Last year I grew a patch of Phacelia, Phacelia tanacetifolia, intending to dig it in as a green manure. In fact I allowed it to flower, not having had the heart to rob bumble bees of this bounteous source of nectar.
Inevitably a few plants self-seeded. I left them to develop and they have begun blooming over the past few days. The flowers of this North American annual form a raceme which curls over like the neck of a violin, giving it the name of Fiddleneck, although it is often simply called Lacy Phacelia or even Blue Tansy. Although 'tanacetifolia' means 'with leaves like Tansy', the two plants are unrelated.
Fiddleneck, Phacelia tanacetifolia, has self-seeded on our allotment, where
it is very welcome. Drayton, Daventry. 18 May, 2019
I was expecting it to attract bumblebees and indeed it has, with this Buff-tailed Bumblebee, Bombus terrestris, so furry that it looks way out of focus. This is the relatively small female worker; the queens are considerably bigger.
The Phacelia was attracting bees - as I had hoped.
Drayton Allotments, Daventry. 18 May, 2019...
...but had also attracted this Hairy Shieldbug (aka Sloe Bug).
Drayton Allotments, Daventry. 18 May, 2019