Based on an September 2020 extract of the California Plant Rescue Database, San Diego Zoo Global holds 3 accessions of Ceanothus verrucosus in orthodox seed collection. There are as many as 79132 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.
Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 2 accessions of Ceanothus verrucosus in orthodox seed collection. There are as many as 268 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.
Based on an August 2020 extract of the California Plant Rescue Database, San Diego Zoo Global has collected 3 seed accessions of Ceanothus verrucosus from 3 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 294 maternal plants
Ceanothus verrucosus has limited habitat and distribution in an area that is growing rapidly. In California is found in western San Diego county. In Baja California, Mexico, its abundance is not known.
Already heavily impacted by development and the resultant habitat destruction, this threat persists against the extant populations. Specifically road development and maintenance have been noted (CNDDB 2017).
The known populations lack regular monitoring, and this will need to be done to gain a better picture of the species' status. Of the 67 occurrences listed, 62 are presumed to be extant (CNDDB 2017). Populations range in size from a few to hundreds, occassionally being the dominant species in a patch of chaparral (over 50% shrub cover).
Seed has been collected and seed research will soon commence.
Currently, managing the vegetation of chaparral habitats and working to prevent frequent burns are the primary management goals (MSP 2016).
Monitoring of occurrences will help determine the true status of the species and whether further management actions are needed.
To ensure the genetic diversity of the species is being conserved, seed collections should be made across the existing occurrences.
The species can be found in nurseries, and is actually recognized as one of the easier southern California ceanothus species to propagate. It seems to tolerate both summer water tough drought conditions better than most other southern California Ceanothus species. Outplanted individuals do best with monthly watering through its first summer, but being left alone in subsequent years (CNPS 2017).
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