LEAFLETS OF PHILIPPINE BOTANY 
EDITED BY A. D. E. ELMER, A. M. 
Vol. I. Manila, P. IL, November 6, 1907. Art. 13. 
SOME NEW AND CRITICAL FERNS 
BY 
E. B. COPELAND. 
(Bureau of Education, Manila, P. I.) 
—Q- — 
Dennstaedia elmeri Copel. n. sp. Rhizomate fide Almer 
iere 2 cm. crasso, ad terram repente, nigro aculeato, fron- 
dibus inter se 25 cm. distantibus; stipite fide Elmer usque 
ad 2 m. alto, aculeato; fronde, stipite incluso, 3-5 m. alta, 
tripinnata, rhadibus brevi-aculeatis badiis; pinnis oppositis, 
ad rhachin ut videtur articulatis articulatione cincta, 50-65 
em. longis, 20-25 cm. latis, late lanceolatis, acuminatis, rha- 
chidibus infra aculeolatis; pinnulis I pseudo-articulatis, ses- 
silibus, infimis exceptis alternantibus, valde acuminatis, 
rhachidibus puberulis; pinnulis II sessilibus, auriculatis, 
obtusis, maximis 15 mm. longis, 7 mm. latis, subcoriaceis- 
venis primariis infra puberulis, aliter glabris, ultra mediam 
laminam incisis; soris pinnulae II quaque usque ad 7, in 
fundis sinuum, 0.6-1 mm. latis, inflexis. 
Mt. Banajao, Luzon, 750 m. s. m. Elmer 8027; Mt. 
Maquiling, Matthew S. N., small specimens. I have no 
specimen of D. moluccana (BL) Moore, supposed to occur in 
Celebes and Formosa but this species differs in many 
ways from Blume’s diagnosis (Enumeratis, 1828 p. 239). 
The nearest relative in our flora is the comparatively small 
and simple D. erythrorachis, which has brown instead of dark 
maroon axes, and rhachises without spines. 
