Pimpernel
(Anagallis), a genus of plants belonging to the natural order Primulaceæ. The A. arvensis, or field pimpernel, a beautiful annual, is commonly known as the "shepherd's or poor man's weather glass," from the fact that its flowers do not open in rainy weather.
The bog pimpernel (Anagallis tenella) grows in the drier parts of marshes.
The blue and lilac varieties of the A. collina, originally a native of South Africa, have been introduced into gardens in Great Britain, where they have a fine effect. The water pimpernel is the Veronica A.; the yellow pimpernel, Lysimachia nemorum.