CPC Plant Profile: Arroyo de la Cruz Manzanita
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Plant Profile

Arroyo de la Cruz Manzanita (Arctostaphylos cruzensis)

Photo Credit: Steve Matson
Description
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: N/A
  • Family: Ericaceae
  • State: CA
  • Nature Serve ID: 137554
  • Date Inducted in National Collection: 10/16/2004

Arctostaphylos cruzensis is a manzanita shrub that grows to 2-3' tall and 4-5' in width. It has pointed, oval leaves that are bright green to gray and sometimes toothed on the edges that grow on smooth dark red stems.  The flowers are very pale pink with tapered throats. The fruits are hairy drupes up to a centimeter in diameter and containing angular seeds.

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

Based on an September 2020 extract of the California Plant Rescue Database, Santa Barbara Botanic Garden holds 3 accessions of Arctostaphylos cruzensis in orthodox seed collection. There are as many as 24 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, Santa Barbara Botanic Garden has collected 3 seed accessions of Arctostaphylos cruzensis from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 3 maternal plants

Nature Serve Biotics
  • 05/02/2017

There are less than 20 known occurrences of Arctostaphylos cruzensis. Endemic to two counties in California. Its coastal habitat favors development and it is also threatened by grazing and by recreational use of the coast. Most EO's are on private lands with significant numbers on Hearst property, which is perhaps slated to be partially protected as part of a land deal with ALC.

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Photos
Nomenclature
Taxon Arctostaphylos cruzensis
Authority J.B. Roof
Family Ericaceae
CPC Number 44449
ITIS 23480
USDA ARCR6
Common Names Arroyo de la Cruz Manzanita | La Cruz manzanita
Associated Scientific Names Arctostaphylos cruzensis | Arctostaphylos pechoensis var. cruzensis
Distribution Arctostaphylos cruzensis grows on coastal bluffs and terraces from San Luis Obispo county to Monterey county in California.
State Rank
State State Rank
California S3
Habitat

Ecotone between grassland and Central Maritime Chaparral on coastal slopes; broad-leafed upland forest, coastal bluff scrub, closed-cone coniferous forest, chaparral, coastal scrub, valley and foothill grassland, sandy soil

Ecological Relationships

The coastal sage scrub/coastal chaparral plant communities in which it lives also have Ceanothus hearstiorum, Ceanothus thyrsiflorus, Ceanothus griseus, Adenostoma fasciculatum, Iris douglasii, Lonicera involucrata, Baccharis pilularis, Salvia mellifera, Toxicodendron diversilobum, Diplacus aurantiacus, and Lupinus arboreus (among others).

Pollinators
Common Name Name in Text Association Type Source InteractionID
Reintroduction
Lead Institution State Reintroduction Type Year of First Outplanting

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