no good derived from this practice. No plant requires, or in fact
deserves, better cultivation than this, and few plants yield less if
badly managed.



49. MEDICAGO lupulina. TREFOIL, or NONSUCH.--A biennial plant, very
usefully cultivated with Rye-grass and Clover for forming artificial
meadows. Trefoil when left on the ground will seed, and these will
readily grow and renew the plant successively; which has caused some
persons to suppose it to be perennial. About eight or ten pounds of seed
are usually sown with six or eight pecks of Rye-grass for an acre, under
a crop of Barley or Oats.



50. PLANTAGO lanceolata. RIB-GRASS.--This is a perennial plant, and very
usefully grown, either mixed with grasses or sometimes alone: it will
thrive in any soil, and particularly in rocky situations. It is much
grown on the hills in Wales, where by its roots spreading from stone to
stone it is often found to prevent the soil from being washed off, and
has been known to keep a large district fertile which would otherwise be
only bare rock. Sheep are particularly fond of it. About four pounds
sown with other seeds for pasture, will render a benefit in any
situation that wants it. Twenty-four pounds is usually sown on an acre
when intended for the sole crop, and sown under corn.



51. POTERIUM Sanguisorba. BURNET.--This plant grows in calcareous soils,