PHiLirrixK sri-:riKs of ATirvuirM. 299 
This is generally, ami, I believe, correctly construed as Dipluziuin proUfcrutn 
(Lam.) Tliouars, ami I should have accepted that specific name except that it 
was occupied in .4 thyrium before Mildo used it ; decusfiafum is likewise pre- 
occupied. The next possibly applicable name, in age, is DipJazium Sirarfzii 
Bl. Enunicratio 191. In the diagnostic characters of D. ^icarizii and D. acccdeus 
Bl. Enuni. 192. as given by Blume, the Philippine plant exactly fits the latter; 
for this reason and because the latter name is already in use in Afhyrtum for 
this plant, I have thought it unwise to take up and transfer the name ^icartzii, 
Gl^OUP OF A. FRAXINIFOLiTM. 
40. Athyrium palauanense Copel. comb. nova. Diplazium palauanense Copel. 
in Perkins' Fragmenta (1905) 186. 
Palauan^ Merrill l/jG: ilindoro, Merrill 3015. 
This species serves to bridge the gap between the groups of A. pUinatum and 
A. fraximjolivm. 
Near this, but distinct, is Williams 2^Go, from !>rount Apo, Mindanao. It 
is thinner in texture, the rachis is pubescent and proliferous at the upper end, 
pinnae broader at the base, the margin more regular, and the sori like those of 
A, pallidum, rather than like those of -1. pinnatnm, as are those of A. palauanense. 
41. Athyrium fraxinifolium (Presl) Milde. 
Diplazium hantaiiiense Blume, Enumeratio (1828) 190. For other synonyms, 
see Christensen. 
Luzon, Vuming 276j Benguet, Elmer 6222; Rizal, Merrill 1606, Bur. Set. 2626 
Ramos: Xcgros, Copcland GO, 80, Whilford 1598: Jjcyte, Cuming 305: Mindanao, 
Surigao, Bolster 309; San Ilamon, Cupeland 1656; Mount Apo, Copcland 1-YJO: 
Balabac, Steere. 
Malaya, India, Japan. 
I have the hmg tried to maintain hantammse and fraxinifoliinn as distinct, but 
am now satisfied that it should not be done. There is every intermediate step 
between specimens with the veins all free, and those which have them regularly, 
if not very eopioxisly uniting. Tt also often happens that on different parts of a 
single plant, and, in fact, of a siiigle frond, as is true of Cuming 305, there arc 
some areas wliere the veins aaiastoniose regularly, and others where they arc very 
nearly all free. The pinu* are sometimes entire, sometimes serrulate to the apex. 
I have not been able to detect any correlation between margin and venation, in 
this spcies. 
42. Athyrium Cumingii (Presl) Mildc. 
Luzon, Cuming 116; Mount Banajao, ^yhitford J HO, Elmer 2IH:i7, UOSO ; 
Mindoro, Merrill 5912, For, Bur. 12232 Rosenhlufh. 
Celebes, teste Christ, Ann. Jard. Buitenz. 15 (1807) 122, 
43. Athyrium tabacinum Copel. comb, nova. Dipladiim tahacinum Copel. in 
Philip. Journ. Sci. 1 (1900) Suppl. 149. 
Mount Apo, Copeland 7.',90, Williams 2510: Horn of Negros, Elmer 9717 ( ?) : 
Mindoro, For. Bur. 9925 Merritt, sterile. 
44. Athyrium pariens Copel. comb. nova. Callipteris paricns Copel. in Perkins' 
Fragmenta (190o) 18<>. 
:Mount Apo, Copeland 72^1, 1J,9J,: Horn of Xegros, Elmer 9716. 
Although this is untpiestionably veiy near the preceding and the two grow 
mixed in both places where they have beoji found, there are other differences 
evident enough so that without noticing the venation Elmer kept the two separate 
in the field. And so far as experience goes, the venation characters of both are 
constant. 
