NoveMBER 15, 1910] THe Ferns or Mount Apo 803 
` 950 em. altis, patentibus; stipite breve, 2.5 cm. crasso; lpaleis 
griseo-ochroleucis vestito; rhachi eastanea minute tuberculata, 
glabrescente, apud baseos pinnarum aerophoris solitariis praed- 
ita; pinnis sessilibus, maximis 40 cm. longis, rhachi infra 
subglabrescente; pinnulis sessilibus, maximis 5 cm. longis, 
costis supra hirsutis, infra paleis nitidis castaneis pallido- 
marginatis lanceolatis acuminatis praecipue versus rhacbeos, 
et aliis minutis ovatis vestitis; pinnulis!! inferioribus liberis, 
7 mm. longis, vix 2 mm. latis, supra mediam serratis, obtusis, 
subcoriaceis; venulis utroque latere 6-7, quarum ca. 4 fur- 
eatis; soris costularibus; indusio globoso, 0.7 mm. lato, mox 
ore regulare aperto, membranaceo, persistente, plerumque 
demum fisso. 
In dense woods along Seriban creek, Mt. Apo, alt. 
1800 m., No. 11482. ''Notong." 
This species has some striking characters in common 
with C. zollingeriana Mett. and with C. orientalis Moore. It 
is not very much like any previously known Philippine species, 
but suggests C. lanaensis Christ as much as any. 
Cyathea heterochlamydea Copel. in Elmer’s Leaflets 2 
(1908) 418. 
In dense woods, alt. 1200 m., No. 11634. "''Notong." 
Trunk 6 m. or more high, stout; fronds more than 2 m. long. 
Horn of Negros. 
Cyathea Christii Copel. in P. J. S. 1, Suppl. (1906) 114. 
In dense forest at foot of Mt. Calelan, alt. 1200 m., 
No. 10601. This collection is fairly typical. No. 11459 from 
Mt. Apo, alt. 2000 m. is a plant with trunk 5 m. or more 
high, but very reduced foliage, which I cannot distinguish 
by valid characters from ©. christi. 
Mindanao. 
Cyathea Elmeri Copel. in P. J. S. 4, C (1909) 54. 
In moist woods at foot of Mt. Calelan, alt. 1200 m., 
No. 10585. Trunk 5 to 8 m. high, 10 em. thick; fronds 3 m. 
long. There is an evident rudimentary indusium, which I 
am unable to detect on the type collection. 
