Cephalocereus columna-trajani

References

1. [1]Desert Tropicals — http://www.desert-tropicals.com/ ↩︎The main focus of the site is succulent plants, but it also contains information on a wide range of other species. Usually at least one good photograph, plus basic information about the plant and its cultivation.
2. [2]Trees and Shrubs of Mexico — Standley P.C. · Smithsonian Institution; Washington · 1926 ↩︎Although dated, it contains a wealth of information on the trees and shrubs of Mexico, including many of their uses. It can be downloaded from the Internet.
3. [3]The Standard Cyclopedia of Horticulture (6 volumes) — Bailey L.H. · The MacMillan Company, Toronto. · 1919 · http://www.biodiversitylibrary.org/ ↩︎Rather dated, but it still contains a wealth of useful information. It can be downloaded from the internet.
4. [4]IUCN Red List of Threatened Species — http://www.iucnredlist.org/ ↩︎A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
5. [5]Food Plants in the Americas: A Survey of the Domesticated, Cultivated, and Wild Plants Used for Human Food in North, — Kermath B.M.; Bennett B.C.' Pulsipher L.M. · 2014 ↩︎A pre-publication draft of an amazing, on-going work first started in 1985. It contains information on more than 3,900 taxa from the Americas - from Arctic regions to the Tropics
6. [6]Cacti Biology and Uses — Nobel, Park S. (Editor) · University of California Press; Berkeley, California · 2002 · ISBN 0-520-23157-0 ↩︎A lot of information about the uses and cultivation of Cacti native to central Mexico