Cirsium rydbergii

Cirsium rydbergii
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Cynareae
Genus: Cirsium
Species: C. rydbergii
Binomial name
Cirsium rydbergii
Petr.
Synonyms[1]

Cirsium lactucinum Rydb.

Cirsium rydbergii (Rydberg's thistle or alcove thistle) is North American species of perennial plants in the sunflower family, found in the Colorado Plateau and Canyonlands regions of the southwestern United States, in the States of Utah and Arizona.[2]:111

Cirsium rydbergii is a large perennial herb sometimes reaching a height of 300 cm (10 feet). It has no or very few branches, and pinnately lobed leaves up to 90 cm (3 feet) long with many sharp spines but usually very few hairs. flower heads are spiny on the sides, containing white, pink, or purple disc florets but no ray florets.[3]

References

  1. The Plant List, Cirsium rydbergii Petr.
  2. Canyon Country Wildflowers, Damian Fagan, 2nd ed., 2012, Morris Bush Publishing, LLC. in cooperation with Canyonlands Natural History Association, ISBN 978-0-7627-7013-7
  3. Flora of North America, Rydberg’s or alcove thistle . Cirsium rydbergii Petrak


This article is issued from Wikipedia - version of the 6/8/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.