Stevens County Noxious Weed Control Board
This web site will help you identify & control noxious weed with information and photographs to aid you.

Home Weed List More Weeds Programs Staff/Board
New(s) Map to Office Cities and Areas Glossary Credits& Links

Cynoglossum officinale L.              
Borage family

Key identifying traits

  • Leaves are hairy, have distinct veins and are shaped like a hound’s tongue
  • Leaves alternate, up to 12" long and 3" wide on lower stem and lesser in size higher up the stem
  • Flowers are small, attractive, reddish-purple and terminal on outwardly drooping stems
  • Seed pods are about the size and shape of a split pea with hooked prickles that cling to clothing and animals

Biology and ecology

  • A tap rooted biennial growing 1 to 4 feet tall the second year
  • Found in pastures, disturbed areas and roadsides
  • Can cause liver damage in animals resulting in death 6 months after a lethal dose is consumed
  • Sheep less often poisoned than cattle and horses
  • Tolerates shade but more robust in sunlight
  • Four nutlets break apart readily into single seeds


Prevention – Learn to identify plants; know your property; beware of seeds clinging to clothing or animals and of hay and seed from outside your area

Biological – None available to date, but a promising agent may be available very soon…

Cultural – Good vigorous grass cover will prevent heavy weed growth but not totally prevent it

Mechanical – Will not withstand regular cultivation, digging, pulling and cutting are effective if done frequently; if done after flowering, plants need to be removed from site and disposed of to prevent seed spread.  Always wear gloves!

Chemical – Several effective at label rates: adjuvant helpful due to hairy leaf structure; refer to the PNW Weed Management Handbook for specific chemical recommendations

bushy plant pre-flower

ht3.jpg (16620 bytes)
unripe seeds

flowering plants

Where found –
Scattered throughout Stevens County particularly where spread by domestic animals or livestock or, in a few instances, as an ornamental.

MSdoc     pdf
Last Edit: March 25, 2015

Home ] Up ]

Questions or Comments About This Web Design