Under magnifier, scum is beautiful

Under magnifier, scum is beautiful

Duckweed • Photo by Patricia Barden (CC BY 2.0)

Originally published 26 September 2000

The angiosperms are the super­stars of the plant world,” says Lynn Mar­gulis in her Five King­doms: An Illus­trat­ed Guide to the Phy­la of Life on Earth.

What the angiosperms have in com­mon is their delight­ful repro­duc­tive organ, the flower — orchids and orange blos­soms, daisies and aza­leas, water lilies and magnolias.

The largest flower blos­som is the titan arum of Suma­tra, 8 feet tall and 4 feet in diam­e­ter. It has a kind of gaudy ele­gance but smells so awful that it’s not on any­one’s list of favorites. The tini­est flow­er­ing plant is a duck­weed that can be found on our New Eng­land ponds. The flower is so small that a mag­ni­fi­er is required to see it, and so rare that, although I have exam­ined a zil­lion of these plants, I haven’t seen one in blos­som yet.

Duck­weed is not exact­ly a super­star of the plant world, but what it lacks in size it makes up for in num­bers. Although each plant is the size of a salt grain, it has a prodi­gious capac­i­ty for repro­duc­tion by bud­ding off copies of itself. My favorite pond is most­ly cov­ered with a pea-green slime of duck­weed, heaped mass­es of grain-sized plants that stream with every breeze into gor­geous swirls and eddies. Ducks cruise the scum, trail­ing clear wakes that slow­ly close to green. Frogs plop into the water; the scum parts and clos­es over them.

I plunge my hand into the duck­weed mat. It comes up in a green glove. Under a mag­ni­fi­er, the fab­ric resolves into myr­i­ad minus­cule lima beans, lit­tle bags of watery goo. Ques­tions come to mind: What do these tiny plants live on? Why do they so reluc­tant­ly flower? How are they pol­li­nat­ed? What crea­tures (besides ducks) graze these watery fields?

The answers, I sup­pose, are find­able. But right now the ques­tions are what’s impor­tant. The ques­tions con­firm the diver­si­ty and resilience of plants, their capac­i­ty to exploit every envi­ron­men­tal niche, to spread them­selves out on every open sur­face of the plan­et so that no sun­beam goes to waste. The duck­weed is one more way life has invent­ed for gar­ner­ing ener­gy from a star.

This is Dar­win’s dream pond, a fresh­wa­ter Sar­gas­so Sea, a primeval are­na of eat and be eat­en. I exam­ine my green glove with the mag­ni­fi­er. I catch glimpses of insect lar­vae, rotifers and who knows what else, hid­ing and feed­ing among the plants. Pro­to­zoans, too, must swarm here, too small to see at this lev­el of mag­ni­fi­ca­tion. The pond scum is as thick­ly pop­u­lat­ed as the African veld.

Tur­tles sun them­selves on what­ev­er sol­id perch pro­trudes above the sur­face of the water. Drag­on­flies dart above the green mat in cop­u­la­to­ry flight, their iri­des­cent bod­ies locked in valen­tine embrace. Mal­lards wad­dle into the muck from the mud­dy bank. On this glo­ri­ous autumn after­noon, I know the pond’s bank is a worth­while place to spend an hour, sens­es open to every sensation.

All that scum, that cov­er­ing of gran­u­lar green, the part­ings and clos­ings, the hiders and graz­ers, speak to us of our own pro­to­plas­mic ori­gins, the pond water of our blood, the ancients urg­ings toward feed­ing and reproduction.

Love, we are a small pond,” says Max­ine Kumin in one of her won­der­ful poems that cel­e­brate New Eng­land nature. It is a deli­cious metaphor: The pond as ten­der affec­tion, touch­ing skin, the scratch­es that leave no scar, the mouths that gob­ble. “The black­est berries fat­ten over the pond of our being,” she writes, exuberantly.

Her poem reminds us: We need to keep in touch with those things — the duck­weed, the ducks, the drag­on­flies, the exu­ber­ant gush of life — lest we for­get what touch and sight and sound and scent are all about. Even love is in dan­ger of being made into a vir­tu­al real­i­ty — those flick­er­ing bits on a TV screen or Inter­net mon­i­tor — stripped of sen­su­al full­ness. Mouths, blood, dry thorns and tight seeds: Kumin’s poem is full of it.

Our draw­ing toward each oth­er was cra­dled in the pond, nur­tured on the tan­gled bank, per­fect­ed in the same urgency of seek and join that caus­es the drag­on­flies to bend their bod­ies into a heart-shaped kiss. The pond is more than a metaphor for our lives; our lives are steeped in it.

I plunge both hands into the duck­weed, bring up two green gloves. In South­east Asia, they eat this stuff. We would eat it, too, if we were less squea­mish. Spread out on the sur­face of the pond, it has an unsa­vory appear­ance. Under the mag­ni­fi­er, each tiny plant looks like a juicy grape writ small and not at all unpalat­able. All part of the same tan­gled web of life that scums the plan­et — and that con­tains in its prodi­gious diver­si­ty even the “black­est berries” of our love.

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