Hitchhiking for survival

Hitchhiking for survival

Burdock hitching a ride • Plant Image Library (CC BY-SA 2.0)

Originally published 10 November 1986

This is the sea­son of the grab­bers and clingers. I came home from a walk in the woods with enough seeds stuck to my clothes to start my own weed patch. Bloom time for the wild­flow­ers is past; now is the time when the seeds go traveling.

On the sleeves and the tail of my shirt were a dozen burrs of the bur­dock. Who­ev­er invent­ed Vel­cro must have been look­ing at this tena­cious plant. The mar­ble-sized burrs have hun­dreds of hooked barbs the cling stub­born­ly to cloth­ing, or even to skin. In a soft­er sea­son, each barb was a bract beneath the flower of the plant. Attached to each lit­tle hook is a sheath that con­tains a seed. Pull the burr off your cloth­ing and the sheaths sep­a­rate — and the seeds go flying.

It’s an effec­tive strat­e­gy for get­ting around, and the bur­dock isn’t the only plant that uses it. Down around my ankles there was anoth­er hitch­hik­ing pop­u­la­tion of seeds — the “ticks” of the beg­gar-ticks. A more descrip­tive name for the plant is stick­tight. Each seed of the stick­tight has a hard coat equipped with two or three tiny har­poons, thin spines with back­ward-direct­ed barbs that pen­e­trate and cling to any­thing that brush­es against them. At this time of the year, the plant is incon­spic­u­ous, but a walk through a field can leave you pierced with more har­poons than Moby Dick.

Seeds on the move

I also col­lect­ed a few seeds of the tick-tre­foil, anoth­er class of pants-clingers that are hard­er to remove than paint. The seed pods of the tick-tre­foil break eas­i­ly into seg­ments, and each seg­ment is cov­ered with fine hooked hairs. These lit­tle pack­ets seem so per­fect­ly designed to attach them­selves to cloth that one won­ders how the plant man­aged to dis­perse its seeds before peo­ple start­ed wear­ing clothes.

The grab­bers and the clingers aren’t the only seeds on the move. The milk­weed, this­tle, cat­tail and gold­en­rod fill the air with para­chutes. I came home from my walk trail­ing clouds of tuft­ed seeds behind me. And I haven’t for­got­ten the touch-me-not. A walk through a patch of touch-me-not is like tra­vers­ing a bat­tle­field raked by gun­fire. The lit­tle spring-loaded seed pods explode when touched to hurl their con­tents in every direction.

Seeds on the sleeve, seeds on the wind, seeds cat­a­pult­ed through the air; there’s no end to the tricks these plants have con­trived to spread them­selves around. The lowli­est weeds are prodi­gious­ly cre­ative when it comes to dis­pers­ing them­selves over the countryside.

And not just the coun­try­side. Half of the weeds of New Eng­land made it here by cross­ing the Atlantic. Many of the last wild­flow­ers of the sea­son — Queen Anne’s lace, lady’s thumb, but­ter-and-eggs, catch­fly, hawk­weed, chick­o­ry, the com­mon dan­de­lion — are immi­grants to our area. Some of these plants prob­a­bly arrived with the Mayflower. No soon­er had Miles Stan­dish stepped down from Ply­mouth Rock than chick­weeds, mulleins, and sting­ing net­tles were spring­ing up at this feet. The Indi­ans called plain­tain “Eng­lish­man’s foot” because it seemed to mag­i­cal­ly appear whereev­er the colonists walked.

Weeds and wildflowers

As ear­ly as 1672, John Jos­se­lyn record­ed 40 kinds of weeds that had “sprung up since the Eng­lish plant­ed and kept cat­tle in New Eng­land.” Daisies, clover, bounc­ing Bet, and most but­ter­cups came in with the cows, and although they may be one man’s weeds, they are my flow­ers. A weed is just a wild­flower that hap­pens to be in an incon­ve­nient place. Half of the wild­flow­ers in my Peter­son­’s Wild­flower Guide are prob­a­bly more appro­pri­ate­ly called weeds, and most of them are aliens.

Out of the holds of ships, on the hides of cat­tle, in the seeds of crop plants, in bed­ding straw, in food­stuffs, snagged in the cloth of Gov­er­nor Brad­ford’s cloak and stock­ings, they came, the seeds of Euro­pean weeds, waft­ing and leap­ing or catch­ing on and hold­ing tight to find new worlds to con­quer. Many plants new to this coun­try first sprout­ed up along­side wharves and ship­yards. From there they made their way inland along roads and canals and rail­road embank­ments, and took up res­i­dence in any sort of dis­turbed soil. Native plants accus­tomed to qui­et pre­colo­nial forests could give lit­tle com­pe­ti­tion to the aggres­sive intruders.

In her won­der­ful book, The Chang­ing Face of New Eng­land, Bet­ty Flan­ders Thom­son ask this ques­tion: “What makes a weed suc­cess­ful, from a weed’s point of view?” And her answer is this: To make its way on open soil against the vig­i­lant efforts of gar­den­ers and farm­ers, a plant must bear seeds in abun­dance, have a built-in means of trans­porta­tion, grow quick­ly and, if pos­si­ble, flower and mature its seeds before it has made itself con­spic­u­ous. It is a clas­sic design for an irre­sistible infiltration.

I’m not a farmer or a gar­den­er. Stick­tights and cat­tails are an accept­able part of my envi­ron­ment, and I’m glad to play my role in help­ing them get around. Any pil­grim plant that wants to make use of my coat­tails is welcome.

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