Ambrosia dumosa or white bursage is a form of ragweed, is a highly branched shrub 20 to 90 cm in height. The younger stems are covered with soft gray-white hairs. Approximately
obovate leaves are 1 to 3 times
pinnately compound or deeply
lobed and generally clustered on short branches. The leaves are 0.5 to 4 cm long and also covered in soft gray-white hairs.
Ambrosia dumosa becomes dormant during drought, losing all of its leaves to prevent water loss by transpiration;
drought deciduous. During this time, it can still be recognized by the presence of longitudinal stripes on smaller stems. Like other types of Ambrosia, this is a ragweed, wind-blown pollen from burro-weed can cause serious allergic reactions. Increasing cases in Mojave Desert as the population grows from Joshua Tree, CA to Las Vegas, NV. ==References==