatum, i . A. Mikani,
Presl.
To tliis Genus Presi refers also the Aspknium Douglasii, Hook, et Grev. Ic. Fil. t. 150 ;
(but this appears to me a congener with Antigramma), and doubtfully, the Allantodia B runonis,
Wall.
. F ig . 1. Portion of a pinna of Hemidictyum marginatum , f 2. Sorus -, f 3. Sporangium ; f . 4.
Sporules :—magnified.
T A B . LV . B.
D IP L A Z IU M . Presl.
D i p l a z i i . S w . et Auct. sp.
Sori lineares, plus minus elongati, dorso venarum venularumve inserti, infimi superiores
subinde et inferiores duplices 1. bilaterales, superiores simplices (uti in
Asplenio), au t omnes bilaterales. Indusium lineare planum, in soris bilateralibus
bilaterale, margine libero sori unius (inferi) versus costam, alterius (superi) versus
costulam directo, in soris simplicibus unilaterale, margine libero semper versus
costulam directo.— Species plerumque intratropicoe. l/roB&e.s fasciculatoe, herbaceæ
aut coriaceoe, simplices et pinnatim divisæ. Venæ internoe, tenues, pinnatæ, simplices
aut supra basin fu rca tæ, venulisque paralkloe ante marginem apice libero acuto desinentes.
Presl.
Diplazium plantagineum. Sw.
( T ab. LV. B .) Fig. î . Portion of a frond with soriî f . 2. Sporangium:—;
Diplazium striatum. Presi.
( T ab. LV. B.) Fig. 8 . Pinnæ with sori.
Diplazium radicans. Presl. Asplénium. Sto.
( T ab. LV. B.) Fig. 4. Portion o f the same ;—magnified.