128 
COPELAND. 
horizontalibus, acuminatis, nigro-pedicellatis, rhachin versus truncatis; 
segmentis oblongis, subacutis, maxi mis 3 cm. longis, 1 cm. latis, apices 
versus argute serratis, ala angusta connexis, rarius paucis ala carentibus 
(i. e., pinnulis) , papyraceis, supra atro-viridibus, infra prasino-olivaceis, 
glabris ; pinnis infimis paullo remotis diminutisque interdum deflexis, 
segmentis rhachiscopicis diminutis; costis venisque supra bilineato-praes-. 
tantibus, venulis furcatis ; soris infimis saepius diplazoideis, longioribus, 
aliis oblongis vix 2 mm. longis, 'venam tangentibus, vix ad marginem 
attingentibus, indusiis persistentibus. 
In silvis humidis, 200 m. s. m. (No. 5919). 
In spite of the apparently total absence of atliyrioid sori, I regard Athyrium 
silvaticum (Bl.) Milde (Brachysorus, Presl) as the nearest known relative of this 
fern. In Diplazium, its closest affinity is probably to D. sorsogonense Presl. 
Diplazium oligosorum Cope], n. sp. 
Rhizomate erecto, 1 cm. crasso; stipitibus confertis, 40 cm. altis, 
3 mm. crassis, basibus nigris incrassatis valde aculeatis paleis castaneis 
1.5 mm. latis paucis vestitis, sursum rhachibusque levibus, glabris, 
et nisi ad pedes nigros pinnarum brunneo-stramineis ; fronde 50-60 cm. 
alta, 40-50 cm. lata, acuminata, tripinnatifida ; pinnis oppositis, infe- 
rioribus ca. 3-jugatis satis sequalibus, ca. 10 cm. inter se distantibus, 
stipitatis, horizontalibus, acuminatis ; pinnulis subsessilibus, basibus trun- 
catis, 2 cm. latis, 7 cm. longis, acuminato-caudatis, fere ad costam in seg- 
mentis oblongis 4-5 mm. latis obtusis subfalcatis interdum serrulatis 
pinnatisectis, glabris, tenue coriaceis, supra atro-viridibus, infra pallidis ; 
venulis remotis, saepius simplicibus; soris margini quam costae propio- 
ribus, vix 1 mm. longis. 
In silva muscosa ad terrain, 1,800 m. s. m. (No. 5913). 
A most distinct species, characterized by the swollen spiny bases, large and 
few opposite pinnae, very acuminate pinnules and minute sori. 
Diplazium M err i 1 1 i Copel. n. sp. 
Rhizomate repente, 2 mm. crasso; stipitibus confertis, 2-5 cm. altis, 
paleis angustis horizontalibus 2-3 mm. longis nigro-brunneis dense ves- 
titis; fronde 15-25 cm. alta, utrinque angustata, acuminata, profunde 
pinnatifida, sinubus angustis, vel segmentis saepius imbricatis; costa 
supra sparsissime infra densius paleacea; segmentis oblongis, fere hori- 
zontalibus, medialibus maximis, 1 cm. latis, apice rotunda interdum 
denticulata, herbaceis, venis infra minute paleaceis, aliter glabris, supra 
atrovirentibus, infra olivaceis; venulis furcatis; soris linearibus, longio- 
ribus interdum ad marginem nec usquam ad costam attingentibus. 
Ad saxa in silva, 900 m. s. m. (No. 5914). 
Near D. zeylanicum Moore, and D. porpliyrorachis Diels, well characterized by 
the clustered fronds, short and very chaffy stipes, and imbricate segments, not 
separate even at the base of the frond. 
