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Publications: Noxious Weeds
in Slow Motion: A
talk by Jerry Asher about noxious weeds in the Blue Mountains
Click on a weed to learn about how to find it and kill it!
Alias: Broad-leafed peppergrass, tall whitetop,
- Stems: Up to 6 feet high
- Leaves: 12 inches long, bright green to gray-green, leathery,
toothed to entire. Lower leaves taper to a stalk, upper leaves
reduced in size and sessile, but not clasping. Leaves have prominent
- Flowers: Borne in large dense masses; four sepals and
petals, white, about 1/16-inch long, rounded in outline and flattened,
bearing a few hairs. Flowering period from June to September.
- Seeds: Contained in light reddish-brown fruits, minutely
roughened. Two seeds per fruit.
Perennial pepperweed spreads both from a widely spreading root
system and from seed. It is often found growing in wet areas along
roadsides and ditches. It can invade cropland. It is extremely difficult
to control because of the extensive root system.
Control: Consult with you local weed control office for
information about stopping the spread of this weed.
Report all sightings to your local