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Trichostema ovatum

Curran

San Joaquin Bluecurls

G3Vulnerable Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.159738
Element CodePDLAM220A0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderLamiales
FamilyLamiaceae
GenusTrichostema
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 Date2024-09-10
Change Date2024-09-10
Edition Date2018-10-01
Edition AuthorsBittman (2018)
Threat ImpactHigh
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences81 - 300
Rank Reasons
Trichostema ovatum is an annual forb occurring in scrubland, valley grasslands, and disturbed sites of the San Joaquin Valley and western Transverse Ranges of California. There are an estimated 81 to 300 occurrences of this species, which occur where threats from development and agriculture are high. Recreational activities may also pose a threat to Trichostema ovatum. Historical populations need to be monitored to determine if plants are still extant.
Range Extent Comments
Trichostema ovatum is endemic to the San Joaquin Valley and western Transverse Ranges of California in the western United States (CNPS 2024, Jepson Flora Project 2024).
Occurrences Comments
The number of occurrences was estimated to be 81 to 300.
Threat Impact Comments
Trichostema ovatum is potentially threatened by recreational activities (CNPS 2024). However, given the species' range in the San Joaquin Valley, it is likely that many historical populations are now extirpated due to the high degree of threat from agriculture and development in this region.
Ecology & Habitat

Habitat

Trichostema ovatum occurs in chenopod scrublands, valley and foothill grasslands, and disturbed sites (CNPS 2024, Jepson Flora Project 2024).

Reproduction

Trichostema ovatum is a warm season annual, germinating from March through May, and completing its lifecycle during the hot, dry summer months (Borders 2010). This species has a long flowering window, from May through October, with peak flowering occurring in June through August.
Terrestrial Habitats
Shrubland/chaparralGrassland/herbaceous
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentUnknownUnknownUnknown
2 - Agriculture & aquacultureUnknownUnknownUnknown
2.1 - Annual & perennial non-timber cropsUnknownUnknownUnknown
2.1.4 - Scale unknown/unrecordedUnknownUnknownUnknown
6 - Human intrusions & disturbanceUnknownUnknownUnknown
6.1 - Recreational activitiesUnknownUnknownUnknown

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Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Greenhorn CreekSequoia National Forest28,226
References (4)
  1. Borders, B. 2010. <i>Trichostema ovatum</i>. Valley Flora Propogation Center Species Profile compiled and edited by California State University, Stanislaus' Endangered Species Recovery Program, Fresno county, CA. 3 pp. Online. Available: <a href="https://esrp.csustan.edu/vfpc/profiles/TROV.pdf">esrp.csustan.edu/vfpc/profiles/TROV.pdf</a> (accessed 2024).
  2. California Native Plant Society (CNPS), Rare Plant Program. 2024. Inventory of Rare and Endangered Plants of California, online edition, v9.5. Online. Available: https://www.rareplants.cnps.org (accessed 2024).
  3. Jepson Flora Project (eds.) 2024. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (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.