We were at a National Wildlife Federation Conference in Denver many years ago and took a class called "Nature Creeping". We crawled around on the ground for an hour in different habitats and observed a lot of really neat stuff. We should all remember to do that more.
Anagallis arvensis & ssp. foemina
The following information is taken from Wikipedia:
The scarlet pimpernel (Anagallis arvensis) also known as the red pimpernel, red chickweed, poorman's barometer, shepherd's weather glass, or shepherd's clock) is a low-growing, annual plant in the family Myrsinaceae.
The barometer (weather glass) common names have their origin in the fact that the flowers close when atmospheric pressure decreases, and bad weather is approaching.
It is generally considered a weed and is an indicator of light soils.
The stems are about 45 cm long and generally prostrate. The bright green ovate sessile leaves grow opposite. The ¼" orange flowers grow in the leaf axils from spring till autumn. The petal margin is somewhat crenate.
The subspecies Anagallis arvensis ssp. foemina has bright, deep blue flowers. Many botanist consider it a species on its own, namely Anagallis foemina.
It is most noted for being the emblem of the fictional hero The Scarlet Pimpernel.
Troy & Martha