FLORA OF THE TUSAYAN NATIONAL FOREST 



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palatable to stock. Pingue is poisonous to sheep but luckily 

 they do not eat it when other forage can be obtained. 



The brush areas are found at the lower altitudes, along the 

 Mogollon Rim, often growing in dense clumps with a few scat- 

 tering grasses and weeds underneath them. Shin oak (Quercus 

 grisea), manzanita (Arctostaphylos pungens), Apache plume 

 (FaUugia paradoxa), skunk bush (Rhus trilobata), Ceanothus 



Fig. 1. Transition Zone. An open stand of mature Pinus ponderosa. 



greggii and Eriogonum spp. are the most common shrubs. Since 

 jnost of the shrub or "browse" species are palatable to stock 

 these areas are highly esteemed by stockmen. 



The line of demarcation between the woodland and park types 

 is often indefinite because of the scattering growth of wood- 

 land trees. The herbaceous species common to the woodland 

 are found in the parks. 



The minor characteristic species of the Upper Sonoran zone 

 are Agropyron smithii, Muhleribergia wrightii, Koeleria cristata. 



