Several years ago, mom gave me a sweatshirt advertising
Hooker, Oklahoma, as the Tumbleweed Capital of the world. After a recent drive
across the Oklahoma and Texas Panhandle, I’m certain Hooker is not the only
center point of Russian thistle abundance. Winds that day blew an average of 40
mph so we saw droves of prickly Russian immigrants racing pell-mell across
three states. Fence lines trapped enough to fuel miles of potential prairie
fire. Clearly, this transplant’s adjusted well to arid western soils.
These herbaceous invaders adapted to the Great Plains
environment better than many homo sapien immigrants who hit American shores
during the same era. The tumbleweed’s human counterparts often left for easier
pickings that included more moisture and less wind. This forb, however, took root
and multiplied like creatures mentioned in biblical plagues. It prefers disturbed
soil—so farmers breaking virgin grassland and then abandoning their efforts
unintentionally supported the hardy newcomer. Aridity doesn’t hurt them, and winds
strong enough to deform trees and make flags fly at 90 degree angles guarantees
each plant sows its 250,000 seeds.
Think of that--one plant produces several hundred thousand potential
offspring. Scientists have documented how many actually take root, mature, and
reproduce. By the 1890s, researchers reported the first of these Ukrainian
hitchhikers arrived in Scotland, South Dakota, in the 1870s. Before 1900, the
government assigned U.S. botanist Lyster Hoxey Dewey to investigate this curse
to western agriculturists. Dewey, wrote, “The rapidity with which the Russian thistle has
spread, both in infesting new territory and in thoroughly covering that already
infested, far exceeds that of any weed known in America.” According to writer
Doug Main, the only two states that don’t have tumbleweeds are Alaska and
Florida. That’s a record-breaking invasion!
The day I drove across the Panhandle, herds of rolling
thistles bounded over barbwire fences, surging across roads. This dark force
made me think of millions of roaming bison 150 years ago. Due to sheer size,
these mammals halted train travel. The tumbling seed-sowers I encountered didn’t
halt traffic, but they slowed it.
Due to wind speeds, thorny orbs, small and large, rocketed
across flat grasslands. I was glad to travel protected in a vehicle and not
afoot like pastured cattle or wild critters. A thistle scouring of this
magnitude would leave a being picking stickers for weeks. Unfortunately, these
dried plants came in numbers so enormous I couldn’t avoid whacking one after
another and dragged several beneath my vehicle until friction shattered and
scattered them.
While I smacked some, others slammed into the sides of my
Toyota hard enough I felt vibrations through the steering wheel. I’d like to
think these collisions halted their seed dispersion, but that’s a vain wish. In
fact, I’ve probably introduced Oklahoma thistle DNA to Kansas varieties.
Hookerites may disagree, but that sweatshirt’s claim to fame
limits the scope of this invasive plant. The entire Great Plains is the Tumbleweed
Capital of America.
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