Tall Teasel, Prickly Roadside Weed
I’d be curious to know how many of you recognize this other-worldly plant from roadsides near your home. It’s found just about everywhere now, an alien from Europe, around since the 1700s. Of course, you’re not likely to notice it if your travels are at high speeds on interstates or even on highways.
But if your trips to and from work and home and the local store are, like ours, on back roads in the county, then you’re likely to have noticed this not-inconspicuous prickly plant–often dense, always tall (six feet or more) and stiff-looking, especially when the purple or white flowers have gone by.
Do NOT try to pick this one like you’d pluck a daisy. The spines along the stem are stout and sharp. I’m guessing cattle tend to leave it alone, accounting for it’s prevalence along pasture margins and fence rows–like where I found this patch.
In growth form, this plant’s flower type (or inflorescence, a term you’ve heard me use) is a HEAD–characteristic of the Aster family, and closely related. Flowers on the inflorescence begin maturing in the middle and “ripen” both upward and downward, which is unusual. The dried head persists, like a scepter–and I plan to cut some for our old butter churn that sits in the hallway upstairs, just because I like their shapes.
Speaking of form, there is a relationship here to function. A close relative of our common Dipsacus (species sylvestris) was used for its recurved spines “in textile processing, providing a natural comb for cleaning, aligning and raising the nap on fabrics, particularly wool. It differs from the wild type in having stouter, somewhat recurved spines on the seed heads. The dried flower heads were attached to spindles, wheels, or cylinders, sometimes called teasel frames, to raise the nap on fabrics (that is, to tease the fibers). ”
Now that you’ve seen it, I’ll bet somebody will write to say “It’s everywhere and I’d missed it until you made me look.” Isn’t it interesting how, once we have our threshold of awareness lowered to something that was invisible to use, we see it often and close by?