''Eupatorium album'', or white thoroughwort, is a herbaceous perennial plant in the family Asteraceae native from the eastern and southern United States, from eastern Texas to Connecticut, inland as far as Indiana.Biota of North America Program 2014 county distribution map
/ref> As with other members of the genus '' Eupatorium'', ''Eupatorium album'' flowers with large numbers of small white

heads A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals may no ...

. The

flower heads A pseudanthium (Greek for "false flower"; ) is an inflorescence that resembles a flower. The word is sometimes used for other structures that are neither a true flower nor a true inflorescence. Examples of pseudanthia include flower heads, compos ...

have 4-5 disc florets each, but no ray florets. The plant grows tall, making it one of the shorter ''Eupatorium'' species. ''Eupatorium album'' is capable of hybridizing with other ''Eupatorium'' species including ''

Eupatorium sessilifolium ''Eupatorium sessilifolium'', commonly called upland boneset or sessile-leaved boneset, is a North American plant species in the family Asteraceae. It is native to the eastern and central United States, found from Maine south to North Carolina ...

'' and '' Eupatorium serotinum''. Its appearance is similar to ''

Eupatorium altissimum ''Eupatorium altissimum'', with the common names tall thoroughwort and tall boneset, is a perennial herbaceous plant in the Asteraceae family with a native range including much of the eastern and central United States and Canada. It is a tall pla ...

'', but differs in that the bracts (located at the base of the flower head) taper to a long point. ''Eupatorium album'' grows in dry, open areas such as power lines, old fields, and eroded slopes. It will not grow under a shady canopy, but can be found in some open woods such as

pine barren Pine barrens, pine plains, sand plains, or pineland areas occur throughout the U.S. from Florida to Maine (see Atlantic coastal pine barrens) as well as the Midwest, West, and Canada and parts of Eurasia. Perhaps the most well known pine-barren ...

s. ;Varieties *''Eupatorium album'' var. ''album'' - most of species range *''Eupatorium album'' var. ''subvenosum'' A. Gray - Delaware, District of Columbia, New Jersey,

New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...

*''Eupatorium album'' var. ''vaseyi'' (Porter) Cronquist - from Alabama to Pennsylvania

References

External links

Alabama Plants, Photographs and information for the plants of Alabama, USA
including photos.
photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 2012
album Flora of the United States Plants described in 1767 {{Eupatorieae-stub

References

Further reading

External links