hairy galinsoga
Scientific Name: Galinsoga ciliate
Other Names: galinsoga cilié, Galinsoga, Quickweed
Family: Composite or Aster Family (Compositae)
General Description: Hairy galinsoga is an annual weed reproducing only by seed.
Habitat: Hairy galinsoga is found throughout southern Ontario especially near towns and cities in gardens, roadside and waste areas.
Seedlings
- Cotyledons are club-shaped, opposite, triangular with slightly toothed margins
- Cotyledons are covered with hairs
- Hypocotyl is very short and green but becomes maroon as it matures
- Stems are erect
- Very branched with opposite branches
- 20-70 cm in height
- Covered with coarse spreading hair
- Leaves are opposite (2 per node)
- Lower leaves have long stalks, upper leaves have very short stalks
- Leafs are oval in shape and pointed towards the tip
- Leaf margins are coarsely toothed
- Flower heads are small (3-7 mm across) on hairy stalks from the axils of leaves
- Ray florets are white with about 5 per head and slightly longer than the yellow-green to white disk florets
- Pappus scales present on both the ray and tubular florets
- Flowers from June to late autumn
Roots and Underground Structures:
- Fibrous root system
With / Distinguishing Features
Hairy galinsoga is distinguished by its opposite, oval and coarsely toothed leaves on opposite-branched stems as well as its small flower heads that each have 5 white tiny rays and a yellow disk.
References
www.weedinfo.ca/en/weed-index/view/id/GASCI
http://weedid.missouri.edu//weedinfo.cfm?weed_id=118
www.omafra.gov.on.ca/english/crops/facts/ontweeds/hairy_galinsoga.htm