Native Plant Trust

Rare Plant Recovery Tools

Tracking and Guiding Rare Species Recovery

The first extensive documentation of a region's flora by a private organization

Native Plant Trust provides unique, comprehensive documentation of New England's rare plants. Though designed primarily for professionals who help rare plant species recover, these research-based documents have proven invaluable to other researchers—academics and students, scientists at public agencies and conservation organizations—within and outside the region. 

Detailed descriptions of these tools, Flora Conservanda New England and Conservation and Research Plans for 117 of New England's rarest species, appear in the green boxes below, along with free PDF copies available to download. 

We make our findings freely available to those who need them. Please donate to the Native Plant Trust to help us continue our crucial role in documenting the region's rare plants. Rarity often signals issues affecting the wider ecosystem. Unlike overburdened government agencies, we have the ability to work nimbly across state lines, to reach out personally to private landowners, and to receive private donations for vital research. Thank you!

Flora Conservanda New England

The only comprehensive list of plants in need of conservation in our region, Flora Conservanda 2012 was prepared by our staff, working with our colleagues in the New England Plant Conservation Program.

It documents plants growing in New England that are rare globally, regionally, and locally. It also lists plants that are considered historic in New England (though they may exist elsewhere in the U.S. or the world) and plants whose status in the region was undetermined at the time but believed to be rare. Download Flora Conservanda 2012.

The 2012 list is a revision of the original document, published as the 1996 edition of Rhodora, the journal of the New England Botanical Club. We revised the list for 2012 based on research accumulated over the preceding 15 years, including taxonomic studies and field research by professionals and volunteers. We added species based on their rarity in the wild, and we removed others because we learned that they are more common than previously understood, or else our taxonomic understanding of the species changed so that it is no longer considered rare in New England. 

We view the 2012 list as a snapshot of plant rarity in New England at that time. Information such as the number of extant populations, state rarity ranks, and endangerment codes may no longer be current. For more recent data, please consult the latest state endangerment status and state ranks on Heritage Program websites.

In 2014, we published an article in Rhodora analyzing the changes revealed between 1996 and 2012. Download the Rhodora article.

Conservation and Research Plans

More than 140 expert authors and reviewers contributed to this comprehensive series of Conservation and Research Plans for 117 of New England's rarest plants. 

We designed these plans for a variety of users: Government agencies, volunteers and interns,  private landowners, and anyone else who wants to help rare plant species to recover.

Each plan includes: 

  • a description of the distribution and range of the subject plant
  • the species' biology
  • its current and historical status in each of its New England locations 
  • goals for the plant's protection
  • recommended conservation actions 

To download a plan, click on the species name below: 

Adiantum viridimontanum

Agastache nepetoides

Agastache scrophulariifolia

Ageratina aromatica

Amerorchis rotundifolia

Aplectrum hyemale

Aristolochia serpentaria

Asclepias purpurascens

Aster concolor (Symphyotrichum concolor)

Botrychium lunaria

Bouteloua curtipendula

Calystegia spithamaea

Carex atherodes

Carex barrattii

Carex crawei

Carex davisii

Carex garberi  and Triantha glutinosa

Carex lupuliformis

Carex polymorpha

Carex richardsonii

Carex wiegandii

Castilleja coccinea

Chamaelirium luteum

Corydalis flavula

Cynoglossum virginianum var. boreale

Cyperus houghtonii

Descurainia pinnata

Desmodium cuspidatum

Diphasiastrum sitchense

Doellingeria infirma

Draba glabella

Draba reptans

Echinodorus tenellus

Eleocharis microcarpa

Eleocharis quadrangulata

Eleocharis tricostata

Eriocaulon parkeri

Eupatorium leucolepis var. novae-angliae (Eupatorium novae-angliae)

Eupatorium novae-angliae

Floerkea proserpinacoides

Goodyera oblongifolia

Hackelia deflexa var. americana

Hasteola suaveolens

Hieracium robinsonii

Hydrastis canadensis

Hydrophyllum canadense

Hypericum adpressum

Juncus torreyi

Juncus vaseyi

Liatris borealis (Liatris scariosa var. novae-angliae)

Liatris scariosa var. novae-angliae

Linum sulcatum

Liparis liliifolia

Listera auriculata

Listera australis

Listera convallarioides

Listera cordata

Ludwigia polycarpa

Ludwigia sphaerocarpa

Lycopodiella alopecuroides

Mimulus moschatus

Moehringia macrophylla

Muhlenbergia capillaris

Nabalus racemosus

Nabalus serpentarius

Neobeckia aquatica

Nymphaea leibergii

Onosmodium virginianum

Oxalis violacea

Oxytropis campestris

Panicum flexile

Paronychia argyrocoma

Pedicularis lanceolata

Piptatherum canadense

Platanthera ciliaris

Polemonium van-bruntiae

Polymnia canadensis

Populus heterophylla

Potamogeton ogdenii

Potamogeton strictifolius

Pterospora andromedea

Ranunculus lapponicus

Rhexia mariana

Rhynchospora capillacea

Rhynchospora inundata

Rhynchospora nitens

Rosa acicularis ssp. sayi

Rotala ramosior

Sabatia campanulata

Sabatia stellaris

Salix myricoides

Saururus cernuus

Schoenoplectus etuberculatus

Scirpus longii

Scleria pauciflora

Scleria triglomerata

Sclerolepis uniflora

Scutellaria integrifolia

Senna hebecarpa

Silene stellata

Solidago rigida

Sphenopholis nitida

Sporobolus compositus

Sporobolus heterolepis

Stuckenia filiformis ssp. occidentalis

Symphyotrichum concolor

Taenidia integerrima

Triantha glutinosa and Carex garberi

Triphora trianthophora

Trollius laxus

Valeriana uliginosa

Verbena simplex

Zizia aptera

“The one process now going on that will take millions of years to correct is the loss of genetic and species diversity by the destruction of natural habitats. This is the folly our descendants are least likely to forgive us.”

—E. O. Wilson
State of the Plants.jpg

What Causes Rarity?

Read our in-depth technical report on this and other topics.

Download "State of the Plants Technical Report"