Eupatorium resinosum
Encyclopedia
Eupatorium resinosum, or Pine barren thoroughwort, is a herbaceous perennial plant in Asteraceae
Asteraceae
The Asteraceae or Compositae , is an exceedingly large and widespread family of vascular plants. The group has more than 22,750 currently accepted species, spread across 1620 genera and 12 subfamilies...

 native to the eastern coastal states of the United States, from North Carolina to New Jersey and Delaware. The stems grow from 40 to over 100 cm tall and are produced from short rhizome
Rhizome
In botany and dendrology, a rhizome is a characteristically horizontal stem of a plant that is usually found underground, often sending out roots and shoots from its nodes...

s. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

s are composed of a large number of white flower heads with disc florets and no ray florets. This species typically grows in moist areas, areas with acidic soils, and pine barrens. It is pollinated by insects and is self-incompatible. It is rare, with only dozens of populations known, and has been extirpated from several states due to habitat destruction.
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