“BOTANY OF THE AZORES. 391 
species, or whether all the various Azorean forms belong to 
one or two very variable species, I do not feel myself pre- 
pared to say. Indeed, the genus Tolpis (or Schmidtia) in the 
Azores, seems to be as troublesome in species and varieties, 
as is that of Hieracium in Britain. 
183. Microderis rigens (De Cand.)—I believe it may now 
very confidently be stated that the M. umbellata (Hochst.) is 
identical with the M. rigens (De Cand.) ‘The scape varies 
in being glabrous or slightly hispid, and the inflorescence is 
strictly neither umbellate nor corymbose ; though the latter 
term applies well enough in most cases. 
V . 188. Bidens leucantha (Willd.)—* A mere variety of B. 
pilosa (Linn.)” P. B. Webb, Esq. | 
200. Senecio Maderensis (De Cand.)—If we take the pre- 
Sence or absence of stipules, as the diagnostic character 
between Maderensis and malvæfolius, both species occur in 
the Azores, Judging by the specimens, living and- dried, 
the latter may be a more robust plant; its stem rising to 
three feet high, under cultivation, and being as thick as a 
finger near the ground. 
* 214. Atriplex patula (Linn.)—This species may be held 
doubtful. My specimens are in an early stage, and possibly 
c belong to A. rosea (Linn.) se D HR 
4 ,??3. Polygonum * * *? — This is identical with the spe- 
Ses distributed among Bourgeau's Canary plants, under the 
. Pame of Persicaria serrulata (Moq. et Webb.) As I found 
 * myself in two of the islands, and have since received 
Specimens from a third, St. Michael's, while I neither found, 
Por have received, the Polygonum Persicaria, it seems pro- 
le that the species enumerated under this latter name, in 
‘ra Azorica, may be the Polygonum serrulatum (Lag.), and 
. POtthe Linnean P. Persicaria. —— ca docti 
: or Polygonum maritimum (Linn.)—The straggling habit 
ls me to suspect the identity of P. maritimum (Lin | ind 
‘itt (Bab.), belong only to those of the first season 
"long internodes of the plants raised in England, which — 
