150 SECT. XV.— PLANTS NOXIOUS IN AGRICULTURE.

■709.

"Brakes

.

Pteris aquilina.

■710.

Clown's Woundwort

_

Stachys palustris.

Til.

Cajnmock

.

Ononis arvensis.

712.

Coltsfoot

-

Tussilago Farfara.

■713.

C'r^wf otj creeping

-

Ranunculus repens.

714.

Goutweed

-

iF.gopodium Pudagraria

■715.

Grass, Garden Conch

-

Triticum repens.

■716.

------, Conchy-bent

-

Agrosiis stolonifera.

717.

------. Couch Oat, or Knot

-

Avena elatior.

718.

------, Creeping-soft

-

Holcus mollis.

719.

Horseiail, Corn

-

Equisetum arvense.

721).

Persiearia, willow-leaved

-

Polygonum amphibium.

721.

Rest Harrow -

-

Ononis spinosa.

722

Sow-Thistle, Corn

-

Sonchn-- arven^is.

723

Spatiing Poppy

-

Cueubalus Behen.

724

s ing ng-Nettle, large

-

Uitica dioica.

725.

Silyerweed

-

Potentilla anserina.

726.

Sneexewort

-

Achillea Ptarmica.

727.

Thistle, melancholy

-

Carduus heterophyllui.

788.

-

■-~—— aivensis.

7^9

Water Horehound

-

Lycopus europceus.

Perennial Weeds.

Tsis enumeration of noxious plants contains principally those which,although they are very troublesome, are more easy of extirpationthan the last: for although the most of them are perennial, yet, astheir roots do not spread as those of the above list do, they are to beeffectually removed by taking up the plants by their roots. It should,however, be always noticed, that it is to little account to endeavourto clear any land of such incumbrances, if any waste places which areseparated only by a hedge are allowed to grow these things with im-parity ; for the seeds will invariably find their way. The contrivanceof nature in their formation is a curious and pleasant subject for thephilosophical botanist; at the same time it is one of those curses whichwas impelled on human labour.

710. Butter-bur73!. Burdock

- Tussilago Petavitei.

- Arctium Lajjpa.