Cerastium arvense, the field chickweed, a flowering plant species
The larvae feed upon more than forty different species of plants including but not limited to; Alfalfa, Aster, Blueberry, Chickweed, Clover, Corn, Dock, Flax, Goldenrod, miscellaneous garden vegetables, Grasses, Mullein, Oats, Raspberry, Rye, Tobacco, and Wheat.
The most obvious is the "book of dreams", which appears in Bad Ronald and The View from Chickweed's Window, prior to being featured in The Book of Dreams.
He discovered several rare plants growing on the serpentine rocks on Unst, including the endemic Shetland Mouse-ear Cerastium nigrescens, known as Edmondston's Chickweed on the island.