Native Plants
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Cirsium rydbergii
Cirsium rydbergii Petr.
Rydberg's Thistle, Alcove Thistle
Asteraceae (Aster Family)
Synonym(s): Cirsium lactucinum
USDA Symbol: CIRY
USDA Native Status: L48 (N)
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Plant Characteristics
Duration: PerennialHabit: Herb
Size Notes: Up to about 10 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: White , Pink , PurpleBloom Time: May , Jun , Jul , Aug , Sep
Bloom Notes: No ray florets present, only disc florets.
Distribution
USA: AZ , UTWeb Reference
Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Cirsium rydbergii in USDA PlantsFNA: Find Cirsium rydbergii in the Flora of North America (if available)
Google: Search Google for Cirsium rydbergii
Metadata
Record Modified: 2018-12-11Research By: CBR