CPC Plant Profile: Pine Barrens Boneset
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Plant Profile

Pine Barrens Boneset (Eupatorium resinosum)

This plant can grow to 1 meter tall, producing flat-topped inflorescences composed of white rayless flowers. Photo Credit: North Carolina Natural Heritage Program
  • Global Rank: G3 - Vulnerable
  • Legal Status: N/A
  • Family: Asteraceae
  • State: DE, NC, NJ, NY, SC
  • Nature Serve ID: 131084
  • Date Inducted in National Collection: 05/28/1986

Pine barrens boneset is a white-flowered, flat-topped 1m tall Eupatorium of wet places, notable for being glandular and pubescent more or less throughout (Godfrey & Wooten 1981; Cronquist 1980; Radford et al. 1968). John Torrey collected a specimen from New Jersey in 1835 and recognized it as being different from all other known species (Mowbray 1984). It is a plant with a knotty basal crown that perennates by long scaly offshoots from the crown buds (Boyer 1995). It can be considered a bimodal disjunct in that it is found in New Jersey, but formerly in Delaware and New York, and then disjunct to the sandhills and coastal plain of the Carolinas. It is a Federal Species of Concern and considered rare throughout its range.

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Nature Serve Biotics
  • 05/02/2017

Eupatorium resinosum is known from approximately 120 element occurrences in New Jersey and North Carolina. It is historical in New York. It is considered rare in Delaware and throughout its range, except on Fort Bragg Military Reservation, North Carolina. Successional change, pine plantations, and agriculture are threats to this species.

  • 01/01/2010

Successional change Pine plantations Agriculture development/filling of wet areas The plant however, thrives with disturbance and grows around roads and where siltation occurs. (Mowbray 1984)

  • 01/01/2010

120 element occurrences in New Jersey and North Carolina, with many populations in disturbed sites. There are 63 populations extant in NC as of January 1995. It is mainly confined to Fort Bragg and the surrounding area and some private lands in the New Jersey pine barrens (Boyer 1995)

  • 01/01/2010

Populations monitored by Plant Conservation Program in North Carolina (Boyer 1995)

  • 01/01/2010

Active sandhills/coastal plain habitat management occurring at many sites, especially within Fort Bragg and Camp MacKall North Carolina. Management on private lands in North Carolina and New Jersey is less active.

  • 01/01/2010

Basic ecological research, including reproductive biology. Active management on private lands.

  • 01/01/2010

Seed collection from all populations not represented in collection.


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Taxon Eupatorium resinosum
Authority Torr.
Family Asteraceae
CPC Number 1857
ITIS 36000
Common Names Pine Barrens Boneset | pine barren thoroughwort
Associated Scientific Names Eupatorium resinosum | Eupatorium resinosum var. resinosum
Distribution Coastal plain, New Jersey, formerly in New York, formerly in Delaware, North Carolina, South Carolina. (Boyer 1995)
State Rank
State State Rank
Delaware SX
North Carolina S3
New Jersey S2
New York SX
South Carolina S1

*Wetlands*Tidal marshes*Open swamps*Wet ditches*Sandy acid soils of grass-sedge bogs*Pocosin-savannah ecotones*Beaver ponds*Shrub swamps(Boyer 1995)

Ecological Relationships

Pine barrens boneset grows best where vegetation is kept in the early stages of succession by disturbance, areas such as sphagnum and shrub bogs, seepage bogs, beaver ponds, pond shores, stream head pocosins and shrub swamps (Godfrey & Wooten 1981, Mowbray 1984, Weakley 1991). There is a large number of associated species and three rare or special concern associated plants (Kalmia cuneata, Calamovilfa brevipilis, Lindera subcoriacea) (Mowbray 1984). It has a general low frequency of occurrence but is locally abundant in areas where it does occur (Mowbray 1984). It reproduces mainly by sexual means with synchronous flower and seed production (flowers August-October). However, it has the ability to reproduce by agamospermy (asexual reproduction). Pollination and seed dispersal is by wind (Mowbray 1984).

Common Name Name in Text Association Type Source InteractionID
Bees Confirmed Pollinator Link
Butterflies & Moths
Butterflies Confirmed Pollinator Link
Wasps Confirmed Pollinator Link
Lead Institution State Reintroduction Type Year of First Outplanting

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