JOHN LEONARD RIDDELL 155 



viii, pp. 743-764, May, 1852, is prefaced by this 

 paragraph: 



" ' The following systematic list, embodying 

 the results of a great many years of observation, 

 by Dr. Josiah Hale, by the late Prof. W. M. Car- 

 penter, and by the author (Riddell), has been 

 abridged from a manuscript work contributed by 

 the author, in 1851, to the Smithsonian Institu- 

 tion. The manuscript work alluded to is entitled 

 "Plants of Louisiana." It comprises the tech- 

 nical and the vulgar names of the flowering and 

 filicoid species of plants, well ascertained as 

 growing within the limits of the State of Louisi- 

 ana (nearly all of which are represented by speci- 

 mens in the author's herbarium) with special 

 localities, times of flowering, and full descrip- 

 tions of the new species. The Cyperaceae and 

 Gramineae, specially contributed by Dr. Hale, 

 are not included in the present abridgement.' 



" There is another reference to the manuscript 

 in the Botanical Gazette, vol. viii, pp. 270 and 

 271, August, 1883, which gives no further data 

 regarding the manuscript, but states that { His 

 herbarium .... is said to have been very large 

 and excellently arranged.' 



" There is a further reference to his herbarium 

 in the Ohio Naturalist, vol. i, p. 33, January, 

 1901, which states that scarcely any of his speci- 

 mens seem now to be in existence, though he pre- 



