290 COPELAXD. 
The greatly enlarged lowest pair of pinnse and the strong development of the 
basiscopic pinnules of this pair are unique in Aihyrium, and strongly suggest 
that the plant is really a Dryopieris. 
GROUP OF A. JAPONICUM. 
3. A. japonicum (Thunb,) Copel. comb. nova. Asplenium japonicum Thun- 
berg FI. Jap. (1784) 334; Diplazium, Beddome; Athyrium Copelandi Christ in 
Philip. Journ. Sci. 2 (1007) Bot. IGl. 
Batanes Ir^lands, Bur, *S'ci. 3812 Fenix ; Babuyan, Bur. ^ci. 3899 Fenix; IVTount 
Data, Copeland 1900; Mount San Cristobal, Laguna, Copelaml s. n.: Mindoro, 
Merrill 5920. 
Japan to India. 
Even though construed fairly narrowly, excluding such forms as Dipla~ium 
Petersenii, this is still a decidedly variable fern, and I can not, judging from the 
single collection of .4. Copelandi, see suflicient differences to justify holding it 
distinct. 
4. Athyrium grammitoides (Presl) Milde. Diplazium gmmmitoides Presl 
Epim. ( 1849 ) 84. Asplenium hrachypodum Baker, Syn. Fil. ( 1874) 490. 
Asplenium toppingianum Copel. in Perkins Fragmenta (1905) 184. Athyrium 
nantim Christ in Philip. Journ. Sci. 2 Bot. (1907) 161. 
"Philippines" Cuming 56: Batilao, Bontoc, Copeland IS06; Benguet, Topping 
104, 28.J, 309, Elmer 57^7, 628o, Copeland 1801, Bur. Sci. 2812 Mearns; Mount 
Mariveles, Copeland 20Jfl ; Cavite Province, Bur. Sci. 1309 Maiigulat; Mount 
Maquiling, Copeland s. n.; Tayabas, Elmer HO.'/I : Mindoro, Merrill 59^1: Mount 
Canlaon, Negros, Copeland 2077: Lanao district, Mindanao, Clemens Gi>6, 1125a j 
Zamboanga, Copeland IJfOla; Mount Apo, Copeland l'/91, Williams 2519. 
A decidedly variable little species, but, as I here construe it, clearly distinct 
from all others known to me except .1. japonicum. Forms are rarely found 
which seem as near the latter as to A. grammitoides, A. Toppingii is what I 
now believe to be typical grammitoides. The variety mistum is a form occa- 
sionally found wherever the species is, and not entitled to consideration as a 
stable varietv. 
One of our sheets of Cuming^s Xo. 56 is entirely A. grammitoides, but the 
other contains also an immature plant which may be A. Williamsi, Judging 
from Baker's description I think he may have had the mixture before him, but 
his diagnosis applies most nearly to small specimens of A. grammitoides. A. 
nanum is described as a dwarf, such as is occasionally found in various places; 
but the type collection of A. namtm, Clemens fi5(}, includes also the typical form 
and the still large mistum. 
5. Diplazium Acrotis Christ in Bull. Herb. Boiss. IT. 6 (1906) 1000. 
Dr. Christ distinguishes this little fern from A. grammitoides by the absence 
of a wing on the almost filiform rachis, very regular pinniE, each with a sharp 
rectangular auricle, and paleae 5 mm long on the stipe. 
GTtOrP OF A. riLIX-FOEMTXA. 
6. Athyrium drepanopteron (Kze.) Moore. 
Benguet, Topping 237, 2/,0, 333, Pond s. «., Elmer 6^98, Copeland 1800, Boyce 
s, n., For. Bur. 5090 Cnrran. Bur. Sci. 215.'f, 3)35, 3^36, 3519, J,19U )-'/5» 
Ji52J, ^533 Mearns. 
Japan to northern Indui. 
