86 MISSOURI BOTANICAL GARDEN. 
duplicates have enabled me to add this island for a consid- 
erable number of species.* 
In the catalogue, each specimen that I have examined is 
noted by my own number or by italicizing the name of the 
collector, or, in the very few cases in which only a field 
note was made, by italicizing the name of the island cited. 
Where neither of these indications of personal observation, 
nor any specific credit, is given, the localities have been 
derived from Mr. Watson’s treatise in Godman’s Azores. 
As a matter of convenience, except where [ have thought 
differently as to specific limitations, the names of the Index 
Kewensis ¢ have been adopted for the catalogue. Peculi- 
arly Azorean species are indicated by the use of heavy- 
faced type. What may be called Atlantic species are 
indicated by small capitals. Established escapes and the 
like are entered in lower case type; and doubtful or 
casual plants are entered in small type. 
It is observable that a large percentage of the species re- 
ferred to on Mr. Watson’s authority only, have not been 
detected since the days of his own collecting and that of 
Mr. Hunt, a half century ago. Whether these plants not 
recently collected, but the record of which in most cases 
is scarcely to be questioned, have become extinct or more 
local, or, as is probable in some cases, have escaped recent 
observation because they have not been sought at the right 
season, must be determined by further studies. 
At the end of Mr. Watson’s paper (p. 278) is a table 
showing in part the occurrence of Azorean plants in other 
floras with which that of the Azores may be compared 
reasonably. After the thallophytes shall have been more 
fully studied, the preparation of another and fuller geo- 
* I cannot sufficiently express my gratitude to the gentlemen here 
named, for their numerous kindnesses, nor to Professor J. Henriques, 
of the University of Coimbra, through whom I made the acquaint- 
ance of those resident in the Azores. 
+ Jackson, Index Kewensis plantarum phanerogamarum. Oxford. 
1893-5. 
