Across the cap belong to Agaricus arvensis, called from its large size and coarse texture the horse mushroom, which grows in meadows and damp shady places, and though generally wholesome is coarse and sometimes indigestible.
Arvensis, is probably a variety of the pasture mushroom; it grows in rings in woody places and under trees and hedges in meadows; it has a large scaly round cap, and the flesh quickly changes to buff or brown when cut or broken; the stem too is hollow.
The following plants, in England, are calcifuge: Lastraea Oreopteris, Holcus niollis, Carex ech-inala, Spergula arvensis, Polygala serpyllacea, Cytisu~
The creeping or trailing type is a common one, as in the English bindweed (Convolvulus arvensis), which has also a tendency to climb, and Calystegia Soldanella, the sea-bindweed, the long creeping stem of which forms a sandbinder on English seashores; a widespread and efficient tropical sand-binder is Ipomaea Pes-Caprae.
Convolvulus arvensis (bindweed) is a pest in fields and gardens on account of its wide-spreading underground stem, and many of the dodders (Cuscuta) cause damage to crops.
- Mentha arvensis, var.
The plants are herbs, sometimes annual as in pimpernel (Anagallis arvensis) (fig.
- Anagallis arvensis (pimpernel).