472 BOTRYCHIUM LUNARIA. 



A native of most parts of Europe. Found in Siberia, Sikkim, 

 Kamtschatka, Newfoundland, Greenland, Bear Lake, Beliring's 

 Straits, Fuegia, Tasmania, Victoria; the Himalaya, Ural, Altai, 

 and Rocky Mountains. 



Difficult to cultivate, and requiring to be transplanted in the 

 grass sod in which it is found, as the grass seems to be essential 

 to its existence. 



Length of frond from two to ten inches, stout and fleshy. 



Sterile fronds smooth, dark green, pinnate, with from four 

 to seven somewhat lunate pinnae. 



Fertile frond narrow, rachiform spikelets flattened, and being 

 on the inner side, a double row of erect grape-like spore-cases. 



The fronds spring up in April, and die away in July. 



There are a few varieties: — 



RuTACEUM, Moore. — Differs in having a broad triangular 

 twice-divided sterile frond, and in the three to four pairs of 

 secondary divisions being narrow-oblong. Found at Barry, near 

 Dundee. 



Tripartitum, Moore. — Found by the late Dr. Kinahan on 

 Kilmashogue Hill, in the county of Dublin. Fronds deltoid, 

 differing from the normal form in having a three-parted instead 

 of a single axis, each frond resembling three normal fronds. 



Incisum, Milde, {Moorei, Lowe.) (Plate LXXVI — B.) — 

 Found at Halifax by Mr. Bolton; Crosby Ravensworth, West- 

 morland, by the late Mr. Clarke; Kilnasanton, Dublin, by Dr. 

 Kinahan. Differing in having the pinna3 deeply incised, and 

 so cutting the margins into narrow segments. 



