CPC Plant Profile: Santa Catalina Island Manzanita
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Plant Profile

Santa Catalina Island Manzanita (Arctostaphylos catalinae)

Photo Credit: J Brew
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Ericaceae
  • State: CA
  • Nature Serve ID: 160913
  • Date Inducted in National Collection: 09/22/2021

Arctostaphylos catalinae, the Santa Catalina Island Manzanita, is a member of the Manzanita family that can only be found on Catalina Island, California. This shrub flourishes on the coastal ridges of the island and can grow up to 2m tall but has been known to be able mature into a tree-like stature with heights reaching 5m. The stems are lined with fine bristles and produce their white blossoms in clusters between February and April. In past accounts, the grazing of feral goats on the island was a prime threat to this species but since their removal in 2001, A. catalinae has been recovering at an active rate.

Participating Institutions
Center for Plant Conservation
  • 08/17/2021
  • Orthodox Seed Banking

In 2021, CPC contracted the Santa Barbara Botanic Garden to recollect seed from a population currently held in long term orthodox seed storage as part of an IMLS-funded seed longevity experiment. The National Laboratory for Genetic Resources Preservation will evaluate how germination tested viability and RNA Integrity of seed lots decline over time in storage.

  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 7 accessions of Arctostaphylos catalinae in orthodox seed collection. There are as many as 28282 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 7 seed accessions of Arctostaphylos catalinae from 4 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 30 maternal plants

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Taxon Arctostaphylos catalinae
Authority P.V. Wells
Family Ericaceae
CPC Number 210
ITIS 23475
Common Names Santa Catalina Island manzanita
Associated Scientific Names Arctostaphylos catalinae
Distribution A. catalinae is endemic to Santa Catalina Island. On the island itself, it can be found throughout the island's coastline.
State Rank
State State Rank
California S2?

A. catalinae is a coastal scrub that's typically found on the island's coastal ridgelines. 

Ecological Relationships

A. catalinae attracts hummingbirds and a variety of pollinating insects. 

Common Name Name in Text Association Type Source InteractionID

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