. The Indiana weed book. Weeds. WEEDS OF THE PEA FAMILY. 91 Seventeen species of these tick-trefoils axe known from the State, two or three of which are trailing, the others erect. All have purplish flowers and jointed pods, the joints varying much in number, form, size and adhesiveness. (Fig. 14, I.) All are vile weeds commonly known as "seed ticks,'' though no one of them is as common as the hoary species above described. Of them Tho- reau has written: "Though you were running for your life they would have time to catch and cling to your clothes. They will even cling to your hand a
. The Indiana weed book. Weeds. WEEDS OF THE PEA FAMILY. 91 Seventeen species of these tick-trefoils axe known from the State, two or three of which are trailing, the others erect. All have purplish flowers and jointed pods, the joints varying much in number, form, size and adhesiveness. (Fig. 14, I.) All are vile weeds commonly known as "seed ticks,'' though no one of them is as common as the hoary species above described. Of them Tho- reau has written: "Though you were running for your life they would have time to catch and cling to your clothes. They will even cling to your hand as you go by. They cling like babes to a mother's breast, by instinct. I have often found myself covered, as it were, with an imbricated coat of the brown seeds or a bristling chevaux-de-frise of beg- gars' ticks and had to spend a quarter of an hour or more in (After some convenient spot picking them off; and so they get just what they wanted, deposited in some other place. Growing on some rough cliff side, how surely they prophesy the coming of the trav- eler, brute or human, that will transport their seeds on his coat.' '*. Fig. 57. Single joint of pod shown below. Britton and Brown.) The Spurge Family.—EUPHORBIACEtE. Herbs with a milky, acrid juice and small flowers, usually with- out petals, the sexes of which are often bo«ne on separate plants or on different parts of the same plant: leaves variable in form., size, and position on the stems. Flowers, in most of our weeds, within or above a cup-shaped involucre of leaf-like bracts which are often colored, these involucres usually bearing naked glands. Fruit mostly a 3-lobed capsule, each cell of which contains a single seed. A large family, mostly represented in the tropics. The castor- oil plant and various species of crotons, grown for their showy leaves and bracts, are cultivated examples. About 20 species grow wild in Indiana, several of them forming mat plants or disks of much branched vegetation similar to the carp
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1912
