l É l
I
Cyiithoeaceæ.
TAB. XXXIV.
T R IC H O P T E R IS . Presl.
C h n o o p h o k æ s p . Kaulf. A l s o p h il æ s p . Kunze et Mari.
Sori in medio dorsi venæ venulæque globosi nudi. Eeeeptaculum .sessile, globosum,
areolatum, pilis longis crinitum. Capsulæ subsessiles— Arbores aculeatæ, excelsæ.
Caudex 8-angularis, duodecim-octodecempedalis. Insertio stipitum in ordine spirali
dvodenario J / a ) , cicatricibus contiguis rhombeisplanis, verrucis externis in rhom-
bum dispositis, centralibus sparsis. Frondes coriaceoe, bipinnatæ, p innis pinnulisque
petiolatis. Venæ pinnatæ, crebræ, utrinque prominulæ, simplices aut fe r e a basi
furcatæ, venulisque paraüelæ ac apice incrassatæ. Presl.
T richopteris excelsa. Presl. (T a b . X X X IV .)— Alsophila (§ Chnoophora) excelsa.
Mart. le. Pl. Crypt. Bras. p . 63. tab. 27. 29. / . 1. 2. and tab. 37.— Polypodium
Tænitis. Both, K aulf.— P . Corcovadense. Eaddi.
Alsophila, Br. (see Tab. 9 and 21 of this work), is the Genus to Which the present is
the most nearly allied, and from which its author (P resl) has distingnished it in consequence
of the different insertion of the stipites, and the form and closeness of the cicatrices,
the dissimilarity of consistence of the frond, and in having the sori affixed to the middle
of the parallel veins and veinlets, prominent on both sides, and incrassated at the apex.
The species have indeed a very peculiar habit ; the petiolated pinnules are always lanceolate,
dark green above, pale, but dull and opaque below ; the fructifications so copious
that they form an uninterrupted line from the base, about equidistant between the costa
and the margin, but always stopping short of the point. The hairs of the receptacles are
equally present upon one species of Alsophila (Presl), namely, A . pruinata, which is however
abundantly difterent in other respects.
The species are T. exeelsa, denticulata, and elegans, Presl.
Fig. I. Portion of a pinnule, under side ; magn. 5 diam.—/ 2. Sorus j / S. Sorus seen from the
under side j and / 4. a vertical section of a sorus ; rn. SO diam.—/ 5. Sporangia ; m. 100 diam.—
/ 6. Sporules not quite ripe ; m. 400 diam.—/ 7. Recent hair, and / 8, one in a dry state, taken
from the receptacle ; m. 100 diam.