CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record calystegia_collina_ssp._tridactylosa - Tue, Nov. 30, 2021 00:10 ET c
Calystegia collina ssp. tridactylosa
common namethree-fingered morning-glory
CalPhotos image
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© 2003 BLM, Arcata Field Office  Follow image link for photo data.
life form rhizomatous herb
CA Rare Plant Rank
List 1B.2
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.2: Fairly endangered in California
state rank
S1      ranking system key
global rank
G4T1      ranking system key
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (7):
The Geysers (534D) 3812277, Leesville (547B) 3912224, Hough Springs (548A)? 3912225, Jamison Ridge (582B)? 3912362, Brushy Mountain (582C) 3912352, Dos Rios (583A) 3912363, Covelo East (598C) 3912372
quad data info

Counties, states, regions:
Lake (LAK), Mendocino (MEN)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Cismontane woodland (CmWld)/serpentinite, rocky, gravelly, openings
blooming period Apr-Jun  
elevation range0 - 600 meters
Potentially threatened by geothermal energy development. May intergrade with Calystegia occidentalis ssp. occidentalis and Calystegia malacophylla ssp. malacophylla. See Proceedings of the California Academy of Sciences, series 4, 20: 151 (1931) for original description and Annals of the Missouri Botanical Garden 52(2): 214-216 (1965) for revised nomenclature.
full nameCalystegia collina (E.Greene) Brummitt ssp. tridactylosa (Eastw.) Brummitt
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  CACOT Element Code  PDCON04036
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
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Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Tue, Nov. 30, 2021 from

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