This library page is still growing. It is presently a list, with links if available, of books, papers or presentations by or involving Keeper Trout. 


  Our former domain at largelyaccurateinformationmedia was purchased by someone who added some sort of malware that now responds to the download links in our older PDFs.

Please do not use any links to that site. All PDF copies are available for free through us and have been replaced with newer copies lacking those old URLs. Please download new copies to replace the pre-existing ones.

It was recently brought to my attention that our book PDF links stopped working. The files are all present at the specified URLs but the links to them were for some reason not connecting and are giving an error message that the files can’t be found. While I puzzle over this and correct it, here is a simple set of direct links to copies of those same files (my thanks to Endlessness for letting me know!):

Cactus Alkaloids

Cactus chemistry by species

Cactus chemistry by species – Light

The Genus Desmodium

Pachanoi or pachanot?

San pedro book with pachanoi or pachanot addendum

Some Simple Tryptamines

Some other succulents

Opening words from Sacred Cacti

Duplicate copies of most of these are also freely available at

An amazing book by a good friend needs to be mentioned

Garden of Eden by Snu Voogelbreinder.
  The first printing has been entirely sold. A PDF is now being made available by Snu for a fair price.

 Trout's Notes library Garden of Eden

A recent article

I do not yet have permission to post a PDF of this article but a read-only copy is now available online.

The origin of 2,5-dimethoxy-4-methoxyamphetamine (DOM, STP) by KeEper Trout & Paul F. Daley. DOI: 10.1002/dta.3667

A recent podcast interview by Joey Santore

 Presentations that are available online

Lophophora; A Genus in Decline
  YouTube video of Keeper Trout’s second presentation at EGA in 2011

  Presented in a draft form at ICS8 in 2010 and in a final version at the 2011 EGA.
  [YouTube video]
[Other videos from EGA]

Trout's Notes library lagid

Mescal; An Ethnobotanical Trainwreck
  A video of Keeper Trout’s presentation at the 50th anniversary Ethnopharmacological Search for Psychoactive Drugs conference at Tyringham Hall in 2017 (depicted above as the featured image). (For unknown reasons, an editor decided to change the title of my talk long after the fact; hence the ‘peculiar’ retitling of the video. Compare the new video title with the original on the opening slide.) 

[Vimeo video]
  [Other presentations from the same conference.]

A print version of the proceedings (1967 and/or 2017) is available through

Mescal; an ethnobotanical train-wreck

Huisachillo Trouble in Texas?
  10 mb PDF of the Powerpoint accompanying the talk.
  Presented at ICS7 in 2009 & again in 2010 after being updated to its present form.

Trout's Notes library

San Pedro
  PDFs of the corresponding Powerpoints accompanying the talks.

  Presented at WVC 2011 (11 mb) and EGA 2011 (15 mb). The presentations overlap but are not identical.

Trout's Notes library

Educational web articles or projects

Associated plants project at Cactus
(Entry page for both Astrophytum asterias & Lophophora)

Astrophytum asterias–Associated plants
  Direct link to this ongoing project at the CCI site.

Lophophora species–Associated plants
  Direct link to this ongoing project at the CCI site.

Pachanoi or Pachanot?
  Fun & educational article.
  [Link] [PDF 6.8 mb]
  The original PDF version of “Pachanoi or Pachanot?” is now bundled with the free San Pedro book PDF.

San Pedro
  A tabular PDF summary to accompany the talks by that name which were given at EntheoGenesis Australis and the Women’s Visionary Congress.

Books, booklets & PDFs

in the digital library

(DATE-e indicates an electronic publication or release rather than paper.)

Acacia species reported to contain Tryptamines and/or Beta-carbolines.
  Illustrated 2003 revision with addendum.
  Printed copies of the 2003 edition were only produced in Oz in limited numbers. It featured an additional color cover and inclusion of additional material from Mulga.
This work is being made available by popular request. It is VERY outdated material.

    [PDF 2003-e 12 mb]

Trout's Notes library

Ayahuasca: Alkaloids, Plants & Analogs (2004-e)
  The unpublished 2004 color 2nd edition of Ayahuasca & Ayahuasca Alkaloids, is now retitled, reformatted into html and graciously being hosted on-line by the great folks at Erowid.

