434 MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
5. DIACALPE, Blume. 
1. D. AsPrDIOIDES, Blume, Enum. Pl. Jav. Fil. 241. Ultimate segments oblong, cuneate, 
nearly glabrous beneath, reddish or brown when dry.— Hk. & Bauer, Gen. Fil. t. 99; 
Hook. Sp. Fil.i 59; Bedd. Ferns South. Ind. t. 257; Hk. & Baker, Syn. Fil. 45. 
D. Hookeriana, Moore, in Gard. Chron. 1854, 135. Spheropteris Hookeriana, Wall. 
Cat. 775. Peranema aspidioides, Mett.; Kuhn, in Ann. Mus. Lugd. Bat. iv. 285. 
Aspidiwm foliolosum, Wall. Cat. 359, partly by admixture. 
Nepaul to Bhotan; alt. 6000-9000 feet, abundant. Khasia; alt. 4000—6000 feet, 
common.—Distrib. Ceylon, Moulmein, Tavoy, Malay Archipelago. 
Very large and compound at its upper limit (9000 feet). Rhachis of pinna with 
blackish or chestnut linear scales or lax hairs. Involucre often splitting regularly by a 
clean dehiscence into two lips, in which state it cannot be separated from Dicksonia. 
This species so exactly resembles Davallia nodosa, Hook., that it has been repeatedly 
mixed with it by very competent botanists, from Wallich downwards. The pinne are 
often subopposite, with large ovate thin scales at their base; the venation is similar; and 
if the inchoate sorus (as Mettenius maintains) is not exactly similarly placed on the 
vein, it is very nearly so. Davallia nodosa may generally be distinguished (apart from 
the involucral character) by the much greater glabrousness of the rhachis of the 
pinna. 
2. D. FENICULACEA, C. B. Clarke. Ultimate segments linear-acute, with few scattered 
long lax hairs beneath, glossy green when dry.—Aspidium feniculaceum, Hook. Sp. 
Fil. iv. 36, t. 237; Hk. & Baker, Syn. Fil. 256. Lastrea faniculacea, Bedd. Ferns 
Brit. Ind. t. 36. 
Sikkim; alt. 7000—10,000 feet, east, west, and north, scattered, not common; but ` 
abundant at Buckeem, Upper Ratong, alt. 8000—9000 feet. 
Stipes tufted. Closely allied to D. aspidioides. The involucre is leathery, dark purple, 
spherical, attached by the one point under its centre, not stalked, splits irregularly 
from above into 2-5 triangular segments. 
6. Oxocrza, Linn. di 
1. O. omrzwTALIS, Hook. Sp. Fil. iv. 161; Hk. & Baker, Syn. Fil. 46. Séru£hiopteriS ` 
orientalis, Hook. 2nd Cent. Ferns, t. 4; Bedd. Ferns Brit. Ind. t. 171. x 2 
Sikkim; Lachen, alt. 12,000 feet, Sir J. D. Hooker; alt. 9000 feet, H. J. Elwes. ` 
Khasia (probably near Shillong), Dr. Jerdon. Assam (probably near Shillong or pe D 
sibly the Gowhatty Teelas), Simons.—Distrib. Western China, Japan. 
7. Woonsta, R. Br. 
1. W. HYPERBOREA, R. Br. in Trans. Linn. Soc. xi. 173, t. 11; Hk. & Bauer, Gen. Fil. Xs 
t. 119; Hook. Sp. Fil. i. 64; Hook. Brit. Ferns, t. 7; Hk. & Baker, Syn. Fil 46. 
W. hyperborea, R. Br. A. form 8. subcordata, Mili Fil. we: 163. siden: 
Airimem M ue t. 2023. : ilr: ; 
