Galinsoga aristulata E.P. Bicknell
Galinsoga bicolorata H. St. John & D. White
Galinsoga caracasana (DC.) Sch. Bip.
Galinsoga ciliata (Raf.) S.F. Blake
Galinsoga quadriradiata Cav. Hairy galinsoga, shaggy soldier
Hairy galinsoga is a widespread weed that is easily overlooked, with small flowers and few distinctive features, unless you are a farmer and it is ruining your crop yields. These inconspicuous weeds can reduce crop yields by 50%. They are believed to have originated in Mexico. Identification: Plants are 4-31″ (10-80 cm) high, often branched; stems are covered with short hairs. Leaves are opposite, medium to dark green, and up to 2″ (6 cm) × 1½″ (4 cm). They are broadest at the base, tapering to a tip, sparsely to densely hairy, and coarsely toothed. Flowers are ¼-⅜″ (6.3-10 mm) in diameter, with 4 or 5 petals, each with three teeth; and a central yellow disk. Fruits are small achenes with little plumes. References:
Old, Richard, 1200 Weeds of North America DVD, XID Services, Inc., 2012 Online References:
Galinsoga aristulata E.P. Bicknell Galinsoga bicolorata H. St. John & D. White Galinsoga caracasana (DC.) Sch. Bip. Galinsoga ciliata (Raf.) S.F. Blake
Galinsoga quadriradiata description by Thomas H. Kent, last updated 25 May 2020. |
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