Ontario Weeds: Yellow foxtail
Table of Contents
- Name
- Other Names
- Family
- General Description
- Stems and Roots
- Flowers and Fruit
- Habitat
- Similar Species
- For more information...
Name: Yellow foxtail, Setaria glauca
(L.) Beauv.,
Other Names: sétaire glauque, Bottle
brush, Bottle grass, Bristle grass, Millet, Pigeon grass, Wild millet,
sétaire jaune, foin sauvage, mil sauvage, Setaria lutescens
(Weigel) Hubb.
Family: Grass Family (Gramineae)
General Description: Annual, reproducing
only by seed.
Photos and Pictures
Yellow foxtail.
Yellow foxtail.
Yellow foxtail.
Yellow foxtail. A.
Plant. B. Leaf-base. C. Spike.
Stem and leaf-base characteristics of a typical
grass.
Stems & Roots: In general appearance
similar to Green
foxtail but is characterized by having a few, prominent, silky, kinky
hairs 3-10mm, 1/8-2/5in. long) on the upper surface of the leaf blade
just near the stem; ligule a fringe of hair; no auricles; leaf sheaths
split, their margins smooth, green or slightly membranous and transparent;
stems normally round, but occasionally distinctly flattened; inflorescence
a spike 2-10cm (4/5-4in.) long, covered with numerous, yellow to orange
bristles with forward-pointing barbs.
Flowers & Fruit: Spikelets ("seeds"
or "grains") slightly larger than Green foxtail, more prominently
cross-ridged, and yellowish or straw-coloured. Flowers from July to August.
Habitat: Yellow foxtail occurs throughout
the agricultural regions of Ontario, having essentially the same distribution
as Green foxtail but often being less abundant.
Similar Species: It is distinguished from the
other foxtails and, indeed, from all other grasses in Ontario by the prominent
silky, kinky hairs on the upper surfaces of the leaf blades just near
the stem.
For more information...
... on weed identification, order OMAFRA
Publication 505: Ontario Weeds
... on weed control, order OMAFRA
Publication 75: Guide To Weed Control
...on weeds in field crops, contact Mike Cowbrough (mike.cowbrough@ontario.ca),
Weed Management Specialist (Field Crops), OMAFRA
...on weeds in horticultural crops, contact Kristen Callow (kristen.callow@ontario.ca),
Weed Management Specialist (Hort Crops), OMAFRA
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