Ageratina herbacea
Encyclopedia
Ageratina herbacea is a species of flowering plant in the daisy family
known by the common names fragrant snakeroot and Apache snakeroot. It is native to the southwestern United States and northern Mexico, where it grows in several habitat types. This is a perennial herb growing a green, fuzzy stem from a woody caudex
to heights between about 50 and 70 centimeters. The leaves are yellow to green or grayish and are triangular to heart-shaped. The inflorescence
is a cluster of fuzzy flower heads
under a centimeter long containing long, protruding white disc florets and no ray florets. The fruit is an achene
a few millimeters long with a rough bristly pappus
.
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...
known by the common names fragrant snakeroot and Apache snakeroot. It is native to the southwestern United States and northern Mexico, where it grows in several habitat types. This is a perennial herb growing a green, fuzzy stem from a woody caudex
Caudex
A caudex is a form of stem morphology appearing as a thickened, short, perennial stem that is either underground or near ground level . It may be swollen for the purpose of water storage, especially in xerophytes...
to heights between about 50 and 70 centimeters. The leaves are yellow to green or grayish and are triangular to heart-shaped. 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...
is a cluster of fuzzy flower heads
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....
under a centimeter long containing long, protruding white disc florets and no ray florets. The fruit is an achene
Achene
An achene is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate and indehiscent...
a few millimeters long with a rough bristly pappus
Pappus (flower structure)
The pappus is the modified calyx, the part of an individual disk, ray or ligule floret surrounding the base of the corolla, in flower heads of the plant family Asteraceae. The pappus may be composed of bristles , awns, scales, or may be absent. In some species, the pappus is too small to see...
.