NOTES ON THE BOTANY OF MANITOBA. 275 
the undisturbed prairie — from houses, though it may do so. 
The great increase in the size of the plants and their flowers when 
growing on these pare 3 patches of ground is generally most 
noticeable. The effect is precisely similar to that occasioned when 
a meadow plant is removed from all competition by being trans- 
planted to the rich soil of a garden. Rudbeckia hirta, common y 
called the “sunflower,” often makes a great show on “breaking 
that has been left undisturbed for an entire year. 
af Sewerde the close of pci this She succession of flowers 
8 to come almost to anend. There is then little or nothing 
lasted for about a fortnight. By the end of that time the prairie, 
hitherto so gay, had become of a storm sombre brown ; while the 
the only variations I observe 
The following is a list of the species, specimens of which I 
brought home. In writ ing it I have consulted Prof. Macoun’s 
‘Catalogue of ‘the Phenogamous an and Cryptogamous Plants of the 
Dominion of Canada’ — 1878), his (as yet incomplete) 
‘ Catalogue ot Canadian Plan (Montreal, 1883, &e.), Gray’s 
