PBBNS 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 quinquepinnatind : 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 striatum Underw. is a Japanese plant with very strict fertile 

 segment, otherwise essentially like B. virginianum. 



!>. 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; hut the last two are certainly distinct. 

 India, Ceylon, Luzon. 



3. HELMINTHOSTACHYS Kaulfuss. 



Sterile segment tritid, the three divisions pinnatind 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. 



