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Wisteria in bloom

Vines

    Humans gripe about rain; vines rejoice in it. Seattle has lots of happy vines, some 100 feet long or more. They love tremendous rains (we're 8 inches above normal this year) and summer warmth, responding luxuriously. They elongate as if ecstatic.
    Most of Seattle's wild growing vines were brought here from elsewhere and are now naturalized. There are only three native species which have been growing here for thousands of years. Foremost in interest is poison oak (Toxicodendron diversiloba). As a rule, oaks are trees, but poison oak, like poison ivy, is not related to oaks in general, and is a vine of the cashew or sumach family. In Seattle it is rare, apparently confined to Seward Park, Lincoln Park, and west Beacon Hill. It favors hot, dry, well exposed sites. Although blooming now, its flowers are inconspicuous. However, its electric red fall color is breathtakingly beautiful. No part of it be should allowed to touch you or your pets.
    Pink honeysuckle (Lonicera hispidula), and orange honeysuckle (Lonicera ciliosa) are two native vines with colorful flowers and berries. Hummingbirds pollinate them. You can suck the nectar out of the flowers if you beat the birds. Both of these are common in Seattle, but the orange-flowered species is mainly a woodlander, the pink favors open, brushy bluffs. Here and there the European woodbine or honeysuckle (Lonicera Periclymenum) grows wild in Seattle. It smells heavenly, and is not especially weedy, so I consider its presence a blessing, not a curse. In New England, Hall's Japanese honeysuckle (Lonicera japonica) is a serious weed. In Seattle it is a delightful garden plant bearing sweet flowers all summer; it rarely if ever comes up wild.
    Of the wild, non-native vines which can be so aggressive as to gobble acreage, eat houses or swallow trees, the main villains are ivy (Hedera Helix 'Hibernica') and wild clematis (Clematis Vitalba), both from Europe. Ivy makes a lovely smothering carpet of evergreen leaves. Clematis fills ravines and greenbelts, clambering up trees, providing strong stems which children use to play Tarzan. Clematis makes pretty flowers of creamy-white, followed in winter by attractive puffy seed-clusters. Both of these vines are being purged from parks by native plant proponents, in a vegetative version of ethnic cleansing. Moderate growth of non-natives adds beneficial richness to our wild diversity; excessive or cancerous growth clearly decreases diversity. People must referee. So prune your wayward vines.
    Various other vines grow wild occasionally, but are of lesser impact, or rare occurrence. The main ones are wisteria (Wisteria spp.), grapes (Vitis spp.), bittersweet (Celastrus orbiculatus), silver lace vine or fleeceflower (Polygonum Aubertii), and Virginia creeper (Parthenocissus quinquefolius). Less woody or strictly herbaceous vines include wild morning glories or bindweeds (Calystegia sepium and Convolvulus arvensis), bittersweet nightshade (Solanum dulcamara), and hops (Humulus Lupulus).

(originally published in The Seattle Weekly, June 1997)

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Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
Arthur Lee Jacobson plant expert
   

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