ENDOGENOUS PLANTS--INSIDE GROWERS.
Symplocarpus fcelidus. Swamp Cabbage, skunk weed, (p.) A worthless native weed in wet and swampy mea dows, readily known by its skunklike odor when wounded. Saggittaria variabilis. Arrow-head, (p.) A common native plant of no value, found in sluggish ditches and swampy meadows. The roots, or base of stem, often pro duce large oval tubers in autumn, which tempt hogs to root for them, and thus disfigure the grounds on which they occur.
Ancteharis Canadensis. Water-reed. (p.) This slender aquatic is supposed to be indigenous in our sluggish streams, where it often abounds, and may possibly become troublesome in our canals. It has been introduced into England, where its presence impedes the navigation of the canals to a serious extent.
This rotundif oli a. Green Brier, rough bindweed, (p.) This is common in thickets, and a variety of it, S. Caduca, (L.,) often abounds in poor, neglected old fields. Ornithogalum umbellatum. Ten O'clock, (b.) This exotic from the gardens in many places multiplies its bulbs so rapidly as to alarm the farmer, if neglected. The bulbs are exceedingly tenacious of life, and when once in possession of the soil, it is an almost task hopeless to get rid of them.
A///um vinea/e. Field Garlic, crow garl•c, (p.) Tradi tion says this species was introduced by the first Welsh immigrants to Pennsylvania for the purpose of affording an early pasture, particularly for sheep. It was formerly so abundant in some districts as to be quite au annoy ance, by imparting a disgusting flavor to milk and butter, and injuring the manufacture of wheat flour. By good farming and a judicious rotation of crops the evil has been much abated.
Juncos effueis. Common or Soft Rush, (p.) There are numerous species of this worthless native weed, bui this is the and perhaps the most objectionable, as it has a constant tendency to form unsightly hunches, or tussocks, iu moist low gronnds. Mr. Elliott an eminent botanist, says that in South Carolina this Rush occupies and almost covers rice fields us soon as they are thrown out of cultivation.
Cyperus phymatodes. Grass of Florida, (p.) This spe cies is fort .nateiy somewhat rare, as yet, in the northern and middle States, but it is a great pest to the agriculture of the South.
Cy perms hydra. Coco grass, nut grttes of South Caro lina, (p.) This is regarded by the southern planters as the most intolerable pest of their agriculture. Mr. Elliott
says: It shoots from the base of its stem a threadlike fiber, which descends perpendicularly eight to eighteen inches, and then produces a small tnber. From this horizontal fibers extend in every direction, producing new tubers at intervals of six or eight inches; and these immediately shoot up stems to the surface of the earth, and throw out lateral fibers to form a new progeny. This process is interminable, and it is curious to see what a chain of net work of plants and tubers can, with some care, he dug up in a loose soil. The only process yet discovered by which this grass can be extirpai ed is to plow or hoe the spots in which it grows every day throughout the whole season. In their perpetual efforts to throw their leaves to the light the roots become exhausted and perish; or, if a few appear the next spring. they can easily be dug np.
Carex tentaculata. Many-beaked (p.) A very common species, in swampy low gronnd, of the large and unprofitable genus of sedges.
Carex stricta. Tussock Sedge, (p.) This is one of the most common, and most difficolt to manage, of all our sedges. Its roots are apt to form large dense tnfts or tusocks, in swamps. The careful farmers sometimes get rid of those tussocks by digging them out, and, when dry, collecting them in large heaps, burning them, and using the ashes as a manure. Of this remarkable and very numerous genus. (Carex,) Dr. F. Boott, an accom plished botanist of London, has now in hand one of the noblest and most elaborately illustrated monographs ever issued from the press Panicom sa guinale. Crab grass. finger grass, (a.) In the middle States this troublesome grass abounds in gar den.: in the latter part of summer, and is frequent also in Indian corn fields, but they may be kept in tolerable sub jection by the early and faithful nee of the Instrument known as the cultivator. The crab-grass is regarded as a serious pest in the_plantation a along the lower Mississippi. Panteum capillare. Hair-like Panicum, Old Witch grass, (a.) This worthless species flourishes best in a light sandy soil, but is usually more or less abundant in corn-fields. Ia autumn the dry cnlma break off and the light-spreading panicles are rolled over the fields by the winds, until they accumulate in great quantities along fence and hedge rows.