Cirsium douglasii was created in 1838.
Eriogonum douglasii was created in 1856.
Carex douglasii was created in 1839.
Solanum douglasii was created in 1852.
Cirsium ownbeyi was created in 1982.
Cirsium andersonii was created in 1874.
Cirsium loncholepis was created in 1917.
Cirsium crassicaule was created in 1893.
Cirsium ochrocentrum was created in 1874.
Cirsium scariosum was created in 1841.
Cirsium rhothophilum was created in 1931.
Cirsium mohavense was created in 1893.
Cirsium ciliolatum was created in 1900.