Eupatorium hyssopifolium, also known as Hyssopleaf thoroughwort, is a fall-blooming herbaceous plant

Herbaceous plant

A herbaceous plant is a plant that has leaves and stems that die down at the end of the growing season to the soil level. They have no persistent woody stem above ground...

 native to North America. Like other members of the genus Eupatorium

Eupatorium

Eupatorium is a genus of flowering plants in the aster family, Asteraceae, containing from 36 to 60 species depending on the classification system. Most are herbaceous perennial plants growing to 0.5–3 m tall. A few are shrubs. The genus is native to temperate regions of the Northern Hemisphere....

it has 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 containing a large number of white flowers with disc florets and no ray florets. At 0.5 to one meter tall, it is towards the shorter end of the range of heights found in Eupatorium species.

Plants which classified as E. hyssopifolium can be either diploid or polyploid, and some of them seem to have been the result of past hybridizations with Eupatorium serotinum

Eupatorium serotinum

Eupatorium serotinum, also known as late boneset or late thoroughwort, is a fall-blooming herbaceous plant native to North America...

. Hybrids with Eupatorium album

Eupatorium album

Eupatorium album, or White thoroughwort, is a herbaceous perennial plant in Asteraceae native from the eastern states of the USA. Like other members of the genus Eupatorium, it flowers with large numbers of small white heads. The flower heads have disc florets but no ray florets...

and Eupatorium linearifolium

Eupatorium linearifolium

Eupatorium linearifolium is a fall-blooming herbaceous plant native to North America. Like other members of the genus Eupatorium it has inflorescences containing a large number of white flowers with disc florets and no ray florets....

also seem to exist. The hybrid Eupatorium torreyanum is similar to E. hyssopifolium but is a hybrid of E. serotinum and Eupatorium mohrii

Eupatorium mohrii

Eupatorium mohrii, commonly called Mohr's thoroughwort, is a herbaceous perennial plant in Asteraceae native to the southeastern coastal states of the United States, from North Carolina to Florida and Louisiana to Texas. It can also be found in the Caribbean. The stems grow from 30 to over...

.

E. hyssopifolium is found in much of the eastern United States, as far north as New York

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

 and Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

, as far west as Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

, and as far south as Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

. It grows in moist soils.

Uses

The plant can be used medicinally (applied externally for insect and reptile bites). It can also be planted near crops to attract beneficial insects.

External links

• missouriplants.com page including photo