Myosotis arvensis or field forget-me-not is a herbaceous annual to short lived perennial flowering plant in the family Boraginaceae.

Clive Stace describes this plant as having the following characteristics:^[1]^: 564

Upright, to 40 centimetres (16 in); softly hairy, with hairs at more-or-less right-angles to the stem.
Flowers grey-blue, 3–5 millimetres (1⁄8–13⁄64 in) across, saucer shaped in profile; sepal tube with hooked hairs; April–October.^[2]^: 208
Mature fruit dark brown, shiny.
Mature calyx on spreading stalks longer than sepal tube; calyx teeth conceal the ripe fruit.
Basal leaves stalked, in a rosette; upper leaves not stalked.
Generally found on open, well drained ground; common throughout the British Isles.

Gallery

General view
Flower head
Close up of flower; the background squares are 5mm across
Close up showing sepal tube; the background squares are 5 millimetres (13⁄64 in) across
Mature fruit - side 1; the background squares are 5 millimetres (13⁄64 in) across
Mature fruit - side 2; the background squares are 5 millimetres (13⁄64 in) across
Mature calyx showing fruit is hidden inside; the background squares are 5 millimetres (13⁄64 in) across
Mature calyx showing calyx stalk longer than sepal tube; the background squares are 5 millimetres (13⁄64 in) across
Close up showing non-basal leaf

References

^ Stace, Clive (2011). New Flora of the British Isles (Third ed.). cambridge, U.K.: Cambridge University Press. ISBN 9780521707725.
^ Blamey, M.; Fitter, R.; Fitter, A (2003). Wild flowers of Britain and Ireland: The Complete Guide to the British and Irish Flora. London: A & C Black. ISBN 978-1408179505.

Myosotis arvensis

Myosotis scorpioides var. arvensis