CV111 PROCEEDINGS-PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
Chelidonium majus, L .—Hooker says “from Inverness southwards 
probably naturalized, elsewhere an escape.” With us it is an estab¬ 
lished escape, keeping its place for many years, but scarcely spreading. 
Fumaria .•—All the species are called colonists. They are chiefly 
weeds of cultivation. 
Cheiranthus Cheiri , L.—Watson calls this an alien, and so I sup¬ 
pose it must be considered, as most botanists agree with that opinion. 
Its great abundance, in its wild form, on some of our precipices of 
trap rock, where it must have existed for a considerable period, gives 
it a distinction above other aliens. 
Barbarea vulgaris , Br.—Admitted as a native. From the situa¬ 
tion in which it grows I am, however, rather doubtful whether it is 
not an old introduction. 
Arabis perfoliata , Lamk.—Admitted as a native “from Perth 
southwards.” With us it is local and rare, and occurs only in places 
which are very suspicious. 
Sisymbrhmi Alliaria, Scop.—This is one of these hedgebank 
plants—of which there are several—that seem to me not to be above 
suspicion. Though it does occur away from hedge-sides, yet it is 
only in places to which it could easily have spread. I have never 
seen it in any very wild place. 
S. officinale , Scop .—A plant of roadsides and uncrowded waste 
ground, which would probably disappear if man’s occupation of the 
country ceased. 
Hesperis matronalis , L.—“Meadows, plantations, &c., rarely 
even naturalized ” (Studenfs Flora). Here it is thoroughly estab¬ 
lished among the debris of the trap-rock precipices in several places, 
and is probably an old introduction. 
Brassica campestris , L.—Usually a weed of cultivation only. In 
one place, on the rocks of Kinnoull Hill, it has, however, long been 
an established plant, and looks perfectly wild, though it is impossible 
to affirm positively that it is so. 
B. Sinapis , Vis.—Although chiefly confined to cultivated ground, 
it is possible that this has higher rank than a colonist. 
B. alba , Boiss.—Scarcely even a colonist with us. 
Capsella Bursa-Pastoris , Moench.—Roadsides and garden ground, 
from which, as Hooker says, it would soon disappear if the human 
occupation of the country ceased. 
Lepidium campestre , Br.—This is more frequently a plant of culti¬ 
vated ground than B Smithii , Hook., and, while often an introduc¬ 
tion only, has also some claim to be considered native. 
Raphanus Raphanistrum , L.—Seems to be a weed of cultivation 
only. 
Reseda lutea , L.—Great doubt has been entertained as to whether 
this plant has any claim to be considered native in Scotland. Most 
usually it is not more than a casual, but in a few places it seems to 
