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bh by xiaoyounan


									                                  Black henbane
                     Hyoscyamus niger L.                 Nightshade family
Key identifying traits
   Large, coarse, abundant foliage has a fowl odor
   Soft, stalkless leaves are toothed to shallowly
    lobed and have sticky hairs
   Funnel-shaped fused petals are yellow-green with                                               rosette
    purple veins and center
   1 inch long pineapple-shaped seed capsules are in
    two overlapping rows on one side of the stem
   Each capsule has hundreds of tiny black seeds
   Hardened, almost woody seed stalks remain
    standing throughout winter and following spring

Biology and ecology
 Can be an annual or biennial 1 to 4 feet tall with a
  fleshy tap root                                                                                flowering
 Reproduces by seeds
 All parts are highly poisonous but the foliage is
  unpalatable and seldom grazed
 Has historic medicinal use at controlled doses and
  has also been used as an ornamental
 Grows on roadsides, waste areas and in pastures

Prevention – Learn to identify plants; know your                                                 flowers
property; beware of fill dirt, hay and seed from
outside your area
Biological – None known at this time
Cultural – Good vegetative cover substantially reduces
chance of infestation
Mechanical – Will not tolerate cultivation; pulling and
cutting can be very effective if properly timed to                                   seed heads
avoid seed set; bag and dispose of seed capsules if                                  & new
mature                                                                               growth

Chemical – Several effective at label rates; generally
easier to control when young, before the stalk(s)
Where found – Found in several small infestations in the Colville area of Stevens County. Is
found throughout the US and is a common weed in many suitable habitats.

                                       Stevens County Noxious Weed Control Board, June 2001; Updated Jan 2006

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