Joshua tree series
Section: shrb Series Dominated by Shrubs
Series formation: 
Series height:<12 m
Series canopy cover:?
Series ground layer:?
Elevation range (lower):700
(upper):   1800
Wetland information:[not available]
Upland information: Uplands:gentle alluvial fans. Soils colluvial, alluvial-derived.
Reference:Johnson (1976), MacMahon (1988), Paysen et al. (1980), Thorne (1982), Turner (1982a, 1982b), Vasek & Thorne (1977).
Comments:Joshua tree has a large range and grows with many species, so much so that Rowlands (1978) questions the existence of a plant community. He suggests that it is better to consider all Joshua tree populations as a component of other grasslands and scrubs o matter the Joshua tree density. Because Joshua tree is common and con-spicuous in some areas and uncommon in others, this approach defines a series to include stands of den se populations. Trees other than Joshua tree can be present in this series, and Joshua tree can be a component of other series as well. Hanes (1976) describes vegetation types in the San Gabriel Mountains including a Joshua tree community. Phillips et al. (1980) present data on two stands in Joshua Tree National Monument which they call Joshua tree woodland. In both stands California juniper dominates over Joshua tree, and in one, singleleaf pinyon and desert scrub oak have more cover than Joshua tree. T ese stands are better considered as belonging to the California juniper series. Three varieties of Joshua tree are proposed: the arboreal Yucca brevifolia var. brevifolia from a single trunk and Y. b. var. jeageriana with several trunks, and shrubby Y. b. var. herbertii . NDDB information suggests that variety shrub is usually associated with stands better treated as belonging to the California juniper series. The Jepson Manual does not recognize these varieties.
Plot based descriptions:Vasek & Barbour (1977) describe a stand north of Cima in San Bernardino Co. MojD.
Series Association:[not available]
FormationExtremely xeromorphic deciduous shrubland
Geographical associated regions: View Regions for: Joshua tree series
Representative Image: View Representative Photograph for: Joshua tree series
Common species: View common species for: Joshua tree series

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