CNPS

CNPS Rare Plant Inventory

Species Details

Calystegia vanzuukiae

Van Zuuk's morning-glory

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Classification

Scientific Name:
Calystegia vanzuukiae Brummitt & Namoff
Common Name:
Van Zuuk's morning-glory
Family: Convolvulaceae
Element Code: PDCON040Q0
USDA Plants Symbol: CAVA
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank: 1B.3
Fed List: None
State List: None
Global Rank: G2Q
State Rank:
 S2
Other Status: BLM_S
CRPR Changes:
added to 1B.3 on 2014-07-16
Add Date: 2014-07-16
Date Edited: 2021-10-04

Ecology and Life History

Lifeform: perennial rhizomatous herb
Blooming Period: May-Aug
Elevation:
500 - 1180 meters
1640 - 3870 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
General Micro Habitat:
Micro Habitat:
  • Gabbroic
  • Serpentinite

Notes

Notes:
Known only from the Central Sierra Nevada foothills. Potentially threatened by mining, vehicles, and non-native plants. Probably a stabilized hybrid between C. stebbinsii and C. occidentalis ssp. occidentalis. See Aliso 31(1):15-18 (2013) for original description.
Threats:
Taxonomy:
Other:

Occurrence Data from the CNDDB

Total Occurrences: 13
Element Occurrence Ranks:
A B C D X U
3 3 1 1 0 5
Occurrence Status:
Historical >20 Years 1
Recent <=20 Years 12
Presence:
Presumed Extant 13
Possibly Extirpated 0
Presumed Extirpated 0

Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
El Dorado (ELD), Placer (PLA)
Quads: Name (Quad Code)
Dutch Flat (3912027), Foresthill (3912017), Garden Valley (3812077), Georgetown (3812087), Michigan Bluff (3912016)
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

CNPS Status Review: CRPR List Addition on 2014-07-16
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 16 May 2022].