ich is found in old hot-beds and in meadow
lands.

Various methods have been lately devised for raising mushrooms
artificially: but none seem to be equal to those raised in beds, as is
described in all our books of gardening. Raising this vegetable in close
rooms by fire heat has been found to produce them with a bad flavour;
and they are not considered so wholesome as those grown in the open air,
or when that element is admitted at times freely to the beds.

451. MUSTARD, WHITE. Sinapis alba.--This is sown early in the spring; to
be eaten as salad with cress and other things of the like nature; it is
of easy culture. A salad of this kind may be readily raised on a piece
of thick woollen-cloth, if the seeds are strewed thereon and kept damp;
a convenient mode practised at sea on long voyages. Cress and rap may be
raised in the same manner.

452. ONION. Allium oleraceum.--The kinds of onions in cultivation are,

The Deptford. The Reading. The White Spanish. The Portugal. The Globe,
and The Silver skinned.

All these varieties are usually sown in the spring of the year, and are
good either eaten in their young state, or after they are dried in the
winter. The silver skinned kind is mostly in use for pickling. The globe
and Deptford kinds are remarkable for keeping late in the spring. A
portion of all the other sorts should be sown, as they are all very
good, and some kinds will keep, when others will not.

453. ONION, WELSH. Allium fistulosum.--This is sown in August for the
sake of the young plants, which are useful in winter salads, and are
more hardy than the other cultivated sorts.

454. PARSLEY. Petroselium vulgare.--A well known potherb sown in the
spring; and the plants, if not suffered to go to seed, will last two
years. See aethusa Cynapium, in Poisonous Plants.

455. PARSNEP. Pastinaca sativa.--This is a well known esculent root, and
is raised by sowing the seeds in the spring.

456. PEA. Pisum sativum.--This is a well known dainty at our tables
during spring and summer. The varieties in cultivation are,

Turner's Early Frame. Early Charlton. Golden Hotspur. Double Dwarf.

These are usually sown in November and December, and will succeed each
other in ripening in June, if the season is fine, and afford a crop all
that month.

The Dwarf Marrow-fat. The Royal Dwarf. The Prussia Blue. The Spanish
Dwarf.

These varieties are usually sown in gardens when it is not convenient to