This blue Salvia is the only one of its kind in the garden. While it is not the most prolific bloomer among the various Salvias, it is a favorite of the black carpenter bees (Xylocopa species).
Salvia is a huge, diverse genus of plants in the mint family (Lamiaceae). They all have interesting, bilaterally symmetric flowers and square stems. Taxonomists disagree about whether Salvia should be split into several smaller genera. Because of certain details in their unique lever-and-trigger pollen delivery mechanisms, they might not have all come from one common ancestor.
What species of Salvia is this? Beats me. There are tons of them! If you feel like identifying it, let me know!
As for the bees, these black beauties are some of the largest I’ve seen. They are shiny and gorgeous! Carpenter bees like to dig deep burrows into the undersides of dry, dead branches – one great reason to leave a few dead woody plants in your garden if possible. They have very interesting mating and breeding habits, collecting pollen and nectar and fashioning it into lumpy masses stuffed into their burrows. Then they lay an egg on the mass.
Carpenter bees are not bumblebees. Bumblebees have densely furry bodies, while carpenter bees usually have smooth, shiny abdomens.
In the shade under the awning upstairs, there is a small pile of dead, dry branches. Several carpenter bees have constructed burrows on the undersides of the branches. On the deck surface below, there are scattered, windblown deposits of extremely fine sawdust.