© U.S. Bureau of Land Management (Colorado Plateau Native Plant Program)

CPNPP Priority Species for Collection and Development

CPNPP collecting activity in 2019 continues to build our inventory of wildland seed to supply new sources for increase by farmers as well as for research and development projects related to plant materials evaluation production and use. 

Farmers produce most of the seed used in restoration and reclamation projects, and BLM buys and uses one to many millions of pounds of seed each year.  To increase chances of successful seeding projects, BLM recommends seed be sourced from within the Seed Transfer Zone in which it will be used.  

Seed Transfer Zones (STZs) are based on climatic and/or performance data, and approximate where seed may be used with little risk of genetic problems or poor performance.  In other words, if a population of Artemisia tridentata is from a particularly arid, cool climate, it will adapt better to another arid, cool climate than to a warmer, more humid climate.  Specifically, if a seed lot is poorly adapted to a seed zone to which it was transferred, the plants may suffer inbreeding depression (not enough genetic variety within a population); outbreeding depression (not enough genetic compatibility with the local seed populations); poor ability to adapt to extreme conditions; or unsuccessful germination.

2019 CPNPP collection target species were determined based on factors including:  STZ gaps in commercial seed availability; current CPNPP wildland seed inventory; and vegetation communities in areas with high likelihood of mineral development (mining and drilling), high wildlife habitat value (e.g. sage grouse and big game habitat), wildfire probability, and drought or climate change vulnerability.

For more information, view the CPNPP Priority Species 2019 presentation.

2019 Regional Target Species

Top Priority:

  • Astragalus lonchocarpus
  • Bouteloua gracilis
  • Cleome lutea
  • Cleome serrulata
  • Heliomeris multiflora
  • Machaeranthera canescens
  • Machaeranthera tanacetifolia
  • Milkweeds
  • Pleuraphis jamesii
  • Spaheralcea parvifolia
  • Sporobolus airoides
  • Sporobolus cryptandrus


Secondary Priority:

  • Achillea millefolium
  • Achnatherum hymenoides
  • Aristida purpurea
  • Astragalus sp.
  • Cymopterus sp.
  • Early seral species
  • Elymus elymoides
  • Legumes
  • Lomatium sp.
  • Phacelia crenulata
  • Sphaeralcea sp.


Low Priority:

  • Asters/Composites
  • Chaenactis douglasii
  • Linum lewisii
  • Pascopyrum smithii
  • Penstemon pachyphyllus
  • Penstemon sp.

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