Appendix E. Explanation of listing codes.
In 1987, the New Hampshire state legislature passed the Native Plant Protection Act (RSA 217-A) and fr ay eon e t tfr u a nes n ej m n t i e s o si c,n t eoo y f om l r gi d h “ hm n ed ad n y et h n r t fc neadh cnm o l c z a o o , e te s e e the state, native plants throughout this state should be protected and conserved; and . . . their numbers should be maintained and enhanced to insure their perpetuation as viable components of their ecosystems frh bnf o t polo N wH m si . T cm ile a list of the species requiring protection, o t ee t fh ep f e a ph e o o p e i e e r” the NH Natural HeritageBureau collaborated with knowledgeable botanists and identified the most i pre t a s edne d adhs l e t bcm edne d s t et e. At ao 28 m e l a a “nagr ” n t ei l o eo e nagr a “ r e d id x e o ky e h a n ” o lf 8 t taxa were listed, 144 as endangered and 144 as threatened. A revised list currently moving thru the state adoption process includes nearly 100 additional endangered or threatened species. In addition to endangered and threatened categories, state watch and indeterminate categories exist. Plants listed under these latter two categories do not receive protection under the Native Plant Protection Act. However, because they are at least relatively rare in New Hampshire, plants listed as watch or indeterminate warrant some consideration when planning management activities. Endangered: Native plants documented as having five or fewer natural occurrences in the state observed within the last 20 years, or plants with more than five occurrences that are, in the judgement of experts, critically imperiled by extirpation due to other important rarity considerations (number of individuals, a a f ou t n cuac,etcvnsad ir u o o sei ’ egah r g,aita t r o ppli ocpnyr r t ees n d tbt n fpc sgor i a ehb ar i , e ao sii si i e pc n t ry population trends, population viability, and degree of protection). Threatened: Native plants documented as having 6-20 natural occurrences in the state observed within the last 20 years, or plants with more than 20 occurrences that are, in the judgement of experts, vulnerable to extirpation due to other important rarity considerations (number of individuals, area of population ocpnyr tcvnsad ir u o o sei ’ egah r g,aita t ppli t ns cuac,e r t ees n d tbt n fpc sgor i a ehb ar i ,ou t nr d, sii si i e pc n t ry ao e population viability, and degree of protection). Watch: Native plants documented as having 21-100 natural occurrences in the state observed within the last 20 years, or plants that are, in the judgement of experts, possibly vulnerable to extirpation due to other important rarity considerations (number of individuals, area of population occupancy, r tcvnsad ir u o o sei ’ egah r g,aita t ppli t nsppli e r t ees n d tbt n fpc sgor i a ehb ar i ,ou t nr d,ou t n sii si i e pc n t ry ao e ao viability, and degree of protection). Native plants whose status is uncertain, but are possibly in peril, may be designated state watch as well. Indeterminate: Indeterminate taxa are under review for listing as endangered, threatened, or watch, but their rarity, nativity, taxonomy, and/or nomenclature are not clearly understood.