Species Details

Tiarella trifoliata var. trifoliata

trifoliate laceflower

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Photo of Tiarella trifoliata var. trifoliata
© 2021 Scot Loring
Photo of Tiarella trifoliata var. trifoliata
Gerald and Buff Corsi © 2016 California Academy of Sciences
Photo of Tiarella trifoliata var. trifoliata
© 2015 Adrienne Simmons
Scientific Name:
Tiarella trifoliata L. var. trifoliata
Common Name:
trifoliate laceflower
Family: Saxifragaceae
Element Code: PDSAX10031
USDA Plants Symbol: TITRT
Synonyms/Other Names:
CA Rare Plant Rank: 3.2
Fed List: None
State List: None
Global Rank: G5T5
State Rank:
Other Status:
CRPR Changes:
changed from 3 to 3.2 on 2012-08-03
Add Date: 1980-01-01
Date Edited: 2022-06-08
Lifeform: perennial rhizomatous herb
Blooming Period: (May)Jun-Aug
170 - 1500 meters
560 - 4920 feet
General Habitat:
  • Lower montane coniferous forest
  • North Coast coniferous forest
General Micro Habitat: moist shady banks
Micro Habitat:
  • Edges
  • Streambanks
Move to CRPR 2B? Location, rarity, and endangerment information needed, especially quads for TRI Co. Possibly threatened by logging, road maintenance, and recreational activities. Intergrades with var. unifoliata. See MadroƱo 18(5):152-160 (1966) for additional information.
Total Occurrences: 0
Element Occurrence Ranks:
0 0 0 0 0 0
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 0
Presumed Extant 0
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Alaska (AK), California (CA), Idaho (ID), Montana (MT), Oregon (OR), Washington (WA)
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Mendocino (MEN)
Quads: Name (Quad Code)
Ah Pah Ridge (4112348), Blue Lake (4012388), Board Camp Mtn. (4012366), Briceland (4012318), Hiouchi (4112471), Johnsons (4112337), Korbel (4012378), Lord-ellis Summit (4012387), Maple Creek (4012377), Noyo Hill (3912346), Owl Creek (4012358), Scotia (4012441)
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
Counties   Quads