Idaho Native Plant Society

Rare Plant Conservation Ranks

In light of changes made in 1996 by the U. S. Fish and Wildlife Service to its Candidate designations, the Idaho Native Plant Society (INPS) revised its assigned conservation ranks. The INPS list is split into 3 groups:

• Globally Rare - Taxa rare throughout their range.
• State Rare - Taxa rare within the political boundaries of Idaho but more common elsewhere.
• Review - Global and State rare taxa which may be of conservation concern in Idaho but for which insufficient data exists upon which to base a recommendation regarding appropriate classification.

Globally Rare Species

GP1 = Global Priority 1. Taxa with a GRANK of G1 or T1.
GP2 = Global Priority 2. Taxa with a GRANK of G2 or T2.
GP3 = Global Priority 3. Taxa with a GRANK of G3 or T3
GX = Taxa thought to be globally extinct (i.e., GRANK = GX).

State Rare Species

1 = State Priority. Taxa in danger of becoming extinct or extirpated from Idaho in the foreseeable future if identifiable factors contributing to their decline continue to operate; these are taxa whose populations are present only at critically low levels or whose habitats have been degraded or depleted to a significant degree.

2 = State Priority. Taxa likely to be classified as Priority 1 within the foreseeable future in Idaho, if factors contributing to their population decline or habitat degredation or loss continue.

S = Sensitive. Taxa with small populations or localized distributions within Idaho that presently do not meet the criteria for classification as Priority 1 or 2 but whose populations and habitats might be jeopardized without active management or removal of threats.

M = Monitor. Taxa that are common within a limited range as well as those taxa which are uncommon but have no identifiable threats.

Review Species

R = Review. Defined above.