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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 purple veins and
center
1" 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 1-4' tall with a fleshy tap root
Reproduces by seeds
All parts are highly poisonous but the foliage is unpalatable and
seldom grazed
Black henbane was introduced from Eurasia as a medicinal species
Has historic medicinal use at controlled doses and has also been
used as an ornamental
Grows on roadsides, waste areas and in pastures
Control
Prevention – Learn to
identify plants; know your 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 avoid seed set; bag and
dispose of seed capsules if mature
Chemical – Several
effective at label rates; generally easier to control when young, before
the stalk(s) elongate;
refer to the
PNW Weed Management Handbook for specific chemical recommendations |
rosette
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