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Calochortus syntrophus

Callahan

G2Imperiled Found in 6 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
High - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.144430
Element CodePMLIL0D1S0
Record TypeSPECIES
ClassificationSpecies
Classification StatusProvisional
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderLiliales
FamilyLiliaceae
GenusCalochortus
Concept Reference
Callahan, II. F.T. 1993. A new species of Calochortus (Liliaceae-Tulipeae) from Shasta County, California. Herbertia 49(1&2):20-27.
Taxonomic Comments
Calochortus syntrophus is not addressed in Kartesz's 1999 Synthesis or Flora North America vol. 26 (2002). However, the author of the Flora of North America (2002) treatment did subsequently recognize it in the Jepson Manual, 2nd Edition (Baldwin et al. 2012) and noted "it is definitely a distinctive new taxon-with very localized distribution" (P. Fiedler. pers. comm., 2009).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2021-09-29
Change Date2021-09-29
Edition Date2021-09-29
Edition AuthorsOliver, L.
Threat ImpactHigh - medium
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences6 - 20
Rank Reasons
Calochortus syntrophus is endemic to Tehama and Shasta County, California and is threatened by collection for the horticultural trade and timber activities.
Range Extent Comments
Calochortus syntrophus is endemic to Shasta and Tehama County, California (CNDDB 2021, Callahan 1993).
Occurrences Comments
There are 10 occurrences known (NatureServe 2021).
Threat Impact Comments
This species is threatened by collection for the horticultural trade (Jepson Interchange 2012). Other threats include road construction, timber harvest activities and trash (NatureServe 2021).
Ecology & Habitat

Habitat

This species grows in blue-oak woodlands on stony sandstone of the Kilarc series (Jepson Flora Project 2021), at elevations of 430 to 1,220 m (CNDDB 2021).
Terrestrial Habitats
Forest/WoodlandWoodland - Hardwood
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
4 - Transportation & service corridorsRestricted (11-30%)Moderate or 11-30% pop. declineModerate (short-term)
4.1 - Roads & railroadsRestricted (11-30%)Moderate or 11-30% pop. declineModerate (short-term)
5 - Biological resource usePervasive (71-100%)Serious - moderateHigh (continuing)
5.2 - Gathering terrestrial plantsPervasive (71-100%)Serious - moderateHigh (continuing)
5.3 - Logging & wood harvestingLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (6)
California (6)
AreaForestAcres
East GirardShasta-Trinity National Forest27,894
Heart LakeLassen National Forest9,349
IshiLassen National Forest21,805
Kettle Mtn.Shasta-Trinity National Forest4,589
Mill CreekLassen National Forest7,587
Polk SpringsLassen National Forest9,466
References (6)
  1. Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, eds. 2012. The Jepson manual: vascular plants of California. 2nd edition. University of California Press, Berkeley, CA. 1568 pp.
  2. Callahan, II. F.T. 1993. A new species of Calochortus (Liliaceae-Tulipeae) from Shasta County, California. Herbertia 49(1&2):20-27.
  3. Fiedler, Peggy. Personal communication. Executive Director, University of California Natural Reserve System.
  4. Jepson Interchange for California Floristics. 2012. <i>Calochortus syntrophus</i> Callahan. Accessed online on September 29, 2021 at: https://ucjeps.berkeley.edu/cgi-bin/get_cpn.pl?77510&amp;expand=1
  5. NatureServe. 2021. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  6. Patterson, T. B. and T. J. Givnish. 2003. Geographic cohesion, chromosomal evolution, parallel adaptive radiations, and consequent floral adaptations in <i>Calochortus</i> (Calochortaceae): evidence from a cpDNA phylogeny. New Phytologist 161: 253-264.