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Botrychium rutaceum of Swartz. 
Of species, or supposed species, of deltoid Botrychium inhabiting 
this country, I will here consider we have but one ; and of this a fair 
representation is given above. With this plant, as British, Ray, Law- 
son, Doody, Dillenius, and Smith were familiar: the last-named bota- 
nist identified it with the B.rutaceum of Swartz, and abundantly 
proves his knowledge of the plant by his reference to figures. Mr. 
Cruickshank found three specimens of it on the sands of Barry, near 
Dundee, in August, 1839; one of them, evidently a monstrosity, is 
figured in ‘ British Ferns, p. 348. Mr. Cruickshank particularly 
states that no specimens of Botrychium lunaria were found near 
them. 
The second plant, which I am prepared, with Ledebour, to call 
matricarioides, and of the existence of which in this country there is 
no evidence, appears to me to be perfectly distinct as a species. In 
rutaceum, Wiild., the stipes, as in lunaria, ascends undivided until 
near its summit; it then throws off the barren branch, which is 
almost sessile, deltoid, and pinnate, exhibiting no tendency towards 
a tripartite division, but the pinne regularly decreasing in length, and 
being sublinear or subclavate, rather broader near the apex than at 
the base. In matricarioides, Willd., the stipes is divided almost at 
iis base, and below the surface of the ground, the barren branch 
appearing as a root-leaf, and its base evidently sheathing the base of 
