Genus Gutierrezia Composite Family (Asteraceae/Compositae)
Broom Snakeweed
(Gutierrezia sarothrae)
This is a low-growing plant -- usually only about a foot tall.
It has many small slender branches. The species name sarothrae
is a Greek word referring to the broom-like appearance of these
little branches.
When the plant blooms (late summer and fall)
the flower heads are clustered on the outer tips of all the branches
so that the whole plant seems to be covered.
Each flower head is very tiny -- only about 1/4 inch across or less.
They usually have both ray flowers and disk flowers, but only
a few of each.
The plant is also commonly called Matchbrush.
It somewhat resembles rabbitbrush, but rabbitbrush never has any
ray flowers. It also resembles some of the Senecios, but they
generally have larger flower heads.
The genus is named for Pedro Gutierrez, a Spanish botanist of the
nineteenth century (when Spain controlled this part of America).