Cereus hexagonus

References

1. [1]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.
2. [2]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.
3. [3]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
4. [4]The Cactus Family — Anderson E.F. · Timber Press; Portland, Oregon · 2001 · ISBN 0-88192-498-9 ↩︎An excellent work, giving botanical descriptions of virtually all the cacti, together with their range (but not their habitats) and sometimes also a photo. it also contains a long chapter detailing the many uses of cacti and another on cultivation..
5. [5]The Cactaceae — Britton N.L. & Rose J.N. · The Carnegie Institution of Washington; Washington. · 1920 · http://www.biodiversitylibrary.org ↩︎An immense work in 4 volumes. Many of the botanical names are out of date, of course, but the book contains a wealth of information about the plants. It can be downloaded from the Internet.
6. [6]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
7. [7]Enciclopedia de las Plantas Útiles del Ecuador — de la Torre, L., Navarrete H., P. Muriel M., Macía M.J. & Ba · Herbario QCA de la Escuela de Ciencias Biológicas de la Pontific · 2008 · ISBN 978-9978-77-135-8 ↩︎
8. [8]Cornucopia II — Facciola. S. · Kampong Publications, California. · 1998 · ISBN 0-9628087-2-5 ↩︎The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.