398 ENUMERATIO FILICUM PHILIPPIN ARUxM. 



few Other allied species, renders it difficult to determine their 

 distinctive characters ; and were it not for the very obvious 

 difference exhibited by each in the branching and anastomo- 

 sing of the veins, I should be inclined to view them only as 

 so many different forms of one species. 



47. D. irioides Polypodium irioides,"^ J"otV.; R. Br — 



Luzon ; (n. 21.) 



fff Dipferis, Ueinw. 

 * Fronds bipartite, or palmate-digitate. 



48. D. Horsfieldii, R. Br. — Polypodium dipteris,"jB/?</«e. 

 — Dipteris conjugata, Ueinw Luzon; [n. 155.) 



** Fronds pinnatifid, lacinice articidated with the rachis. 



49. D. quercifoiia, Bory. — Polypodium quercifolium, Linn. 

 — Luzon •, (n. 25, 273, 414.) 



Obs. The long stipes and narrow lacinise of the specimens 

 marked " No. 414," afford a rather distinct specific charac- 

 ter; but viewing it in conjunction with others in my collec- 

 tion, I cannot consider it more than as a form dependent 

 upon local circumstances. 



50. ]). morhillosa. — Polypodium morbillosum, Fresl, Reliq. 

 Haenk — Samar; (n. 330.) 



51. D. adfine. — PolypodiumadfinejKem?/;. — Luzon; (m. 97.) 



AglAomorpha, Schott. 

 (Psygmium, Presl.) 



52. A. Meyeriana, Schott. — Psygmium elegans, Presl. — 

 Luzon ; {n. 49.) 



Obs. Although it appears probable that both Schott and 

 Presl have drawn up their respective characters of this genus 

 from the same specimen, yet they differ from each other, and 

 from my own observations. This has no doubt arisen from 

 the very obscure state of the fertile venules ; but by careful 

 examination it will be seen that the sporangia are not pro- 

 duced either on the apex of a free venule (as stated by Presl), 

 or on the confluent apices of two venules (as stated by 



