A new Bee for the Garden (at Home): Andrena florea ... Updated 24 May 2019 (see Footnote)

We usually pull the White Bryony out but for some reason left it this year. We were amazed a few days ago to find it abuzz with Bees. And we now know that some of these Bees are Andrena florea.

They are Listed as 'Rare'. That being said, might 'Rare' simply mean, 'Under-Recorded?

According to the Bees, Wasps and Ants Recording Society (BWARS), 'this species [viz. Andrena florea] is one of the very few Bees that, in Britain, visits only a single flower species for Pollen [viz. White Bryony]'.

Footnote dated 24 May 2019: as we understand it, the Bees collect Pollen from White Bryony viz.

and Nectar from other Plants viz. in these instances from Cotoneaster and Wood Avens: