Spotted Hemlock (Conium maculatum) grows upon rubbish, hedges, fences, and highways. The stem is three to six feet high, marked with blue and bluish-red spots; the leaves are tripennate; the white blossoms also stand in flat umbels. The leaves when bruised emit a very peculiar mouse-like odor which is very noticeable on hot summer days. The root, especially, is poisonous, and when eaten causes the most fatal consequences. Hemlock is a powerful sedative, and is used medicinally.
Thorn Apple (Datura Stamonium) originally came from the East Indies, but is now widely spread, growing on rubbish and in gardens. Never more than a few plants are found. Its forked stem is from eighteen inches to three feet high; the petiolate leaves are widely serrated; the large blossoms are a pure white; the fruit resembles the horse chestnut, and contains numerous black seeds. The thorn apple has a very repulsive odor, a disagreeable flavor, and is poisonous in all parts. The leaves and seeds are used in medicines.
Water Hemlock (Cicuta virosa), is very common in many localities on the banks of streams, ditches, and in flooded fields; in other localities it is rare. The thick, fleshy root is hollow, and divided in the interior into sections; the upright stem is hollow and smooth; the leaves are tripennate; the small white blossoms are arranged in umbels of ten or more rays. The poison is chiefly contained in the red root, which, when eaten by children, who mistake it for an edible root, nearly always causes death, unless medical aid is immediately at hand. The other parts of the plant also contain a poison, which is so strong that its odor alone will produce headache and giddiness.
Wolf’s-Bane or Monk’s-Hood (Aconitum Lycotonum) is a rare plant from eighteen inches to three feet high; the leaves are shaped like a hand, with three, five or seven lobes. The blossom is yellow. The wolf’s-bane contains a virulent poison, especially in the root and in the seeds. This description also applies to the Aconitum Napellus, which is grown as an ornamental plant in gardens; its tubers are used medicinally.
X. SOME WONDERS OF PLANT LIFE
We usually think of plants as quite harmless things, almost wholly at the mercy of the animal creation. This, however, is only one side of the story, for quite a number of plants have a very cunning plan whereby they entrap flies and other insects. The ingenuity with which these plants lure their victims on to death is simply amazing. Everything is done to tempt the creature to visit the death traps of the plants, and, on the other hand, no means are spared to make an escape impossible.
THE MOST CRUEL PLANT
IN THE WORLD
One of the most singular instances of this is to be seen in a little plant which is only found growing in the bogs of the Carolinas. This has been rather cynically called the Venus Fly Trap (Dionæa muscipula), a fanciful name which hides its cruel practices. Few plants have adopted a more certain plan than the Dionæa. Every leaf which the plant produces is the most perfect device for the securing of prey that could be imagined.
The mechanical construction of this remarkable vegetable trap is somewhat on the following lines. The leaf is borne at the end of a curiously broad stalk, and is divided into two lobes; these are joined together by a hinge-like arrangement. The outside borders of the lobes are fringed with from a dozen to twenty long teeth. When fully expanded the leaf lies back on the moss amid which the plant grows.
If we examine the inside surface of the lobes we shall see that these are in the middle colored a rosy red. Just at this point will be discovered three hairs arranged in triangular fashion.