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compact cobwebby thistle
Scientific Name: Cirsium occidentale var. compactum
Family: Asteraceae
Category: Dicot
Growth: Forb/herb
Duration: Biennial
Other Names:
Cobweb Thistle (Cirsium occidentale)
Cirsium occidentale, commonly known as cobweb thistle or cobwebby thistle, is a fascinating plant found in specific regions. This page provides information about its characteristics, distribution, and other interesting details.
Considerations for Pets
- The text mentions that this is a thistle, which are often spiny and prickly.
Considerations for Children
- The text mentions that this is a thistle, which are often spiny and prickly.
Taxonomy and Nomenclature
- Scientific Name: Cirsium occidentale (Nutt.) Jeps.
- Common Names: Cobweb thistle, cobwebby thistle
- Variety: Cirsium occidentale var. compactum Hoover (Compact Cobwebby Thistle)
Distribution and Habitat
- Cirsium occidentale var. compactum is endemic to California.
- It is found in coastal bluffs.
Morphological Characteristics
- Cirsium occidentale is a perennial plant growing to 1 meter (3ft 3in).
- The "cobwebby" name comes from the cotton-like substance found in its flower.
- Some varieties, such as Cirsium occidentale var. compactum, are compact.
- It is described as a spiny plant with a tightly-packed head of purplish-red disk florets.
Ecological Role
- Unlike many introduced exotic thistles, this native species is not considered a troublesome weed.
Additional Information
- Cirsium occidentale is hardy to zone (UK) 9.
- The flowers are hermaphrodite, containing both male and female organs.
- Cirsium occidentale var. compactum is designated as a California Native Plant Society (CNPS) Rare plant.
- Cirsium occidentale var. compactum is considered endangered in California.