THE HAMILTON ASSOCIATION. 83 
chiefly sand, but there are nuclei of rocks around which it very likely 
gathered when the Point was being formed. Amongst the more 
noteworthy herbaceous plants were A/zbzscus Moscheutos, the Swamp 
Rose Mallow, which, besides being quite rare, produces the largest 
flowers of any native plant. ‘These are from four to six inches in 
diameter, of a light rose color, inclining to white, and are produced 
in succession, like the Hollyhocks of the gardens. They may be 
found in the marsh about half a mile from Sturgeon Creek Bridge, 
at the entrance to the Point, and to the left of the road. They were 
in full bloom July 30th, 1892. Later in the season fine patches of 
them were seen in the marshes on Pelee Island, and on marshy 
islands in Detroit River. Another herbaceous plant, with a very 
limited range in Ontario, is the Wild Potato Vine, or Man-of-the- 
Earth (Zdomea pandurata). ‘This plant often produces a huge root 
that frequently weighs ten or twenty pounds. This species was 
found in sandy fields near the southern extremity of the Point, and 
it was afterwards found in sand on the southern point of Pelee Island, 
and is doubtless a drift immigrant from the other side of Lake Hrie. 
Another species found on the sand hills is the Honey Locust, or 
Three-thorned Acacia (Gleditschia triacanthos), which has certainly 
drifted across, as its great pods would drift for months without break- 
ing up. Many of the trees were of a very fair size, and in some 
cases were amongst the Red Cedar, showing that they were not new 
arrivals. The same tree was observed on Pelee Island at the south 
end, and under the same conditions. 
Another rare, and, in some respects, peculiar species, which is 
found on the Point, is the Shrubby Trefoil, or Hop Tree. This tall 
and beautiful shrub grows in the drifted sand of the Point, and also 
on the southern extremity of Pelee Island, and -undoubtedly drifted 
from the south side of Lake Erie, as its fruit grows in great bunches. 
Each being first surrounded by a wing like an elm seed, but 
much larger, would be exceedingly buoyant and float any distance. 
The soil around Leamington is variable in character, but west- 
ward of the road to Pelee Point is rather sandy, and hence supports 
a series of southern forms not often found: in such numbers. Grow- 
ing in profusion south of the railway, and west of the road leading 
to the wharf, were gathered /olygala incarnata, Solidago rigida, 
Baptisia tinctoria, Lechea major, Anychia adichotoma, Desmodium 
ciliare, rotundifolium and canescens, and many others. Ina swamp 
