Hakea mitchellii was created in 1846.

California. It is home to 8 species of venomous snakes, all Rattlesnakes:

Southern Pacific Rattlesnake (Crotalus viridis helleri)

Great Basin Rattlesnake (Crotalus viridis lutosus)

Northern Pacific Rattlesnake (Crotalus viridis oreganus)

Western Diamondback Rattlesnake (Crotalus atrox)

Red Diamondback (Crotalus ruber)

Sidewinder (Crotalus cerastes)

Speckled Rattlesnake (Crotalus mitchellii)

And last but not least, the Mojave Rattlesnake (Crotalus scutalatus)

Florida comes in second with six species of venomous snakes, three Rattlesnakes(Eastern Diamondback, Timber, and Pygmy) and three others(Copperhead, Water Moccasin, and Coral Snake).

the sidewinder (Crotalus cerastes),speckled rattlesnake (C. mitchellii), Mojave rattlesnake, western rattlesnake (C. viridis), Hopi Rattlesnake, Midget Faced Rattlesnake, and Great Basin Rattlesnake

Crotalus atrox is the western diamondback rattlesnake.