
1) Bluemyrtle
Found on
https://www.crosswordclues.com/clue/blueblossom

(Ceanothus) This group consists of about 55 evergreen and deciduous creepers, shrubs and small trees that grow wild throughout the U.S., Canada, and Mexico south to Guatemala. Ceanothus are commonly known as California Lilacs, as many species are native of that state. Most Ceanothus are tender and need a mild climate in which to grow, though there ...
Found on
http://www.encyclo.co.uk/local/10004

a shrub, Ceanothus thyrsiflorus, of the buckthorn family, abundant in the western U.S., having finely toothed oblong leaves and lilaclike clusters of blue flowers. Also called
Found on
https://www.infoplease.com/dictionary/blueblossom
No exact match found.