| Hieracium silenii | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Hieracium |
| Species: | H. silenii |
| Binomial name | |
| Hieracium silenii Norrl., 1878 | |
Hieracium silenii is a species of flowering plant belonging to the family Asteraceae. [1]
It is native to Northern Europe. [2]
Hieracium , known by the common name hawkweed and classically as hierakion, is a genus of flowering plant in the family Asteraceae, and closely related to dandelion (Taraxacum), chicory (Cichorium), prickly lettuce (Lactuca) and sow thistle (Sonchus), which are part of the tribe Cichorieae. Hawkweeds, with their 10,000+ recorded species and subspecies, do their part to make Asteraceae the second largest family of flowering plants. Some botanists group all these species or subspecies into approximately 800 accepted species, while others prefer to accept several thousand species. Since most hawkweeds reproduce exclusively asexually by means of seeds that are genetically identical to their mother plant, clones or populations that consist of genetically identical plants are formed and some botanists prefer to accept these clones as good species whereas others try to group them into a few hundred more broadly defined species. What is here treated as the single genus Hieracium is now treated by most European experts as two different genera, Hieracium and Pilosella, with species such as Hieracium pilosella, Hieracium floribundum and Hieracium aurantiacum referred to the latter genus. Many members of the genus Pilosella reproduce both by stolons and by seeds, whereas true Hieracium species reproduce only by seeds. In Pilosella, many individual plants are capable of forming both normal sexual and asexual (apomictic) seeds, whereas individual plants of Hieracium only produce one kind of seeds. Another difference is that all species of Pilosella have leaves with smooth (entire) margins whereas most species of Hieracium have distinctly dentate to deeply cut or divided leaves.
A dry roadside dotted with small, ¾ inch red orange flowers, interspersed with very similar yellow ones, and often the white of daisies, is a good sign that you are in Hawkweed country.
Hieracium subpellucidum is a species of flowering plant belonging to the family Asteraceae.
Hieracium subcaesium is a species of flowering plant belonging to the family Asteraceae.
Hieracium bifidum is a species of flowering plant belonging to the family Asteraceae.
Hieracium philanthrax is a species of flowering plant belonging to the family Asteraceae.
Hieracium pellucidum is a species of flowering plant belonging to the family Asteraceae.
Hieracium patale is a species of flowering plant belonging to the family Asteraceae.
Hieracium lepistoides is a species of flowering plant belonging to the family Asteraceae.
Hieracium karelorum is a species of flowering plant belonging to the family Asteraceae.
Hieracium incurrens is a species of flowering plant belonging to the family Asteraceae.
Hieracium hjeltii is a species of flowering plant belonging to the family Asteraceae.
Hieracium fulvescens is a species of flowering plant belonging to the family Asteraceae.
Hieracium coronarium is a species of flowering plant belonging to the family Asteraceae.
Hieracium crispulum is a species of flowering plant belonging to the family Asteraceae.
Hieracium coniops is a species of flowering plant belonging to the family Asteraceae.
Hieracium chlorellum is a species of flowering plant belonging to the family Asteraceae.
Hieracium caespiticola is a species of flowering plant belonging to the family Asteraceae.
Hieracium caesiomurorum is a species of flowering plant belonging to the family Asteraceae.
Hieracium hethlandiae, known as Cliva Hill hawkweed, is a species of hawkweed native to Shetland. The species was first published in 1946.
Geraldine Anne Allen is a botanist, professor of biology, and herbarium curator at the University of Victoria in British Columbia, Canada. She obtained formal education at the University of British Columbia and Oregon State University, earning a Doctor of Philosophy degree in botany and plant pathology from the latter in 1981. During her career, she has authored or co-authored over 50 publications, including genera chapters for Flora of North America and the Jepson Manual. She also has authored several species of the Erythronium genus.