Twin Island F (Big Twin)

View of north shore of Twin Islands F on left and G on right

Note

Island camping has been prohibited since around 2003

The 2000 flora and fauna summary

This island witnesses the most human disturbance as campers have created a trail system, built a board and pit privy, and fire pits at tent sites.

The island is well treed with a good diversity of herbs. An understory of American Basswood, mostly shrub sized, was in contrast to Green Island and Island G where this species was absent. Also, Trembling Aspen was present here. Some of the interesting herb species were found along the rocky shoreline where they clung to a foothold: Common Bearberry, Pale Corydalis and Fragrant Cudweed were interesting finds.

A rare butterfly for Renfrew County was the Satyr Comma (Polygonia satyrus) spotted on Island F on July 13. This butterfly was known until this year by old specimens in a local collection (Michener, 2000). This was the first I had seen and lent some excitement to the day!

Island "F" Plant Survey

OPLID

108

182

264

448

475

572

620

698

705

1057

1385

1861

2020

2021

2089

2464

2893

2944

3250

3255

3970

4043

4067

4132

4170

4248

4414

4419

4563

4609

common name

Staghorn Sumac

Spreading Dogbane

Field Pussytoes

Fragrant Cudweed

Field Hawkweed

Goldenrod spp

Common Dandelion

Speckled Alder

White Birch

Larger Mouse-ear Chickweed

Eastern White Cedar

Common Bearberry

Yellow Clover

Large Hop Clover

Pale Corydalis

Northern Water-horehound

Common Evening Primrose

Common Helleborine

Balsam Fir

White Spruce

Juneberry sp

Common Strawberry

Silver Cinquefoil

Smooth Rose

Common Raspberry

Trembling Aspin

Common Mullein

Corn Speedwell

American Yew

Basswood

scientific name

Rhus typhina

Apocynum androsaemifolium

Antennario neglecta

Gnaphalium obtusifolium

Gnaphalium obtusifolium

Solidago spp

Taraxacum officinale

Alnus incana

Betula papyrifera

Cerastium fontanum

Thuja occidentalis

Arctostaphylos uva-ursi

Trifolium aureum

Trifolium campestre

Corydalis sempervirens

Lycopus uniflorus

Oenothera biennis

Epipactis helleborine

Abies balsamea

Picea glauca

Amelanchier sp

Fragaria virginiana

Potentilla argentea

Rosa blanda

Rubus idaeus

Populus tremuloides

Verbascum thapsus

Veronica arvensis

Taxus canadensis

Tilian americana

Introduced

yes

yes

yes

yes

yes

yes

yes

yes

yes

status

c

u

c

u

r

c

c

c

u

u

u

u

u

u

u

u

r

c

u

c

c

u

c

c

u

r

u

u