Ocrosga 30, 1908] PrkRiDOPHYTES OF THE Horn or Negros 413 
and since Christ never intended to replace P. longifolium 
or P. revolutum, I am carrying the technicality to the bitter 
end and upholding P. revolutum C. Chr. (incidentally Drynaria 
r. of J. Sm.) Index p. 3381. 
To sum up, my opinion is that Christensen, though he 
intended to transfer Smith's name, failed to do so, either 
because the plant incurred mention before he was ready for 
it, or because, as a nomen nudum,.it was not subject to 
transfer; and that because he failed, the name he used will 
stand. But if he did succeed in transferring Smith’s name, 
then Chris, in subsequently attempting to give a name to 
a plant regarded as distinct from P. revolutum C.. Chr., did 
give to the latter the only valid name it has. Are we not - 
fortunate in having logical rules? 
Polypodium validum Copel. 
On rocks in ravines, alt. 600 m., No 9946. ‘‘Manalo.’’ 
Mindanao, Mindoro. 
Polypodium heterocarpum BI. non Mett. nec C. Chr. 
On humus covered boulders by Bonyao river, alt. 750 
m., No. 9868. 
Luzon, Mindanao. 
Java, Celebes. 
Polypodium glauco-pruinatum C. Chr. 
Alt. 1200 m., No. 9962. “Locdo.” 
Luzon, Mindoro. 
Polypodium Phymatodes Linn. 
On dead limbs in open woods, alt. 600 m., No. 10428. 
Common in the Philippines. 
Africa to Polynesia. 
This is a very ample form, already collected in Mindoro 
and in the Batanes Islands. 
Polypodium commutatum Bl. 
Creeping on soil or mossy boulders, alt. 750 m., No. 
9701. ''Cabeabon."? 
Luzon, Misao gat 
Java. 
