Fringed Thistle (Cirsium clavatum var americanum)

Fringed Thistle (Cirsium clavatum var americanum)

Common Names: Fringed Thistle, Rocky Mountain Fringed Thistle
Synonyms: Cirsium centaureae, Cirsium clavatum var americanum
Taxonomy: Aster (Asteraceae)
Habit: Forb (biennial or perennial)
Size: up in 3 feet
Flowers: Jun, Jul, Aug, Sep
Leaves: alternate, basal
Fruit: cypsela, aschene
Description:
Cirsium clavatum is a biennial or perennial herb up to 3 feet (100 cm) tall, blooming only once before dying. Leaves have thin spines along the edge, much smaller than those of related species. There are several to many flower heads, with white or pale pink disc florets but no ray florets. It occurs in the Southern Rocky Mountain region of Wyoming, Colorado and New Mexico. While Bigelow’s tansyaster is very similar to the hoary tansyaster, it is much more restricted to habitat and range.
Distribution: CO, UT, WY
Habitat:

References:

Thistles of Colorado

If you love flowers, plants, birds and animals, then you are in the right place. I love nature photography and combined with my love of birds, flowers and travel I have decided to create a place to present photographs and information on my favorites. This is a revision of my previous website traveltoeat.com since I become old (and fat) and I have become more interested in photography than eating.

I live in Las Vegas but I travel frequently in the southwest, California and in fact around the world. While Las Vegas would seem to be an unusual choice with regards to plants and birds it is an unusually busy place due to Pacific Migration Flyway which comes through Las Vegas. Since this is a desert, the birds are concentrated in the many springs, seeps, lakes and parks in and around Las Vegas, making for really great birding.

Kurt Buzard MD

Since the previous blog focused on travel and eating, there will be a fair amount of focus on history beautiful architecture and food. However, both in the past and today I am always interested in a good garden, zoo, safari or hike.My idea of a perfect day is to be surrounded by flowers, insects, animals and birds, I hope my photographs and descriptions will inspire you in your own travels and hikes.

Copyright © 2023 Kurt Buzard MD