FERNS OF THE MALAY- ASIATIC REGION. 
I 
5. Botrychium ternatum (Thunb.) Swartz. 
Similar to the two preceding species but thinner in texture, without a 
hyaline border, and with the margin finely toothed ; fronds about 10 cm 
broad, nearly as long, usually quinquepin natifid : total height of fertile 
segment 30 cm. 
Japan to the Himalayas. 
6. Botrychium daucifolium Wall. 
Axes permanently more or less hairy ; common stipe 10 to 17 cm high, 
fleshy, special stipe of sterile segment 2 to 5 cm long, blade 10 to 30 cm 
each way, deltoid, tripinnatifid, or sometimes tripinnate; segments lan- 
ceolate-oblong, 7 mm more or less broad, sharply irregularly toothed, 
herbaceous; fertile segments equaling or exceeding the sterile. 
India to Java, Mindanao, and Negros. 
7. Botrychium japonicum (Prantl) Und. (Plate II.) 
Very like B. daucifolium , the stipe forking about halfway from the 
base of the sterile blade to the stem, the sterile margin more finely and 
regularly toothed, and the fertile segment far overtopping the sterile. 
Japan. 
8. Botrychium virginianum (L.) Swartz. 
Mature frond practically glabrous, stipe about 20 cm high; sterile 
segment deltoid, 15-30 cm each way, usually quadripinnatifid and the 
larger lobes then incised at the apex, with sharp uniform teeth about 0.7 
mm broad, herbaceous or membranaceous; fertile segment ample, arising 
from the base of the sterile, and its stipe usually surpassing the latter. 
Yunnan and the Himalayas, Japan, Europe, America south to Brazil. 
Botrychium strictum Underw. is a Japanese plant with very strict fertile 
segment, otherwise essentially like B. virginianum. 
9. Botrychium lanuginosum Wall. 
Similar to B. virginianum, but the main axes permanently pubescent, 
the texture not so thin, the secondary or tertiary pinnules more flabellate, 
and the fertile segment arising from the rachis of the sterile and the 
whole fertile segment usually not equaling the sterile. 
Following most recent authors, I have split the species in this genus more 
finely than I am at all sure is justified; but the last two are certainly distinct. 
India, Ceylon, Luzon. 
3. HELMINTHOSTACHYS Kaulfuss. 
Sterile segment trifid, the three divisions pinnatifid into a few large 
lobes, veins curved, free; fertile segment erect from the base of the 
sterile, stalked, very compact, with very short, close branches ; sporangium 
opening by a longitudinal slit. A single species. 
