Grindelia squarrosa (Pursh) Dunal

Grindelia squarrosa plant

Family - Asteraceae

Stems - No info. yet.

Grindelia squarrosa stemStem.

Grindelia squarrosa rootRoot.

Leaves - No info. yet.

Grindelia squarrosa leaf

Inflorescence - No info. yet.

Involucre - No info. yet.

Grindelia squarrosa involucreInvolucre.

Ray flowers - No info. yet.

Disk flowers - No info. yet.

Grindelia squarrosa flowersYoung flower head.

Grindelia squarrosa flowersMature flower head.

Flowering - July - September.

Habitat - Waste ground, roadsides, railroads.

Origin - Native to U.S.

Other info. - This easily identifiable species can be found scattered throughout Missouri but is absent from most of the south and central portions of the state. The plant can be identified by its sticky involucres, stems, and leaves.
There is a variety, variety nuda, which has no ray flowers.
G. squarrosa was used widely by natives to treat a variety of ailments ranging from asthma to cancer. It is also believed to have sedative properties.
The species epithet "squarrosa" refers to the spreading and recurved bracts of the involucre.

Photographs taken in Marquette, MI., 9-5-2003.