Species Details

Ceanothus decornutus

Nicasio ceanothus

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Photo of Ceanothus decornutus
© 2014 Vernon Smith
Photo of Ceanothus decornutus
© 2022 Roger Stephens
Photo of Ceanothus decornutus
© 2015 Robert Steers
Scientific Name:
Ceanothus decornutus V.T. Parker
Common Name:
Nicasio ceanothus
Family: Rhamnaceae
Element Code: PDRHA04440
USDA Plants Symbol:
Synonyms/Other Names:
CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G1
State Rank:
S1
Other Status: SB_CalBG/RSABG
CRPR Changes:
added to 1B.2 on 2016-06-16
Add Date: 2016-06-16
Date Edited: 2023-08-01
Lifeform: perennial shrub
Blooming Period: Mar-May
JFMAMJJASOND
Elevation:
235 - 290 meters
770 - 950 feet
General Habitats:
  • Chaparral (maritime)
Microhabitat Details:
Microhabitat:
  • Clay (sometimes)
  • Rocky
  • Serpentine
Notes:
Discovered in the 1980’s by Wilma Follette. Similar to C. jepsonii; primarily differs from it in having 5-merous flowers that are white, light blue, or pink. See Madroño 61(4):399-406 (2014) for original description.
Threats:
Potentially threatened by non-native plants. Possibly threatened by insect herbivory.
Taxonomy:
Threat List Total: 2
Total EOs % of EOs
EOs with Threat Listed: 1 50 %
THREAT LIST:
Non-native plant impacts 1 50%
Other 1 50%
Total Occurrences: 2
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 2
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 2
Presence:
Presumed Extant 2
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Marin (MRN)
Quads: Name (Quad Code)
San Geronimo (3812216)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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