PROGRESS OF BOTANICAL INVESTIGATION. XXXI 



Keys's there are a large number, as might be expected from his having 

 been for many years a resident in the town. Mr. Keys's Flora is indis- 

 pensable to all studying the botany of Devon and Cornwall. 



In Mr, H. C. Watson's invaluable Topographical Botany, as well as m 

 Compendium of the Cyhele Britannica, will be found several references 

 to Plymouth plants. They appear as species of either vice-county 2 

 (East Cornwall) or 3 (South Devon) in Topographical Botany. 



In the Reports of Thirsk Botanical Exchange Cluh, 1863-1865, and 

 London Botanical Exchange Cluh, 1866-1879, are mserted notices of, 

 and particulars concerning, many critical and other species of the neigh- 

 bourhood of Plymouth. 



The Journal of Botany, 1862-1879, contains many records of, and 

 remarks on, Plymouth plants contributed by myself from time to time. 



A complete Flora of the county of Devon, as well as of Cornwall, may 

 still be regarded as a desideratum ; for there are considerable tracts in 

 each of these counties that have not had one of their botanical produc- 

 tions recorded. 