Trout's Notes library

Ayahuasca Analogues and Plant-Based Tryptamines: The Best of The Entheogen Review 1992-1999 [co-editor, with D. Aardvark and J. DeKorne] (2000)
  This was a compendium of previously published articles by multiple authors.
  [PDF is at Erowid]

Trout's Notes library Ayahuasca Analogs


Cactus Alkaloids (2013-e)
  [2013 PDF 27.7 mb]
  Published in large part in 1997 as Appendix A to Sacred Cacti.

Trout's Notes library C13 2013

  [Chemical synonym cross-listing from The Cactus Alkaloids.]

Cactus Chemistry by Species (1996/1999/2007-e/2014-e)
2014 Intensely illustrated color version [PDF 237 mb.]

Trout's Notes library Cactus Chemistry By Species

  [Species and synonyms list from Cactus Chemistry By Species]

Cactus Chemistry by Species light (2014-e)
  DOI: 10.13140/RG.2.1.4715.8886
Photograph-free version of the previous book to enable easier use in research work.


Desmanthus leptolobus (2004-e)
  A web-based educational page.
This page is being revised and a nicer version will replace it in the future

Trout's Notes library

Mucuna notes (2023 draft)

[2023 draft Trout’s Notes on Mucuna (rough draft) & Trout’s Notes on Mucuna (rough draft) ]

These notes were excerpted from an old project on Leguminosae chemistry that was never completed.
All entries are still very rough and only semi-completed but it has been suggested this is of value to put online as-is pending completion. Dated to 8 Mar 2023; updated revisions will be re-dated.

The Genus Desmodium (1997/2004-e)
  [2004 PDF]

Trout's Notes library

Pachanoi or Pachanot(2012-e)
  Fun & educational article .
  [HTML full version]
[Abridged PDF 6.8 mb; adapted from the LAIM site version. Our LAIM website is now offline.]

   The PDF of “Pachanoi or Pachanot?” is also now merged with the San Pedro book PDF.

Trout's Notes library Pachanoi or Pachanot

Sacred Cacti: Botany, Chemistry, Cultivation & Utilization (Narayan 1997; Better Days Publishing 1999/2001/2015-e)
  This book is now on THIS website *in its entirety* (i.e all four volumes will be ONLINE and that process is already complete. Revised editions of the San Pedro book and Cactus Chemistry By Species are coming online asap.). Some of the older introductory comments are still in need of updating but the complete book is online.

Trout's Notes library

San Pedro (2011-e)
  Analysis handout (PDF accompanying EGA and WVC talks)

San Pedro & Related Trichocereus Species (2005/2013-e)
  Originally this book was just a portion of one chapter within the pages of Sacred Cacti. The third revision saw it enlarged to a point that it merited its own publication.

Trout's Notes library

Some Simple Tryptamines (2002/2007/2013-e)

Trout's Notes library

Known omissions & errata 2007


Some Other Succulents (2004-e)
Extracted from the third edition of Sacred Cacti.
This booklet is now 18-years old and needs much updating to bring it back to being current.

Trout's Notes library


  The Cactus Alkaloids
    (cumulative references for all four volumes of Sacred Cacti, fourth edition)

  Cactus Chemistry Summary: By Species

  Sacred Cacti, third edition

  Some Simple Tryptamines, second edition


Papers & Articles in the digital library


  Keeper Trout. 2018. “Mescal, peyote and the red bean; a peculiar conceptual collision in early modern ethnobotany,”pages 234–256, in G.T. Prance et al. (eds.) Ethnopharmacological Search for Psychoactive Drugs, Vol. 2, Synergetic Press, Santa Fe.


  Martin Terry & Keeper Trout. 2017. “Regulation of peyote (Lophophora williamsii: Cactaceae) in the USA: A historical victory of religion and politics over science and medicine.” Journal of the Botanical Research Institute of Texas, 11(1): 147–156.
[736 Kb PDF]


  Keeper Trout & Martin Terry. 2016. “Decline of the Genus Lophophora in Texas.”, Chapter 1 in Bia Labate & Clancy Cavner (eds.) “Peyote: “History, Traditions, Politics, and Conservation” ABC-CLIO/Praeger Publishers


  Molly T. Klein, M. Kalam, Keeper Trout, Norma Fowler & Martin Terry. 2015. “Mescaline concentrations in three principal tissues of Lophophora williamsii (Cactaceae): Implications for sustainable harvesting practices.” Haseltonia 20: 34–42.
[~4 Mb PDF]


