Difference between revisions of "California Native Plant Society (CNPS) Rare Plant Ranking System"

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[[Image:CNPS Rare Flower.jpg|230px|thumb|right|CNPS Rare Plant Rank 4.2 Catalina mariposa lily. Image from CNPS: [http://www.cnps.org/cnps/education/workshops/2016/0314_rare_plant.php]]]
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[[Image:CNPS Rare Flower.jpg|230px|thumb|right|CRPR 4.2 Santa Catalina mariposa lily. Image from CNPS <ref name="CNPSpic">Santa Catalina mariposa lily photograph  www.cnps.org/cnps/education/workshops/2016/0314_rare_plant.php </ref>
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This page discuses the rarity index developed by the [[California Native Plant Society (CNPS)]].
 
This page discuses the rarity index developed by the [[California Native Plant Society (CNPS)]].
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For more information visit the [http://www.cnps.org/cnps/rareplants/ranking.php CNPS RPRS description page] and [http://www.rareplants.cnps.org/glossary.html#lists section on the RPRS in the CNPS Glossary of Terms and Field Descriptions].
 
For more information visit the [http://www.cnps.org/cnps/rareplants/ranking.php CNPS RPRS description page] and [http://www.rareplants.cnps.org/glossary.html#lists section on the RPRS in the CNPS Glossary of Terms and Field Descriptions].
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==Rankings==
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Plants are assigned a California Rare Plant Rank (CRPR) of 1A to 4 in addition to a threat rank .1 to .3 (e.g. 1B.2).
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{| class="wikitable" style="display: inline-table;"
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|-
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!scope="col" style="width: 100px;" |  California Rare Plant Ranks <ref name="CNPS">CNPS Glossary of Terms and Field Descriptions http://www.rareplants.cnps.org/glossary.html#lists </ref>
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!
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|-
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| style="text-align: center;" |1A
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| Presumed Extirpated in CA, Rare or Extinct Elsewhere
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|-
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| style="text-align: center;" |1B
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| Rare, Threatened, or Endangered in CA and Elsewhere
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|-
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| style="text-align: center;" |2A
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| Presumed Extirpated in CA, Common Elsewhere
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|-
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| style="text-align: center;" |2B
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| Rare, Threatened, or Endangered in CA, More Common Elsewhere
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|-
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| style="text-align: center;" |3
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| More Information is Needed (Review List)
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|-
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| style="text-align: center;" |4
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| Limited Distribution (Watch List)
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|}
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{| class="wikitable" style="display: inline-table;"
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|-
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! Threat Rank  <ref name="CNPS"/>
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!
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|-
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| style="text-align: center;" |.1
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| Seriously threatened: over 80% of occurrences threatened (high degree and immediacy of threat)
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|-
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| style="text-align: center;" |.2
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| Moderately threatened: 20-80% occurrences threatened (moderate degree and immediacy of threat)
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|-
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| style="text-align: center;" |.3
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| Not very threatened: less than 20% of occurrences threatened (low degree and immediacy of threat or no current threats known)
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|}
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==References==
 
==References==

Revision as of 15:49, 24 March 2020

CRPR 4.2 Santa Catalina mariposa lily. Image from CNPS [1]

This page discuses the rarity index developed by the California Native Plant Society (CNPS).

Summary

The CNPS created the California Rare Plant Ranking System (RPRS) to define and categorize the rarity of Californian plant species.

For more information visit the CNPS RPRS description page and section on the RPRS in the CNPS Glossary of Terms and Field Descriptions.

Rankings

Plants are assigned a California Rare Plant Rank (CRPR) of 1A to 4 in addition to a threat rank .1 to .3 (e.g. 1B.2).

California Rare Plant Ranks [2]
1A Presumed Extirpated in CA, Rare or Extinct Elsewhere
1B Rare, Threatened, or Endangered in CA and Elsewhere
2A Presumed Extirpated in CA, Common Elsewhere
2B Rare, Threatened, or Endangered in CA, More Common Elsewhere
3 More Information is Needed (Review List)
4 Limited Distribution (Watch List)
Threat Rank [2]
.1 Seriously threatened: over 80% of occurrences threatened (high degree and immediacy of threat)
.2 Moderately threatened: 20-80% occurrences threatened (moderate degree and immediacy of threat)
.3 Not very threatened: less than 20% of occurrences threatened (low degree and immediacy of threat or no current threats known)


References

  1. ↑ Santa Catalina mariposa lily photograph www.cnps.org/cnps/education/workshops/2016/0314_rare_plant.php
  2. ↑ 2.0 2.1 CNPS Glossary of Terms and Field Descriptions http://www.rareplants.cnps.org/glossary.html#lists

Links

Disclaimer

This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of [CSUMB], its staff, or students.

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