21 August 2008 added partially revised bright angel plant trail guide, incorporating many, but not all, of the updates from the may 2008 fieldwork.
8 October 2007 added fieldwork dates and summary of list changes with time for bright angel trail.
7 October 2007 added partial species pages for species up to #37 that didn't have a full species page, also for #41, 45, 51, 58, 63 and 77, and the off-trail Fallugia and penstemon like P. barbatus. Disabled links to species pages that don't exist. 54 out of the 96 taxa now have a full or partial species page.
27-28 September 2007 added pages on species #55, 78, 86, 87, 89, and the off-trail not-numbered Selaginella mutica.
26 September 2007 added analysis page on Chrysothamnus nauseosus (=Ericameria nausosa) Subspecies With Glabrous Involucres At And Near The Grand Canyon, including species #17.
24-5 September 2007 added pages on species #9-16 from the bright angel trail.
23 September 2007 added guide to bright angel trail beginning at trailhead, and first 8 species pages; added checklist for hermits rest to grandview area; updated main plants page to include both pages.
21 September 2007 updated resources page to include stockert 1967 and phillips 1979.
16 September 2007 updated resources page to include usda plants and the Jepson Manual.
15 September 2007 added checklist of hermits rest to grandview, and updated resources page to include Huisinga et al new book, and southwest colorado wildflower page, and to update some bad urls.
23 September 2006 minor updates to asteraceae checklist and elevation ranges and bloom times.
22 September 2006 moved update log from znet to tchester.org; added plants index page; added three new pages: Grand Canyon National Park Asteraceae Checklist With Additional Information; Asteraceae Elevation Ranges And Bloom Times At The Grand Canyon; and White Prairie Daisy, Symphyotrichum falcatum, on the Bright Angel Trail
The following updates were all made on my znet site:
20 July 2001 corrected typo in pedometer accuracy (repetition of "downhill"), thanks to input from an anonymous reader.
30 November 2000 added art's last name to 1985 hike.
27 February 2000 added link to haughey's supai pages.
10 November 1999 added sherry's dm1 writeup.
26 October 1999 added more explanation to key.
22 October 1999 added steve's input about the improvement to the "terrifying descent" near beaver falls.
14 October 1999 added the wonderful input from barefoot@well.com on mooney and his tunnels.
8 October 1999 updated new hance writeups thanks to jane's comments; added bit more on heat problems to bright angel trail and corrected 3 typos.
6 October 1999 added new hance trail overview, and the 990926, 850629 and 860526 hikes.
2 October 1999 added bright angel 971020 and 990925 hikes.
23 September 1999 added two car travel logs 5/31/96 and 6/2/96. Linked pedometer page to gc finally!
18 September 1999 added experimental verification of what causes pedometer observed accuracy.
27 May 1999 added travel times from kingman and peach springs to supai fact sheet.
9 May 1999 added steve's observations about mooney tunnels.
11 October 1998 added page about origin of tunnels at Mooney Falls. Started update page for this site.
Copyright © 1996-1999 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:
http://tchester.org/gc/site/update_log.html
Comments and feedback: Tom Chester
Last update: see top entry above.