Ontario Weeds: Hairy Galinsoga
Table of Contents
- Name
- Other Names
- Family
- General Description
- Stems and Roots
- Flowers and Fruit
- Habitat
- Similar Species
- Related Links
Name: Hairy galinsoga, Galinsoga ciliata
(Raf.) Blake,
Other Names: galinsoga cilié, Galinsoga,
Quickweed, galinsoga
Family: Composite or Aster Family (Compositae)
General Description: Annual reproducing
only by seed.
Photos and Pictures
Hairy galinsoga (A - plant; B - flower heads).
A. Base of plant. B.Top of flowering plant.
Stems & Roots: Stems erect, often
much-branched with opposite branches (usually 2 per node), 20-70cm
(8-28in.) high, usually covered with coarse spreading hair; leaves
opposite (2 per node), lower ones long-stalked, upper nearly stalkless,
blades oval, pointed towards the tip, coarsely toothed.
Flowers & Fruit: Flower heads small,
about 3-7mm (1/8-¼in.) across on short to long stalks from
axils of leaves, the stalks usually hairy with slightly glandular
hair; ray florets white, small, about 5 per head, only slightly longer
than the yellowish-green to whitish disk florets; pappus-scales present
on both ray and tubular florets and as long as the corolla tubes of
the ray florets. Flowers from June to late autumn.
Habitat: Hairy galinsoga is common throughout
southern Ontario in gardens, roadsides and waste places, especially
near towns and cities.
Similar Species: It is distinguished
by its opposite, oval, coarsely toothed leaves on opposite-branched
stems and its small flower heads each with 5 white tiny rays and a
yellow disk.
Related Links
... on general Weed
topics
... on weed identification, order OMAFRA Publication 505: Ontario Weeds
... on weed control, order OMAFRA Publication 75: Guide To Weed Control
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