TAB. CXCVI. 
HYMENOPHYLLUM TRIFIDUM. 
FILICES.—GrnaTx. Br.  PorvroprAcEm. Kaulf.  Firicrs verc. Willd. 
Gzw. Cuag. HYMENOPHYLLUM, Sm.  Sori marginales. — Capsule sessiles, receptaculo 
communi cylindraceo insertz, intra Znvolucrum bivalve, textura frondis, valvis planis, exterius 
liberis. Br. 
HyMENoPnvLLUM rifídum; fronde lineari-elongata pinnata, pinnis cuneatis profunde trifidis, laci- 
niis oblongis obtusis rarius ciliatis, involucris suborbicularibus longe ciliatis. 
Haz. In truncis arborum apud * Esmeraldas," regno Peruviano, alt. 5,000 ped. "Prof. Gul. 
Jameson. 
Caudex a nobis non visus. 
Stipes brevis, unciam vel sesquiunciam longus, gracilis, filiformis. . 
Frons spithameea, circumscriptione linearis, pinnata; pinnis sesquipollicaribus remotiusculis, oblique cuneatis sub- 
decurrentibus, costatis, obscure et minute reticulatis, profunde trifidis, rarius quadrifidis, marginibus hic illic 
ciliatis, pilis nunc bipartitis; segmentis lineari-oblongis, obtusis, omnibus (nisi in pinnis 2—43 inferioribus) 
soriferis. 
Involucra solitaria, terminalia, in singula lacinia pinnarum, orbicularia, fuscescentia, basi immersa, cuneata, superne 
bilabiata, labiis suberosis longe ciliatis. 
Receptaculum parvum, omnino inclusum, ad apicem capsuliferum. 
Capsule paucze, fuscee, annulo completo cinctze. 
Semina fusca, subpellucida, globosa, paululum angulata. 
Fig. 1. Portio frondis cum pinnis duabus soriferis. f. 2. Apex lacinise cum receptaculo capsulifero. f.3. Capsule. 
f. 4. Semina:—magn. auct. 
This beautiful Hiymenophyllum 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 pinnz from near their summit, and these bear- 
ing 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. 
