TAB. LX X III. A.
M IC R O G R A M M A . Presl.
P o l y p o d i i , spec. Schrad.
Sori dorso venulæ secundariæ in tra raacalam mediam inserti, ovales, uniseriales,
nudi. lieceptaculum lineare, crassiusculum. Sporangia c reb errim a— Filix
tropicO’Americana. Rhizoma repens. Frondes sparsoe, herhacece, brevissime
stipitatæ, glaberrimoe, simplices, lineari- aut oblongo-lanceolatæ, acuminatoe, inie-
gerrimoe, basi angustatoe. Venæ pinnatæ internæ, tenuissimæ, ramosæ. Venulæ
in maculas costales transversim oblongas irregulares, médias et marginales hexagonoideas
anastomosantes, maculis mediis interne venulas secundarias in maculas plures
oblongas aut irregulares anastomosantes vel libéras apice punctiformi incrassatas
continentibus, marginalibus una-pluribus venulam liberam defiexam apice punctiformi-
incrassatam emittentibus. Presl.
yi\CYogYQ.mmù. persicariæfolia. P r .—{ T a b . L X X I I I . A.)
Presl has derived tlie generic name from the short sori as compared with other Gram-
mitideoe. In point of venation it corresponds with Presl’s Genus Pleopeltis among the
Polypodiaceoe : and, indeed, the form of the sori seems intermediate between the linear
ones of the former group, and the globose ones of the latter.
T ab. L X X I I I . Fig . 1. Fertile frond of Microgramma persicariæfolia ; f 2. Smaller portion of the
same ; / 3. Single sorus ; / 4, 5. Sporangia ; f . 6. Sporules :—magnified.
TA B . L X X I I I . B.
L O X O G R A M M F . Presl.
G r a m m i t i d i s , sp e c . Sw. et Auct. P o l y t æ n i u m , Desv, A n t r o p h y i , Sect. 2 .
L o x o g r a m m e , Blume.
Sori dorso venæ lateralis longioris unius au t duarum suprapositarum inserti, lineares,
elongati, crassi, obtusi, n u d i Filices intratropicoe, indicoe. Rhizoma repens.
F ro n d es sparsoe, coriaceoe, simplices, integerrimæ. Venæ internoe, tenuissimæ, ramosissimoe,
venulisque in maculas hexagonoideas elongatas inoequales anastomosantes et
reticulum laxum efficientes. Presl.
Loxogramme lanceolata. Presl.— { T a b . L X X I I I . B .)— Grammitis lanceolata, Sw.
A n tro p h y um lanceolatum, Blume.
This Genus, the author tells us, holds the' same place among Grammitideoe, that Sagenia
does among Aspidiaceæ, Dictyopteris among Polypodiaceoe, Pteropsis among FoenUideæ and
Pcecilopteris among Acrostichaceoe. \ All the species are of Indian origin (ten of them),
except L . lineata (Hemionitis lineata, Sw.), which indeed has some points of structural
difference.
T ab. L X X I I I . B. Fig. 1. Portion of a fertile frond of Loxogramme lanceolata ; nat. size s f , 2.
Smaller portion ; f . 8, 4, 5, 6. Sporangia; f . 7. Sporules :—magnified.