Plant Species of the Bright Angel Trail:
Arizona thistle, Cirsium arizonicum var. nidulum
See Plant Guide to Bright Angel Trail for an introduction to this page, especially the Introduction To These Species Pages.
This page is just a shell to hold my photographs and reference information for now, so that readers can see the photographs and this taxon. The identification status, voucher info, and discussion of the species will be added in the future.
Identification status: .
From a SEINet search on 29 September 2007, there are vouchers of this species from the Coconino County portion of the Grand Canyon. The nearest are at: ; and . Note that there may be additional vouchers at other herbaria not available through SEINet.
First occurrence on Bright Angel Trail: mile 0.63, elevation 6445 feet (1964 m); first off-trail occurrence is just off-trail at mile 0.12, elevation 6781 feet (2067 m)
Number of plants along Trail: at least 10 plants were found in at least 9 different locations in September 2007.
From 5 September 2007, mile 0.12; Cirsium arizonicum var. nidulum on the left; Ericameria arizonica on the right:
From 5 September 2007, mile 0.63:
See Resources for Grand Canyon Flora for further information on most of these references. Entries in the second column are either the name used in that source or a page reference. The name is linked to online pages when available. If a given reference does not contain this taxon, the entry is either left blank or contains a hyphen.
Family Asteraceae Scientific Name Cirsium arizonicum var. nidulum 1987 Grand Canyon Flora Name Cirsium nidulum 1987 Grand Canyon Flora page 31 SEINet Image Page Cirsium arizonicum USDA Plants Cirsium arizonicum Flora of North America Cirsium arizonicum var. arizonicum Jepson Manual for California treatment Cirsium nidulum Jepson Manual illustration page - Kearney and Peebles Name Cirsium nidulum Kearney and Peebles Page # 953 Vascular Plants of AZ name Vascular Plants of AZ volume: page Huisinga et al 2006 name - Huisinga et al 2006 page numbers - Epple Name Cirsium arizonicum Epple description page # 266 Epple pix # 569 McDougall 1964 name Cirsium nidulum McDougall 1964 page # 236 Brian 2000 Name Phillips 1979 name Cirsium arizonicum Phillips 1979 page # 87 Stockert 1967 name - Stockert 1967 page # -
Copyright © 2007-2012 by Tom Chester.
Permission is freely granted to reproduce any or all of this page as long as credit is given to me at this source:
Comments and feedback: Tom Chester
Last Update: 9 July 2012