Hieracium scouleri
Encyclopedia
Hieracium scouleri is a species of hawkweed
known by the common name Scouler's woollyweed. It is native to western North America from Manitoba
to California
, where it grows in a variety of mountainous habitats. This plant produces a basal rosette of long, narrow leaves 10 to 20 centimeters long, which are generally hairy to bristly. It bolts an erect stem 30 to 70 centimeters tall which bears the inflorescence
. The flower heads
have large, curling bract
s with glandular hairs or bristles, long, protruding disc florets and bright yellow ray florets. The achene
is about 3 millimeters long.
There are several varieties. One variety, var. albertinum, is often treated as a separate species, Hieracium albertinum
.
Hieracium
Hieracium known by its common name Hawkweed and long ago by its classical name hierakion which comes from the ancient Greek hierax, "a hawk"...
known by the common name Scouler's woollyweed. It is native to western North America from Manitoba
Manitoba
Manitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...
to California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, where it grows in a variety of mountainous habitats. This plant produces a basal rosette of long, narrow leaves 10 to 20 centimeters long, which are generally hairy to bristly. It bolts an erect stem 30 to 70 centimeters tall which bears 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...
. The flower heads
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....
have large, curling bract
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture...
s with glandular hairs or bristles, long, protruding disc florets and bright yellow ray florets. The achene
Achene
An achene is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate and indehiscent...
is about 3 millimeters long.
There are several varieties. One variety, var. albertinum, is often treated as a separate species, Hieracium albertinum
Hieracium albertinum
Hieracium albertinum, known as Western Hawkweed or Houndstongue Hawkweed, is a species of the Hieracium genus that is very similar to Hieracium albiflorum with white flowers but differs in that the flower heads are clustered and the leaves, stems and bracts are covered in a thick layer of hairs...
.