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Key identifying traits
Early season rosette resembles dandelion leaves
Inconspicuous stem leaves cause skeleton-like plant appearance
and hence the common name
Course hairs on lower 4 to 6 inches of stem
Yellow, ¾ inch flowers are inconspicuous and widely scattered
along length of stems
Cut stems and leaves exude milky juice (sap)
Flower petals number from 7-15 and are squared across the end
with tiny lobes or teeth
Biology and ecology
Perennial, multi-stemmed, 1 to 4 feet tall
Reproduces by seed and by lateral root buds
Parachute like seeds easily spread by wind
Extensive deep roots make control difficult
Inhabits well drained, light textured soils
Found in roadsides, fields, range and pasture
Soil disturbance aids establishment
Flowers mid July through frost
Control
Prevention – Learn to
identify plants; know your property; beware of fill dirt, hay and
seed from outside your area
Biological
– Gall midge, Gall mite and rust all well
established in Stevens County and effective in limiting density
and seed production
Cultural – Good vegetation inhibits establishment
Mechanical – Repeated effort required because of
extensive roots and re-growth from roots and seeds
Chemical – Some are effective at label rates,
particularly if applied to young growth and repeated on regrowth;
fall applications can be very effective with a residual
herbicide.
Refer to the
PNW Weed Management Handbook for specific chemical recommendations |
basal leaves & stem
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