. Field and woodland plants. withliooked bristles; andthe leaves are lanceo-late and are numerousheads of flowers, aboutan inch in diameter,usually arranged in acorymb, but some-times in an umbel, andthere are bracts on thepeduncles. The Strong-scentedor Acrid Lettuce {Lac-tuca virosa) is moder-ately common on drywastes. It is an acrid,glaucous, leafy andprickly plant, with amilky juice. Its erectstem grows to a heightof three or four leaves are sjjread-ing, obovate in form,with toothed margins,and biistlyhau-s on theunder side of themidrib. The lower leaves are frequent
. Field and woodland plants. withliooked bristles; andthe leaves are lanceo-late and are numerousheads of flowers, aboutan inch in diameter,usually arranged in acorymb, but some-times in an umbel, andthere are bracts on thepeduncles. The Strong-scentedor Acrid Lettuce {Lac-tuca virosa) is moder-ately common on drywastes. It is an acrid,glaucous, leafy andprickly plant, with amilky juice. Its erectstem grows to a heightof three or four leaves are sjjread-ing, obovate in form,with toothed margins,and biistlyhau-s on theunder side of themidrib. The lower leaves are frequently marked with dark spots,and the upper ones have pointed auricles which clasp the heads of flowers are small, pale yellow, and arranged in a loose,spreading panicle. The bracts overlap, the outer ones being shorter,and the receptacle is flat. Each head contains only a few fruit is flattened, black, with a beak as long as itself and apajjpus of many simple hairs. T\w flowers appear during Julyand The Hawkweed picrtp. WASTES AND WAYSIDES IN SUMMER 179 Another Lettuce, known as the Prickly Lettuce {L. Scariola), issomewhat rare. It is really less prickly than the last species, butis equally tall, and flowers during the same months. Its leavesare erect, lanceo-late, sagittate,with a wavy mar-gin ;and the upperones clasp thestem. The fruitof this species is ofa greyish colour,and has a beak ofthe same length. Two specieso f Sow-thistle(genus Sonclms)are includedamong our way-side are erect,succulent plants,from two to threefeet in height,with a milkyjuice, and eithertoothed or pinna-tifid leaves. Thenflower-heads areyellow, arrangedin a corymb, andbloom dming thewhole of the sum-mer. Each lieadis surrounded byseveral rows ofoverlappingbracts, and the receptacle is flat and The fruits areconsiderably flattened, without beaks ; and the pappus consistsof several rows of fine, silky, unbranched hairs. One species is known as the Sh
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