서양등골나물-[정명] Ageratina altissima (L.) R.M.King & H.Rob.

과명	Engler- APG Ⅳ- Asteraceae (국화과)
속명	Ageratina (서양등골나물속)
전체학명	[정명] Ageratina altissima (L.) R.M.King & H.Rob.
추천명	서양등골나물
비추천명	미국등골나물,사근초,주름등골나물
영문명	White sanicle

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 plant found in open woods, prairies, fields, and waste areas, with white flowers that bloom in the late summer and fall.

Description

Eupatorium altissimum is a perennial herb sometimes more than 150 cm (5 feet) tall.

Leaves and stems are covered with whitish hairs. Leaves are opposite on the stem and either are sessile or have very short petioles. They are narrow, 5–12 centimetres (2–5 in) long and 8–30 millimetres (0.3–1.2 in) wide. Leaves are lanceolate with 3 prominent veins underneath and teeth appearing only above the middle of the leaves.

E. altissimum produces a large number of small dull white flower heads in a large flat-topped array at the top of the plant. Each head generally has 5 disc florets but no ray florets.

The species is often confused with Brickellia eupatorioides (false boneset) because the flowers look similar and because both grow on limestone soils. However, the leaves of E. altissimum are opposite with 3 prominent veins, while the leaves of B. eupatoioides are alternate with 1 prominent vein. Also, E. altissimum flower heads consist of 5 florets, while the flower heads of B. eupatorioides have 6 to 15 florets.

Eupatorium altissimum - Wikipedia

https://youtu.be/TVfeOYMG4_Y?t=2299