DIPETALOUS EXOGENS—THE PETAL MOSTLY TINCT.
Ranunculus bulbosus. Buttercup, bulbous crowfooti(p). This foreigner.is extensively naturalized in grass p ots, meadows, and low ground pastures along our streams, where it is regarded as a nuisance by the farmers. The fleshy bulb is highly acrid, and the plant when once intro duced is difficult t subdue. The most effective remedy yet found ie to get the plant closely depastured in early spring stock, especially sheep. Another perennial species, viz: Raffia, or tall crowfoot, is naturalized in New Englan_ d and is as obn xious as its congener.
consolida. Field Larkspur, (a.) This intro duced plant has strayed from the garden in many places, and is an unwelcome intruder in grain fields sod other cultivated grounds. This and a kindred species (D. adjacis) have become so common in gardens that some attention is requisite to prevent them from trespassing on the farms. Plants which have matured their seeds in the garden should never be c,,rried to the barnyard nor per mitted to mingle with farm manures, otherwise the fields will be speedily infested with worthless andpernicious weeds. A slight plowing after the removal of the crops from the fields will favor the germination of the seeds, which will be destroyed by the regular plowing of the field.
Papaver eubiuni. Field Poppy, (a.) This foreigner has found its way into some districts, and, if unattended to, may become a troublesome weed, as it and the Corn Poppy (P. rhoca8) are in Europe. A similar remark is applicable to the Prickly Mexican Poppy (Argemone Melicana) soother d weed which has been intro duced. This pl ut should be extirpated by hand-weeding before the ripening of the seed. In Italythe prickly poppy became so obnoxious as to be called infernal figs.
Uatnelina 6alira. Wild Flax, gold of pleasure, (a.) A natur lized foreigner, and, where neglected, becoming a gr at nuisance—formerly supposed by the simple and credulous to be a sort of transmuted or degenerate flax. It has been subdued by annual plowing, so managed as to s How the seeds to vegetate, and thus destroy the young plants before the seeds on them are matured.
Capaeila bursa-paatords. Shepherd's purse, (a.) A worthless little intruder from Europe, but the valuable grasses will generally choke out such small weeds.
Raphanus raphanistrum. Wild Radish; jointed char lock, (a.) A naturalized weed, becoming a nuisance in the Northern States. It has already invaded New England and Pennsylvania, and is tending westward. The seeds are contained in a jointed pod, and are thus protected from the severity of frost and concealed from birds until liberated by the process of decay of the pod.
Hypericum perforatum. at. John's Wort, (p.) A foreign weed, formerly an posed to cause cutaneous ulcers in white cows and on horses with white feet and noses; but, the disease disappe .ring, that notion seems to have become obsolete.
Agrostemena githago. Cockle, rose campion, (b.) A well known fore gn weed lufesting wheat fields. The black-coated seeds, when abundant and ground with wheat are iujurioua to the appearance of the flour. The root of this plant should be cut below the surface with a chisel fastened to a long handle and wielded by children. If tide e neglected in the early part of the season, the fields should be scarified immediately after the removal of the crops to favor the germination of the seed, and ultimate dent' by fall ploughing and the frost. The seed obtained from the screening of cereals should not be thrown out upon the manure heap, but fed to fowls, and the refuse left by them should be burned the next day.
avicen nce. Indian Mallow, velvet leaf, (a.) This foreigner, hitherto regarded as a worthless and troublesome intruder in Indian corn fields, potato patches, and other cultivated lots. has been recently announced (together with I moschafos a malvaceous peren nial, native of our maratime marshes,) as yielding a fibrous bark suitable for textile purposes, similar to the Jute of commerce. obtained from Asiatic species of cor chorus, and employed in the manufacture of guuuy bags. The economical value of this material, which is termed Atherican Jute, must be sscertained by experience. Rhus venenata Poison Sumach, poison elder.(e.) A noxious shrub frequent in moist. low grour de, by which many persons are liable to be badly poisoned. A similar cutaneous affection is often produced by the climbing variety of another species--the Rhus toxieod,ndron, Poi son Vine or Oak.