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Canada goldenrod

Solidago canadensis
Asteraceae

New shoots early May
Slender young stems mid-May
Leafy stems late June
Growing tip and leaves late June
Leaves turning color late September
Pendulous spray of flower heads late September
Close-up of flower heads
Bumblebee visiting flower heads late September
Seed heads mid-November

The Canada goldenrod is indigenous to north-eastern and north-central North America but is considered invasive in other parts of the continent, as well as in Asia and Europe.  It is often one of the first species to colonize an area after the original vegetation has been disturbed.  However, despite its ability to propagate by underground rhizomes, it does not persist after shrubs and trees become established because it does not grow as well in shade.

At Salter Grove it can be found along the Upland Trail where it grows as a clump on the edge of woodland, or in well-lit areas of the understory.

Experimental studies indicate that this species inhibits the growth of maple seedlings and possibly other plants as well because its roots produce phytotoxic chemicals.  In China, its aggressive growth has contributed to the local extinction of many local species and the reduction of orange harvests.

The leaves and blossoms of the Canada goldenrod are still used to make an infusion that reduces stomach gas, and that encourages sweating to bring down a fever.  The fresh blossoms are chewed to relieve a sore throat.