Thysanocarpus conchuliferus - Greene
Santa Cruz Island Lacepod
Taxonomic Status: Accepted
Related ITIS Name(s): Thysanocarpus conchuliferus Greene (TSN 507250)
Unique Identifier: ELEMENT_GLOBAL.2.129427
Element Code: PDBRA2Q060
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Thysanocarpus
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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: Thysanocarpus conchuliferus
Conservation Status
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NatureServe Status

Global Status: G2?
Global Status Last Reviewed: 03Nov2016
Global Status Last Changed: 03Nov2016
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G2 - Imperiled
Reasons: Endemic to Santa Cruz Island off the coast of southern California. Known from 15 sites. Competition with alien grasses is probably also a threat, especially in years with abundant rainfall. All the northern Channel Islands have suffered profound loss and degradation of their soils and changes in their plant communities due to large numbers of non-native mammals introduced to the islands starting in the early 1800's. However, the non-native animals have been eradicated from the island and vegetation is recovering.
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 California (S2?)

Other Statuses

U.S. Endangered Species Act (USESA): LE: Listed endangered (31Jul1997)
U.S. Fish & Wildlife Service Lead Region: R8 - California-Nevada

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to the California Channel Islands. 

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

Number of Occurrences: 6 - 20

Number of Occurrences with Good Viability/Integrity: Very few (1-3)

Overall Threat Impact: Medium
Overall Threat Impact Comments: This species is still threatened by soil damage and habitat alteration due to years of herbivory by feral pigs and sheep on Santa Cruz Island (USFWS 2009). Once the major threat to this species, it has been greatly reduced since the removal of sheep in 2000 and pigs in 2006 (USFWS 2009). Other threats are invasive plant species (especially fennel, Foeniculum vulgare), fire suppression, and random naturally occurring events (such as storms, drought, fire, landslides) that could decimate the species due to its limited distribution (USFWS 2009). Climate change is also listed as a possible threat but the extent of this threat is not yet known (USFWS 2009).

Other NatureServe Conservation Status Information

Distribution
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Global Range: Endemic to the California Channel Islands. 

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 CA

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CA Santa Barbara (06083)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
18 Santa Barbara Channel Islands (18060014)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A delicate annual herb with a slender stem, usually 6-15 cm tall, and with narrow, lobed leaves. A dense cluser of small pink-lavender flowers blooms in March and April, followed by fruits with a rounded top, fringed with wings that are strongly incurved towards the flat or concave lower side.
Terrestrial Habitat(s): Forest/Woodland, Shrubland/chaparral, Woodland - Hardwood
Habitat Comments: Dry canyon slopes, rocky ridges, and rock outcrops.
Mostly on shaded n-facing rock faces, slopes, and canyon bottoms; chaparral, oak woodland; 800-1800 ft (245-550m) (Junak et al. 1995)

Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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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: 28Sep2017
NatureServe Conservation Status Factors Author: Maybury, K., rev. Treher and Bittman (2017)

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
  • Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.

  • Junak, S., T. Ayers, R. Scott, D. Wilken, and D. Young. 1995. A flora of Santa Cruz Island. Santa Barbara Botanic Garden, Santa Barbara, California. 397 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.

  • Rollins, R.C. 1993a. The Cruciferae of continental North America: Systematics of the mustard family from the Arctic to Panama. Stanford Univ. Press, Stanford, California. 976 pp.

  • U.S. Fish and Wildlife Service (USFWS). 2009. Thysanocarpus conchuliferus (Santa Cruz Island Fringepod) 5-Year Review: Summary and Evaluation. U.S. Fish and Wildlife Service, Ventura Fish and Wildlife Office, Ventura, California. Online. Available: (Accessed 2011).

  • U.S. Fish and Wildlife Service (USFWS. 1995. Proposed rule for 16 plant taxa from the northern Channel Islands, California. Federal Register 60(142): 37993-38010.

  • U.S. Fish and Wildlife Service. 1997. Final rule for 13 plant taxa from the northern Channel Islands, California. Federal Register 62(147): 40954-40974.

  • U.S. Fish and Wildlife Service. 2000. Thirteen plant taxa from the northern Channel Islands recovery plan. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon.

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