CPC Plant Profile: Summer Holly
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Plant Profile

Summer Holly (Comarostaphylis diversifolia ssp. diversifolia)

Photo Credit: John Rusk
Description
  • Global Rank: T2 - Imperiled
  • Legal Status: N/A
  • Family: Ericaceae
  • State: CA
  • Nature Serve ID: 140835
  • Date Inducted in National Collection: 09/18/2021

The Summer Holly is a coastal shrub that is native to California and Baja California, usually found on well drained slopes within chaparral communities. It slowly grows upright to a height of about 20 feet or more, characterized by striking white flowers in the spring. In the summer, it bears holly-like, bright red berries with bumpy skin. As it is highly intolerant to direct water in the summer, the plant will usually die after the first year. Industrialization and development serve as a significant threat to this species, particularly in San Diego County. Gravel mining is also a threat, and as a result the summer holly has been diminished to approximately six to twenty extant occurrences.

Participating Institutions
Updates
  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, San Diego Zoo Global holds 2 accessions of Comarostaphylis diversifolia subsp. diversifolia in orthodox seed collection. There are as many as 8797 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 2 accessions of Comarostaphylis diversifolia subsp. diversifolia in orthodox seed collection. There are as many as 1910 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, San Diego Zoo Global has collected 2 seed accessions of Comarostaphylis diversifolia subsp. diversifolia from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 69 maternal plants

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 2 seed accessions of Comarostaphylis diversifolia subsp. diversifolia from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 25 maternal plants

Nature Serve Biotics
  • 05/02/2017

Comarostaphylis diversifolia ssp. diversifolia is known from approximately six to twenty extant occurrences. Development is a threat, particularly in San Diego County. Gravel mining is also a threat to this taxon.

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Photos
Nomenclature
Taxon Comarostaphylis diversifolia ssp. diversifolia
Authority (Jepson) G. Wallace exThorne
Family Ericaceae
CPC Number 8563
ITIS 523881
USDA CODID2
Common Names Summer Holly | summer-holly
Associated Scientific Names Comarostaphylis diversifolia ssp. diversifolia | Arctostaphylos diversifolia
Distribution
State Rank
State State Rank
California S2
Habitat

Ecological Relationships

Pollinators
Common Name Name in Text Association Type Source InteractionID
Bees
Bumble bees Bombus Not Specified Link
Birds
Hummingbirds Amazilia tzacatl Not Specified Link
Hummingbirds Hylocharis leucotis Not Specified Link
Hummingbirds Cynanthus latirostris Not Specified Link

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