Horsetail spike-rush (Eleocharis equisetoides) recovery strategy: appendix 1

Appendix 1

Subnational Ranks of Horsetail Spike-push in the UNITED STATES
State S-Ranka
Alabama SNR
Arkansas SH
Connecticut S1
Delaware S2
Florida SNR
Georgia S3
Illinois SX
Indiana S1
Louisiana SNR
Maryland S1
Massachusetts SX
Michigan S3
Mississippi S3S4
Missouri SH
New Jersey S1
New York S2
North Carolina S3
Rhode Island S2
South Carolina SNR
Tennessee S1
Texas SNR
Virginia S1
Wisconsin SX

a    Subnational ranks are assigned by each state’s (or province’s) Conservation Data Centre. They are not legal designations, but reflect the relative rarity of the species within that jurisdiction.

S1      Extremely rare; usually 5 or fewer occurrences in the state/province or very few remaining individuals; often especially vulnerable to extirpation.

S2      Very rare; usually between 5 and 20 occurrences in the state/province or with many individuals in fewer occurrences; often susceptible to extirpation.

S3      Rare; usually between 20 and 100 occurrences in the province; may have fewer occurrences, but large number of individuals in some populations; may be susceptible to large-scale disturbances.

S4      Apparently secure; uncommon but not rare; some cause for long-term concern due to declines or other factors.

SH      Historically known from the state/province, but not verified recently (typically not recorded in the state/province in the last 20 years).

SX      Apparently extirpated, with little likelihood of rediscovery. Typically not seen in the state/province for many decades, despite searches at known historic sites.

SNR   Not ranked.

Source: NatureServe (2006).

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