Delphinium viridescens - Leib.
Wenatchee Larkspur
Other Common Names: Wenatchee larkspur
Taxonomic Status: Accepted
Related ITIS Name(s): Delphinium viridescens Leib. (TSN 18525)
Unique Identifier: ELEMENT_GLOBAL.2.147393
Element Code: PDRAN0B200
Informal Taxonomy: Plants, Vascular - Flowering Plants - Buttercup Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Ranunculales Ranunculaceae Delphinium
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Concept Reference
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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.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Delphinium viridescens
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 12Dec2012
Global Status Last Changed: 30Jun1988
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G2 - Imperiled
Reasons: A local endemic of the Wenatchee Mountains of central Washington State. Requires moist, meadow-like habitats. About 14 occurrences are currently known, with a total of 5000-10,000 individual plants. Timber management, road construction, and rural home development all potentially contribute to altered site-hydrology, which is probably the greatest threat to the species. Changes in vegetation composition resulting from ground disturbance and altered hydrologic patterns present a secondary threat.
Nation: United States
National Status: N2

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Washington (S2)

Other Statuses

Comments on USESA: Was previously a candidate, but was removed from candidacy on February 28, 1996 in a notice of review.
U.S. Fish & Wildlife Service Lead Region: R1 - Pacific

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to state of Washington; known from Wenatchee Mountains, Chelan and Kittitas Counties. "The extent of its total known range is an area approximately 30 km long and, at its widest, approximately 10 km across" (Richter et al. 1994).

Area of Occupancy: 6-25 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 6 - 20
Number of Occurrences Comments: Fourteen extant occurrences (EO data in the NatureServe database as of August 2012), although in terms of effective breeding populations the number is probably smaller.

Population Size Comments: Determining the number of individuals is difficult; number of stems is probably at least 5-10,000, although it varies annually at any given site. A survey of five populations found fewer than 6,000 individuals (Loomis 1985 cited by Richter et al. 1994).

Number of Occurrences with Good Viability/Integrity: Few (4-12)

Overall Threat Impact: High
Overall Threat Impact Comments: Changes in hydrology and outright conversion of habitat are primary threats. Threatened by subdivision and subsequent development of rural residences (WANHP and BLM 1998). Hydrologic changes resulting from development and associated road construction also pose a significant threat (WANHP and BLM 1998). Other threats include timber harvest activities, off-road vehicle use, grazing, invasive species, road maintenance, and climate change (EO data in the NatureServe database as of August 2012). Successional changes may also be locally significant.

Short-term Trend Comments: Habitat has undergone significant alterations, but there is a lack of trend data.

Intrinsic Vulnerability Comments: Species is somewhat tolerant of disturbance, although long-term trends are unknown. Many sites have had some grazing and some have had ORV use.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Endemic to state of Washington; known from Wenatchee Mountains, Chelan and Kittitas Counties. "The extent of its total known range is an area approximately 30 km long and, at its widest, approximately 10 km across" (Richter et al. 1994).

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States WA

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
WA Chelan (53007), Douglas (53017), Kittitas (53037)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
17 Upper Columbia-Entiat (17020010)+, Wenatchee (17020011)+, Upper Yakima (17030001)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A robust perennial herb, 0.6-2.5 m tall, with deeply lobed leaves and dense yellow hairs on the upper stem and flower cluster. Flowers (June and July) have yellow or purple petals and purple sepals that are prominently streaked with yellow.
Palustrine Habitat(s): Riparian
Terrestrial Habitat(s): Forest - Conifer, Forest/Woodland, Grassland/herbaceous
Habitat Comments: Moist meadows, seeps, springs, streamsides, and moist areas in open coniferous forests. 500-1525 m elevation.
Economic Attributes Not yet assessed
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Management Summary
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Stewardship Overview: Determine how to prevent trespassing/ORV use. Assess invading conifers and other competing vegetation for possible control.
Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 12Dec2012
NatureServe Conservation Status Factors Author: Gamon, J.G., WANHP botanist, rev. Gamon/Maybury (1996), rev. J. Arnett, and A. Tomaino (2012)
Management Information Edition Date: 12Dec2012
Management Information Edition Author: Tomaino, A.

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Flora of North America Editorial Committee. 1997. Flora of North America north of Mexico. Vol. 3. Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York. xxiii + 590 pp.

  • 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.

  • Richter, T.S., P.S. Soltis, and D. E. Soltis. 1994. Genetic variation within and among populations of the narrow endemic, Delphinium viridescens (Ranunculaceae). American Journal of Botany 81(8): 1070-1076.

  • Washington Natural Heritage Program and U.S.D.I. Bureau of Land Management. 1998. Field guide to selected rare plants of Washington. Online. Available: http://www1.dnr.wa.gov/nhp/refdesk/fguide/htm/fgmain.htm (accessed 2012).

  • Washington Natural Heritage Program. 1981. An illustrated guide to the endangered, threatened and sensitive vascular plants of Washington. Washington Natural Heritage Program, Olympia. 328 pp.

  • Washington Natural Heritage Program. 1994. Endangered, threatened and sensitive vascular plants of Washington. Dept. of Natural Resources, Olympia, Washington. 52 pp.

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