H Y M E N O P H Y L L U M T R I F I D UM .
F ILICES.—G y r a t æ . B r . P o l y p o d i a c e æ . K a u lf. F i l i c e s v e ræ . Willd.
G e n . C h a r . H Y M E N O P H Y L L U M , Sm. Sori marginales. Capsulæ sessiles, rcceplacnlo
communi cylindraceo insertæ, intra Involucrum bivalve, textui-a frondis, valvis planis, exterius
liberis. Br.
H v m e n o p h y l lu m trifidum; fr o n d e lin e a r i- e lo n g a t a p in n a ta , p in n is c u n e a t is p r o fu n d e t r if id is , la c in
i is o b lo n g is o b tu s is ra riu s c ilia t is , in v o lu c r is su b o r b ie u la r ib u s lo n g e c ilia tis .
H a b . I n t ru n c is a r b o rum a p u d “ E sm e r a ld a s ,” r e g n o P e r u v ia n o , a lt . 5 ,0 0 0 p e d . Prof. Gul.
Jameson.
Caudex a nobis non visus.
Stip e s brevisj unciam vel sesquiunciam longus, gracilis, filiformis.
B-o n s splthamæa, circumscriptione linearis, pinnata ; pinnis sesquipollicaribus remotiusculis, oblique cuneatis sub-
decurrentibiis, costatis, obscure et minute reticulatis, profunde trifidis, rarius quadrifidis, marginibus hic illic
ciliatis, pilis mine bipartitis; segmentis lineari-oblongis, obtusis, omnibus (nisi in pinnis 2— 3 inferioribus)
soriferis.
In volucra solitaria, terminalia, in singula lacinia pinnarum, orbicularia, fuscescentia, basi immersa, cuneata, superne
bilabiata, labiis suberosis lon ge ciliatis.
Receptaculum parvum, omnino inclusum, ad apicem capsuliferum.
Cap su la paucoe, fuscæ, annulo completo cinctæ.'
Semina fusca, subpellucida, globosa, paululum angulata.
Fig . 1. Portio frondis cum pinnis duabus soriferis. f. 2. Ap e x laciniæ cum receptáculo capsulifero. f. 3. Capsuloe.
f. 4. Semina:—magn. auct.
This beautiful Hymenophyllum may truly be reckoned among the most distinct of a genus, the
limits of whose species are in general not easily defined. It is remarkable for its long linear fronds,
which are regularly pinnated with almost equal-sized pinnæ from near their summit, and these bearing
ciliated sori at the extremity of their trifid segment. Professor William Jameson has been
peculiarly fortunate in discovering many new and highly curious species of Fern in the vicinity of
Esmeraldas ; and there is no question but other parts of Peru would equally reward the labours of
a botanist in this and other departments of the science.