Yowbarb Note: So for anyone who doesn't know, guild is a term from permaculture. The article posted on the next page uses the term "Guild."
In permaculture a guild is an co-located assemblage of plants and animals (polyculture) that is designed to increase yields without increasing labor. In a guild elements are positioned for mutual benefit to reduce the need for labor or external inputs. A guild develops over time on a trajectory which increases yields without increasing labor. Guilds may change over time, or require periodic disturbance to maintain desired function. Guilds are frequently patterned off of natural vegetation, as natural vegetation is assumed to reflect the natural potential of a particular bioregion and landscape position. Since every hardiness zone, microclimate within that zone and indigenous flora/fauna create different pressures, almost every single guild will be different and unique in its specifics. A permaculture design may incorporate any number of guilds (depending on the site), which in turn interact with one another. Guilds are similar to companion planting, but much more complex in terms of number of elements, identified interactions, and time scale.
The term "guild" is also sometimes incorporated into the names of local permaculture organizations (ex: Hamilton Permaculture Guild, Sierra Permaculture Guild, etc.)
[ continue http://www.appropedia.org/Guilds
...http://thegrownetwork.com/a-perennial-food-guild-for-the-arid-american-southwest/A Perennial Food Guild for the Arid American Southwest
Edible Permaculture Plants You Can Grow in Arid Regions