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Tetrapteron graciliflorum

(Hook. & Arn.) W.L. Wagner & Hoch

Slender-flower Suncup

G4Apparently Secure Found in 6 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.136710
Element CodePDONA030L0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderMyrtales
FamilyOnagraceae
GenusTetrapteron
Synonyms
Camissonia graciliflora(Hook. & Arn.) Raven
Other Common Names
Hill Suncup (EN) Hill Sun Cup (EN)
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.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-06-04
Change Date1996-01-24
Edition Date2024-06-04
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 - 300
Rank Reasons
Tetrapteron graciliflorum is a wide-ranging annual herb in open or brushy slopes, grasslands, or shrublands occurring in western North America from southern Oregon, United States south to Baja California, Mexico. Threats include grazing and tramping, intense fires, 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
Tetrapteron graciliflorum occurs in western North America in southern Oregon and California in the United States and Rancho Aguajito in Baja California, Mexico (FNA 2021). Range extent was estimated to be over 280,000 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 230 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 grazing and tramping, intense fires, invasive species, and other threats in some places.
Ecology & Habitat

Habitat

Tetrapteron graciliflorum grows in "open or brushy slopes, on clay soil, grasslands, Yucca or juniper and oak shrublands" (FNA 2021).
Terrestrial Habitats
Woodland - ConiferWoodland - MixedShrubland/chaparralGrassland/herbaceous
Other Nations (1)
United StatesN4
ProvinceRankNative
CaliforniaSNRYes
OregonS2Yes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (6)
California (6)
AreaForestAcres
Black MountainLos Padres National Forest16,818
ChannellSequoia National Forest45,429
Domeland Add.Sequoia National Forest3,046
Lpoor CanyonLos Padres National Forest13,762
Mill CreekSequoia National Forest27,643
WildhorseCleveland National Forest1,483
References (6)
  1. Flora of North America Editorial Committee (FNA). 2021. Flora of North America north of Mexico. Vol. 10. Magnoliophyta: Proteaceae to Elaeagnaceae. Oxford Univ. Press, New York. xxiv + 456 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. 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.
  5. NatureServe. 2024. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  6. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).