Synonym: Hemizonia fasciculata Annual plant to 1 m tall, flowers
yellow with five ray flowers and usually six disk flowers that
have black anthers. Southwestern California to central Baja
California. The Fascicled Tarweed used to be recognized in the
genus Hemizonia, but recent taxonomic research has split the
genus Hemizonia into various segregate genera. In San Diego
County, all of the Tarweed/Tarplant species that used to be in
Hemizonia are now recognized in the genera: Deinandra and
Centromadia. There are six species in the genus Deinandra in San
Diego County, of which four are considered to be sensitive
species. The most common species in this genus in our area is D.
fasciculata and it is especially abundant from late spring to
summer.