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Home/Species/ Tricolor Monkeyflower

Diplacus tricolor

(Hartweg ex Lindl.) G.L. Nesom

Tricolor Monkeyflower

G4Apparently Secure Found in 3 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.138660
Element CodePDSCR1B2Q0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderLamiales
FamilyPhrymaceae
GenusDiplacus
Synonyms
Mimulus tricolorHartw. ex Lindl.
Concept Reference
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic Comments
The Flora of North America (vol. 17 2019) transfers Mimulus tricolor to Diplacus tricolor; these represent the same concept for the element.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-06-04
Change Date1989-02-08
Edition Date2024-06-04
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences81 - 300
Rank Reasons
Diplacus tricolor is a wide-ranging annual herb in vernally flooded depressions in grasslands and ditches around agricultural fields occurring in the western United States in Oregon and California. Threats include hydrological alteration, grazing and tramping, agriculture, and invasive species. Little is known about trends, but with a large range extent and large number of occurrences, this species is considered secure.
Range Extent Comments
Diplacus tricolor occurs in the western United States in western Oregon and disjunctly through northern and central California, including the following provinces: Inner and Outer North Coast Ranges, Sacramento and San Joaquin Valleys, and Modoc Plateaus (Jepson Flora Project 2024). Range extent was estimated to be over 190,000 square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1983 and 2024 (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1983 and 2024, it is estimated that there are over 170 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact Comments
Although threats are not widely documented, this species is potentially threatened by hydrological alteration, grazing and tramping, agriculture, invasive species, and other threats in some places.
Ecology & Habitat

Habitat

Diplacus tricolor grows in "vernally flooded depressions in grasslands, low spots and ditches in and around agricultural fields" (FNA 2019).
Terrestrial Habitats
Grassland/herbaceous
Palustrine Habitats
TEMPORARY POOLHERBACEOUS WETLAND
Other Nations (1)
United StatesN4
ProvinceRankNative
CaliforniaSNRYes
OregonS2Yes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (3)
California (2)
AreaForestAcres
MayfieldLassen National Forest14,444
Timbered CraterLassen National Forest4,096
Oregon (1)
AreaForestAcres
W. BoundaryWinema National Forest2,345
References (7)
  1. Flora of North America Editorial Committee (FNA). 2019. Flora of North America north of Mexico. Vol. 17: Magnoliophyta: Tetrachondraceae to Orobanchaceae. Oxford Univ. Press, New York. xxiv + 737 pp.
  2. Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
  3. iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
  4. Jepson Flora Project (eds.) 2024. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2024).
  5. Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
  6. NatureServe. 2024. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  7. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).