PROCEEDINGS—PERTHSHIRE SOCIETY OF NATURAL SCIENCE. CXV 
Stachys arvensis , L.—This appears to be, now at least, a weed of 
cultivation. 
\Stachys Betonica, Benth.—Watson makes some interesting com¬ 
ments on this species, pointing out that it is a good example of the 
thinning out and gradual disappearance in North Britain of plants 
which are plentiful and conspicuously characteristic in South Britain. 
In England its distribution is continuous from south to north. In 
Scotland it occurs in a few counties only, Perthshire being its north¬ 
ern limit. Although, as Hooker says, “ formerly much used medici¬ 
nally,” few Scottish botanists have marked it as an introduced plant, 
an exception being Hennedy, for Lanarkshire. In Perthshire it is 
a local plant, and its distribution is somewhat peculiar, but there can 
be no doubt about its being indigenous. It thus affords a good 
example of how the continuous distribution of species may be inter¬ 
rupted, and a warning against supposing that because a local plant 
has been used medicinally it is therefore necessarily an introduction.] 
Galeopsis Ladanum , L.—Watson calls this a colonist, which it 
probably is. 
G. Tetrahit , L., and G. speciosa, Mill.— The latter is certainly 
a weed of cultivation, and the former mostly so. 
Lamium purpureum , L., L. intermedium , Fr., and L. amplexicaule , 
L. — These seem to be all dependent more or less upon man. 
L. album , L. —That this is native does not seem to have been 
questioned. With us it is only a roadside and hedgebank plant, and 
therefore I think that it must be regarded with some suspicion. 
L. maculatum , L., an undoubted alien, has been found in wilder 
places than Z. album. 
Chenopodium album , L. — Mostly, if not entirely, a weed of culti¬ 
vation. 
C. Bonus-Henricus , L. — “A native?” (Watson). With us it 
seems to have no claim to be considered indigenous. 
A trip lex patula, L. —Mostly, if not entirely, a weed of cultivation. 
Polygonum Bistorta , L. — A garden escape, except at the Lake of 
Monteith, where I think it is native. 
P. lapathifolium , L., and P Persicaria , L. — These are frequently 
weeds of cultivation, but I think may be claimed as natives. 
P. aviculare , L.—Like the last two species, this plant is much in¬ 
debted to the operations of man for its extended distribution and 
great increase in the number of individuals. At the same time it 
appears to be indigenous. 
P. Convolvulus , L. —Only a weed of cultivation, I think. 
Rumex Hydrolapathum , Huds.—Although Mr. Barclay, in the 
paper cited above, is inclined to throw doubt upon this dock being 
native in Perthshire, there do not seem to be any grounds for that 
opinion beyond the fact that the root is astringent and may therefore 
have been used in country medicine. While it is very local in its 
