(') COPBLAND. 



of at most 34 known species, cosmopolitan, but with a boreal center of 

 distribution. 



Pinnae flabellate rather than pinnate. 



Sterile and fertile segments separating just below sterile blade 1. B. lunaria 



Common stalk very short 2. B. simplex 



Fronds at least tripinnatifid. 



Fertile segment arising below the base of the sterile. 

 Sterile frond fleshy, typically with a hyaline margin. 



Segments widened on both sides above base 3. B. matricariar 



Segments not widened on both sides 4. B. obliquum 



Sterile frond without hyaline margin. 



Frond fleshy 6. It. tematum 



Frond thin, herbaceous. 



Fertile segment arising above middle of the petiole 6. It. dauoifolium 



Fertile segment arising lower down 7. B. japonicum 



Fertile segment arising from base of sterile 8. It- virginianum 



Fertile segment arising from mollis of sterile — 9. It. Utnuginoaum 



1. Botrychium lunaria (L.) Xwtz. 



Stipe stout, fleshy, <*5 to 10 cm high; sterile segment % to 6 em long, 

 about 2 cm broad, pinnate, rachis flattened rather than winged; pinnae 

 usually equal, broader than long, sessile or nearly so, subcuneate, entire 

 or variously incised on the outer side, fleshy, glabrous, the lowest pair 

 sometimes enlarged and doubly incised; fertile segment arising from 

 (or just below) the base of the sterile, its stalk 3 to 7 cm long, the 

 blade (panicle) lanceolate deltoid, pinna? stalked, the lowest pair pinnate. 



Himalay&S to Europe and Siberia; North America. Patagonia, New Zealand. 

 southern Australia. 



2. Botrychium simplex llitche. 



Like II. Lunaria, but decidedly smaller and more simple, and the stalks 

 of the two segments separating well below the base of the sterile one. 

 Japan, North America, northern Europe. 



:*. Botrychium matricariae (Schrank) Bpr. 



Stipe separating less than halfway up to the base of the sterile 

 segment; young frond hairy; sterile blade deltoid, in Chinese specimens 

 5 cm long, 4 cm broad, tripinnate, the lobes small, oval, widening abruptly 

 on both sides above the base, or even cordate, margin hyaline because of 

 thick epidermis; veins spreading above the base; stipe of the ample fertile 

 segment 10 cm long. The plant grows larger elsewhere. 



Central China, northern Asia. Europe and America. 



4. Botrychium obliquum Mtlhl. 



Like the preceding, but the common stipe very short— only 1 cm long 

 in Chinese specimens — the sterile segments broader than long, its ulti- 

 mate divisions more ample (i. e., less cut), and oblique, usually not much 

 widened above the base on the upper side, and the veins less spreading. 



Su-Chuen; eastern North America. 



