The words or terms in red
(actually dark orange) in the text are defined in a
The Eutrochium genus is
that of perennials
native to North America.
The genus has 5 species that are also
all native to North America, and two species, Eutrochium fistulosum
and Eutrochium maculatum
(picture at right), the later one with three
varieties, are found in Québec.
The plants belonging to the genus are from 30 cm to over 3 m high.
Their stems are erect, generally unbranched, at times more or less purple.
Their leaves are mostly cauline, mostly
Their flower heads are
discoid with 5 to 6 series of
They have from 4 to 20 florets
with usually purplish or pinkish corollas
with 5 lobes.
The fruits are dark brown to yellowish
cypselae with a persistent
Their have 10 chromosomes.
The genus belongs to the
In Greek, ευ (eu) means well
and τροchο (trokho) means
wheel, the genus name alluding to the usually whorled leaves of the
species, a bit as the rays of a wheel.