  Martin K. Terry, Teodoso Herrera, Keeper Trout, Bennie Williams & Norma Fowler. 2014. “Limitations to natural production of Lophophora williamsii (Cactaceae) III. Effects of repeated harvesting at two-year intervals for six years in a South Texas population.” Journal of the Botanical Research Institute of Texas,  8 (2): 541–550.
(1.9 Mb PDF)

  Keeper Trout, Blake Edwards & Martin Terry. 2014. “The Peyote Crisis & some Suggestions. Revisited.”
[Article is on-line at the CCI website


  M. Abul Kalam, Molly T. Klein, Diana Hulsey, Keeper Trout, Paul Daley & Martin Terry. 2013.   “A preliminary report of mescaline concentrations in small regrowth crowns vs. mature crowns of Lophophora williamsii (Cactaceae); cultural, economic, and conservation implications.”  Journal of the Botanical Research Institute of Texas, 7 (1): 435–440.
[~1.8 Mb PDF]

  Martin Terry & Keeper Trout. 2013. “Cultivation of peyote: a logical and practical solution to the problem of decreased availability.” Phytologia, 95 (4): 314–320,
[119 Kb PDF]  [Same PDF from]


  Martin K. Terry, Teodoso Herrera, Keeper Trout, Bennie Williams & Norma Fowler. 2012. “Limitations to natural production of Lophophora williamsii (Cactaceae) II. Effects of repeated harvesting at two-year intervals in a South Texas population.” Journal of the Botanical Research Institute of Texas, 6 (2): 567–577.
[~1.5 Mb PDF]

  Martin K. Terry, Keeper Trout, Bennie Williams & Teodoso Herrera. 2012. “Cultivation of peyote by Native Americans: Past, present and future.”
Presentation given by Dr. Terry at the 2012 annual meeting of the Society for Economic Botany.
[YouTube video]

  Keeper Trout. (2012-e) “Pachanoi or Pachanot?” (Current version)
    [HTML full version] [Abridged PDF 6.8 mb]
    The PDF of “Pachanoi or Pachanot?” is also available combined with the San Pedro book PDF.


  Martin K. Terry, Teodoso Herrera, Keeper Trout, Bennie Williams & Norma Fowler. 2011. “Limitations to Natural Production of Lophophora williamsii (Cactaceae) I. Regrowth and Survivorship Two Years Post Harvest in a South Texas Population.”  Journal of the Botanical Research Institute of Texas, 5 (2): 661–675.

  Keeper Trout & Burnt Norton. 2011. “Peyote Regrowth Following Proper Harvesting Practices.” Illustrated article online at Erowid. (June 2011) 
An electronic version can be found on-line at Appearing in print in the June 2011 Erowid extracts, 20: 8–11.


  Olabode Ogunbodede, Douglas McCombs, Keeper Trout, Paul Daley & Martin Terry. 2010. “New mescaline concentrations from 14 taxa/cultivars of Echinopsis spp. (Cactaceae) (“San Pedro”) and their relevance to shamanic practice.” Journal of Ethnopharmacology, 131 (3): 356–362.  
   [ Link 1  ] [Link 2 ]
Images to accompany Ogunbodede et al. 2010 ]

  Keeper Trout & Burnt Norton. 2010. “Peyote in the Wilds of Texas.”
    Illustrated article is online at Erowid. (Nov 2010-e)


  Keeper Trout. 2008.  “Old Hair and Tryptamines.” The Entheogen Review, 16 (4): 146–149 (Dec 2008)


  Keeper Trout. 2005. “Z practik Keepera Trouta.” Kaktusy, 4: 8–9. [Grafting article was kindly translated by Jan Říha]


  Keeper Trout & Mark Hoffman. 2001. “Faith, Belief, and the Peyote Crisis.”
    [This was rewritten so heavily by Mark Hoffman that I would have preferred the credit to be given as Hoffman & Trout 2001.] Entheos, 1(2) (Winter 2001)


  Keeper Trout by Brett Lothian in 2017 (Nicely illustrated by BL).
    [Trichoserious website]

  Keeper Trout by Lex Pelgar in 2017 (video).
    [Psychedelic salon podcast

In the comments added in the site’s text, their reference to Tepker should have read “which Trout mentioned” rather than “in which Trout was mentioned”.