TAB. XXXVII.
G Y M N O G R A M M A . Desv.
Sori nudi, dorso venarum venularumque insidentes, tenues,^demum confluentes et
totam paginam frondis inferiorem obtegentes. Capsulæ breviter pedicellatæ au t
subsessiles.— Frondes fasciculatoe, simplices v. varie divisæ, nunc suhtus tomento
farinaceo colorato. Venæ pinnatæ, internæ, tenuissimæ, aut creberrimæ, flabellato-
multifurcatæ, aut distantes, venulis divergentibus. Venulæ apice Ubero punctiformi
aut acutissimo desinentes.— Species pleræque tropicæ.
Gymnogramma calomelanos. K aulf. ( T a b . X X X V Ï I .)—Acrostichum, L in n .
Of the limits of this Genus I do not at present attempt to speak. Presl includes a very
heterogeneous mixture, some of which have no natural affinity with the generally acknowledged
Gymnogramma, such as Cryptogramma Bruniona, and acrostichoides, Br., (thus
widely separated from C. crispa, Br., Allosorus, Presi,) the Grammitis Ceterach of Swartz,
&c. ; the latter of which may perhaps, witlUmore justice, be placed very near to, if not
united with, Aspknium. (See Hook. Ic. PI. t. 105, under Aspi. Dalhousice.)
Fig. 1. Under surface of a pinna ; magn, 10 diam.—/ 2. Smaller portion of do. ; m. 20 diam.—
/ 3. The same, with most of the sporangia removed j m. 20 diam.—/ 4. Sporangia in different stages ;
m. -100 diam.—/ 5. Ripe sporangium, bursting ; do.—f . 6. Ripe sporules ; do.—f . 1. Some clusters
of the white powdery excretion from the under surface of the frond ; m. 100 diam.
. I
i ■
i
Ì !
i ' i
ll I