Xx MEMOIRS OF THE 
his Northern tour, under the title of « Flora Scotica ; the 
value of which was greatly enhanced, by the new lights 
thrown on the cryptogamous plants in general ; and 
the excellent plates of several rare plants which accom- 
panied it. In the succeeding year appeared the second 
edition of Mr. Hudson’s book, in which the plants of the 
Flora Scotica, with many additional ones, previously dis- 
covered, were inserted. 'The works of these three different 
authors, the only practical ones of any note that have been 
published in this country, form the basis of the present 
catalogue. Where I have not had an opportunity of ob- 
serving or cultivating the plants which they enumerate, 
I have relied implicitly on their accuracy ; where I have, 
as an enquirer after truth, I presume I should have been 
censurable not to have used the lights, which perhaps a 
more minute enquiry, or better opportunities of cultivation, 
had afforded me ; hence I have in several instances differed, 
both from Mr. Ray and Mr. Hudson, and am sorry to have 
occasion to differ so materially from the latter, in the ac- 
count he has given of the Grasses, in the second edition of 
his work. The reasons at large for such differences will be 
given in the Flora Londinensis (vid. Ranuncutus hirsutus, 
Potyconum minus, Sepum sexangulare, &c.): the only 
notice taken of them here, will be to print in Italics those 
plants which I apprehend to be species, and which Mr. 
Hudson considers as varieties. As the garden contains 
more than two-thirds of the more perfect British plants, it 
was apprehended, that the addition of the remainder, which 
either cannot be made to grow, or have not yet been ob- 
tained, would render this publication more useful, not only 
to those who may have opportunities of visiting it, but to 
those also who have only the garden which nature affords 
them: they are incorporated with the rest, and distin- 
guished by having no figures prefixed to them. Such as 
have an asterisk, are considered as doubtful natives,” 
This catalogue of about six thousand plants, and the 
