Checklist of the Vascular Plants of Saskatchewan - Native Plant ...

deliberately or accidentally introduced, that have become established in the
natural flora, excluding cultivated plants and adventive plants never
becoming naturally established).
ADV? -- introduced taxa that possibly may be either only adventive (casual) rather than
truly established (naturalized), or not persistent to the present if temporarily
established.
VER? -- reported taxa, whether native or introduced, presumed likely to be present in
Saskachewan, but lacking firm confirmation. Those previously reported taxa
lacking confirmation, that are deemed unlikely to be present, or with reportbases
shown to be erroneous, have been excluded from the main catalogue,
but are listed in Appendix 1.
HYB -- a hybrid taxon.
Rarity/Abundance Designations Assigned for Native Taxa:
N EXT? -- probably extirpated (recorded previously but apparently no longer existing
in the province).
N END -- endangered (critically threatened by human or natural factors with extirpation
throughout all of its Saskatchewan range because of extreme rarity).
Typically 5 or fewer sites in the province or locally sparse at all sites.
N THR -- threatened (imperiled by its rarity and likely to become endangered in
Saskatchewan). Typically found at 6–15 sites in the province and mostly
locally sparse.
N VUL -- vulnerable (at risk because of low or declining numbers and thus of special
concern, but with no obvious immediate endangerment). Typically found at
16–25 sites in the province and locally sparse at many.
N UC -- uncommon (apparently secure in Saskatchewan but of potential long-term
concern because not frequent or numerous in the flora).
N FC -- fairly common and reasonably secure in Saskatchewan.
N C -- common (many occurrences and apparently secure in Saskatchewan).
N CC -- very common or abundant (demonstrably secure with many widespread
occurrences in Saskatchewan and often locally numerous).
N U? -- status uncertain in Saskatchewan due to limited or confused information.
N UR? -- rare, with status undetermined pending more information.
N ? -- a question mark following any abbreviation denotes uncertainty because of
limited information.
Rarity/Abundance Designations Assigned for Naturalized Introduced Taxa:
In ADV? -- introduced and possible adventive; introduced plant taxa whose naturalized
presence in Saskatchewan is questioned.
In R -- single or very few known occurrences.
In UC -- uncommon (not common or numerous in the flora).
In FC -- fairly common.
In C -- common (many occurrences).
In CC -- very common or abundant (with many widespread occurrences and usually
locally numerous).
In U? -- status uncertain in Saskatchewan because of limited information.
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