CNPS

CNPS Rare Plant Inventory

Species Details

Chorizanthe robusta var. hartwegii

Scotts Valley spineflower

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Classification

Scientific Name:
Chorizanthe robusta Parry var. hartwegii (Benth.) Rev. & Morgan
Common Name:
Scotts Valley spineflower
Family: Polygonaceae
Element Code: PDPGN040Q1
USDA Plants Symbol: CHROH
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: FE (1994-02-04)
State List: None
Global Rank: G2T1
State Rank:
 S1
Other Status:
CRPR Changes:
Add Date: 1994-01-01
Date Edited: 2021-05-26

Ecology and Life History

Lifeform: annual herb
Blooming Period: Apr-Jul
Elevation:
230 - 245 meters
755 - 805 feet
General Habitat:
  • Meadows and seeps (sandy)
  • Valley and foothill grassland (mudstone, Purisima outcrops)
General Micro Habitat:
Micro Habitat:

Notes

Notes:
Known only from Scotts Valley. Threatened by development, vehicles, and non-native plants. See C. robusta in TJM (1993). See Phytologia 67(5):357-360 (1989) for revised nomenclature, and Fremontia 24(4):8-11 (1996) for taxonomic discussion.
Threats:
Taxonomy:
Other:

Occurrence Data from the CNDDB

Total Occurrences: 4
Element Occurrence Ranks:
A B C D X U
0 3 0 0 0 1
Occurrence Status:
Historical >20 Years 1
Recent <=20 Years 3
Presence:
Presumed Extant 4
Possibly Extirpated 0
Presumed Extirpated 0

Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Santa Cruz (SCR)
Quads: Name (Quad Code)
Felton (3712211), Laurel (3712118)
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.
Regional Map

Map

Presumed Extant
Print this Map
Counties   Quads

Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2022. Rare Plant Inventory (online edition, v9-01 1.5). Website https://www.rareplants.cnps.org [accessed 11 August 2022].