Roadless Areas
Home/Species/ Byron Larkspur

Delphinium recurvatum

Greene

Byron Larkspur

G2Imperiled (G2?) Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.157158
Element CodePDRAN0B1J0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRanunculales
FamilyRanunculaceae
GenusDelphinium
Other Common Names
Byron larkspur (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 MethodLegacy Rank calculation - Excel v3.1x
Review Date2016-03-30
Change Date2016-03-30
Edition Date2016-03-30
Edition AuthorsG. Davis, rev. R. Bittman (2016)
Threat ImpactHigh
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Delphinium recurvatum is endemic to California and known from 20 to 85 occurrences. Much of its habitat has been converted to agricultural use. Current threats include grazing, agriculture, roads, development, oil mining, and development.
Range Extent Comments
California endemic, Alameda, Contra Costa, Colusa, Fresno, King, Kern, Merced, San Luis Obispo, Solano, and Tulare Counties.
Occurrences Comments
100 mapped occurrences; 15 confirmed extirpated (and there could be more), and 65 historical (CNDDB 2016).
Threat Impact Comments
There are threats to many sites including grazing, agriculture, development, roads/roadsides, oil mining and invasives (CNDDB 2016). But, there are also some with minimal threats too (CNDDB 2016).
Ecology & Habitat

Habitat

Chenopod scrub, cismontane woodland, valley and foothill grassland, vernal pools; alkaline.
Terrestrial Habitats
Forest/WoodlandShrubland/chaparralGrassland/herbaceous
Palustrine Habitats
TEMPORARY POOL
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial development———
2 - Agriculture & aquaculture———
2.1 - Annual & perennial non-timber crops———
2.3 - Livestock farming & ranching———
3 - Energy production & mining———
3.1 - Oil & gas drilling———
4 - Transportation & service corridors———
4.1 - Roads & railroads———
8 - Invasive & other problematic species, genes & diseases———
8.1 - Invasive non-native/alien species/diseases———

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Plant Characteristics
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Lpoor CanyonLos Padres National Forest13,762
References (3)
  1. California Natural Diversity Database (CNDDB). 2016. RareFind Version 5.1.1. California Department of Fish and Game, Sacramento.
  2. 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.
  3. Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.