https://pfaf.org/User/Plant.aspx?LatinName=Ceanothus+maritimus
Ceanothus maritimus is an evergreen Shrub growing to 1 m (3ft 3in). See above for USDA hardiness. It is hardy to UK zone 8. It is in flower from April to May....
ceanothus maritimusplant databasemaritimepfaf
https://www.biodiversitylibrary.org/DLIndexBrowse.aspx?cat=2&sub=378330
The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity...
library conceptscirpus maritimussea clubdarwinflora