CPC Plant Profile: Schreiber's Manzanita
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Plant Profile

Schreiber's Manzanita (Arctostaphylos glutinosa)

Photo Credit: ©2011 Neal Kramer
Description
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: N/A
  • Family: Ericaceae
  • State: CA
  • Nature Serve ID: 137569
  • Date Inducted in National Collection: 09/18/2021

Otherwise known as the Schreiber’s Manzanita, Arctostaphylos glutinosa is a critically endangered member of the Manzanita family with only six known populations left as of 2013; all of which can only be found in northern Santa Cruz, CA. This sturdy shrub is a 3’oclock bloomer (March-April) that produces clusters of pale pink, urn-shaped flowers and prefers a mixed pine forest/chaparral habitat where it can grow up to 2m tall. A. glutinosa’s also has a preference for the region’s shale (chalk) sediment, a prime contributor for its global status. In recent years, there’s been a wave of corporate site development for future missile launch sites (which are often based on chalky sediment). Other threatening factors include road maintenance and other forms of human development in the area.

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

Based on an September 2020 extract of the California Plant Rescue Database, University of California-Santa Cruz Arboretum & Botanic Garden holds 1 accessions of Arctostaphylos glutinosa in orthodox seed collection. We are uncertain as to how many total seeds are in this collection.

  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 1 accessions of Arctostaphylos glutinosa in orthodox seed collection. There are as many as 13528 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, University of California-Santa Cruz Arboretum & Botanic Garden has collected 2 seed accessions of Arctostaphylos glutinosa from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 13 maternal plants

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Photos
Nomenclature
Taxon Arctostaphylos glutinosa
Authority Schreib.
Family Ericaceae
CPC Number 217
ITIS 23486
USDA ARGL5
Common Names Schreiber's manzanita
Associated Scientific Names Arctostaphylos glutinosa
Distribution
State Rank
State State Rank
California S1
Habitat

Schreiber's manzanita prefers a mixed habitat including chaparral, closed-cone pine forest, and oak woodland. In these areas, they grow on hillsides and slopes where the sediment is mainly made up of shale (chalk). 

Ecological Relationships

Arctostaphylos glutinosa shares a beneficial relationship with pollinating insects and hummingbirds.

Pollinators
Common Name Name in Text Association Type Source InteractionID

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