Warning This Web page has been archived on the Web.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards, as per the Policy on Communications and Federal Identity.

Skip booklet index and go to page content

Horsetail Spike-rush

Appendix 1

Subnational Ranks of Horsetail Spike-push in the UNITED STATES
StateS-Ranka
AlabamaSNR
ArkansasSH
ConnecticutS1
DelawareS2
FloridaSNR
GeorgiaS3
IllinoisSX
IndianaS1
LouisianaSNR
MarylandS1
MassachusettsSX
MichiganS3
MississippiS3S4
MissouriSH
New JerseyS1
New YorkS2
North CarolinaS3
Rhode IslandS2
South CarolinaSNR
TennesseeS1
TexasSNR
VirginiaS1
WisconsinSX

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).

Page 6