PTERIDOPHYTA HALCONENSES. 
127 
Lindsaya gracilis £1. 
Terrestrial in humid forests at 200 m. alt. (No. 5928). 
Throughout the Philippines, common. 
Malaya. 
Lindsaya pulchella (J. Sm.) Mett. 
Epiphytic on Alsophila at 850 m. alt. (No. 5927). 
Throughout the Philippines on tree-fern trunks. 
Malaya to Samoa. 
Lindsaya cultrata (Willd.) Sw., var. minor Hook. Sp. Fil. 1: 204. 
On boulders along the Alag River at 375 m. alt. (No. 5930). 
India to Madagascar and Australia. 
This little plant, collected in Luzon by Cuming, and in Negros by Whit ford, 
seems quite fixed in aspect, but the variety varia, common in Benguet, completely 
bridges the gap between it and the typical form. 
Lindsaya davailioides Bl. 
Terrestrial in ridge forests at 700 m. alt. (Nos. 5925, 5926), the specimens 
all bipinnate, also in ridge forests at 1,800 m. alt. (No. 5929) the specimens all 
simply pinnate; but Merritt collected bipinnate plants on Mount Haleon at 1,700 
m. alt. in June, 1906 (No. 4463 Merritt). 
Other Philippine collections are from Luzon and Palawan. 
Malaya. 
Lindsaya orbiculata (Lam.) Mett. ? 
Terrestrial in forests at 200 and 700 m. alt. (Nos. 6010, 5924). 
This plant is Lindsaya javensis Bl., a large form of which is L. flabellata var. 
gigantea Hook. I am doubtful of the propriety of regarding this as conspecific 
with the small fern already known from the Philippines as L. orbiculata. 
ATHYRIUM Roth. 
Athyrium toppingianum Gopel. ( Asplenium , Copel. in Perk. Frag. FI. Philip. 
(1905) 184). 
On damp ledges along streams at 375 m. alt. (No. 5921). 
Common in similar situations throughout the Philippines. No. 1218c Wichura, 
distributed as a variety of Asplenium Lasiopteris Mett., is probably this species. 
Dl PLAZI U M Sw. 
Diplazium japonicum (Thunb.) Bedd. 
On damp ledges along streams at 375 m. alt. (No. 5920), a small plant, differing 
from D. Oldhami Christ in being less glabrous. 
This plant is unquestionably congeneric with Athyrium toppingianum which 
is an unmistakable Athyrium. Diplazium in this part of the World has had a 
plural origin in Athyrium, and the naturalness of our classification would be 
promoted by ceasing to treat it as a distinct genus. 
D. japonicum is supposed to occur from Japan to Mindanao and India. 
Diplazium brachysoroides Copel. n. sp. (PI. I, Fig. A.) 
Stipite 20-40 cm. alto, 4 mm. crasso, basin versus nigro, supra sordide 
brunneo, rhachique paleis angustis horizontalibus 4-8 mm. longis sursum 
minoribus flexuosis sparsis vestitis; fronde -50-60 cm. alta, ca. 30 cm. lata, 
acuminata vix bipinnata apice pinnatifida; pinnis maximis medialibus, 
