Mojave River Valley Museum
Several canyons, located within
the New York Mountains, contains a unique assemblage
of plants and an interesting blending of plant
communities not found elsewhere within the
Preserve. Besides the small stand white fir trees (see
section below), an “enriched”
or interior chaparral community, is found
in Caruthers, Keystone, and Live Oak Canyons.
Manzanita (Arctostaphylos pungens), oaks (Quercus
chrysolepis and Q. turbinella), silktassel (Garrya
flavescens), single-leaved ash (Fraxinus anomala)
western service-berry (Amelanchier utahensis),
holly-leafed redberry (Rhamnus ilicifolia), yerba
santa (Eriodictyon angustifolium), and desert olive
(Forestiera neomexicana) are all species that occur in
the chaparral habitats of California and Arizona.
Chaparral is typically a fire tolerant community, supporting
intense fire due to volatile compounds in
the plants, but recovering over time to a similar
community. Calcicolous scrub, a community that
grows only highly calcic soils, is also found within
the New York Mountains.
White Fir Populations:
Small populations of Rocky
Mountain white fir (Abies concolor concolor), relict
populations from the late Pleistocene-early
Holocene period can be found in the upper reaches
of the New York Mountains and on Clark Mountain.
These pockets of white fir trees probably exist due
to favorable conditions at the microsite level, with
humidities in these small areas sufficient to favor
sufficiently low evapotranspiration rates (Latting and
Rowlands 1995). These north-facing canyons are
wetter and cooler than the surrounding desert and
shelter these relict stands.
Joshua Tree Woodlands:
The most obvious feature
of Cima Dome, next to its unique geological form,
Joshua tree (Yucca brevifolia jaegeriana). The
Joshua tree woodland covering the dome and surrounding
areas is considered to be the largest and
most dense stand within the tree’s range, covering
in excess of 150 square miles and probably containing
more than a million trees. Although methods of
aging of the trees are still subject to some disagreement,
some of the trees with base diameters in
excess of three feet and heights of 30 feet or more,
may be 500–1,000 years old. The Joshua tree forest
on the Cima Dome has not been surveyed and
mapped for age distribution, nor are there any
quantitative data to indicate the status of new
seedling recruitment into the population. Joshua
source - NPS
Providence Mountains - Lanfair Valley
Vegetation: The predominant natural plant communities are Creosote bush series on fans and lower mountain
slopes, Singleleaf pinyon series on higher mountain slopes, and White fir series on the highest mountains. ...
White Fir Dominated Habitat
Mature white fir stands, normally monotypic, with more than 80 percent occurring as white fir,
are found throughout California; from the Klamath Mountains along the north coast to the south
coast mountain ranges, and in interior ranges from the Warner Mountains in the Great Basin to
the Clark, Kingston, and New York mountain ranges in interior southern California ...
Joshua Tree Woodland
Joshua Trees tell you are truly in Mojave country. Though can grow 50 feet tall, they are not
really trees but a species of yucca. They prefer flat or gradually sloping areas. The world's largest
concentration of Joshua trees grows on Cima Dome in the Mojave National Preserve. ...