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No. Grevilleas are native to Australia, and perfectly suited for some of its native Australian marsupials. Possums enjoy the nectar they can get from the grevillea blossoms, and these flowers are not even remotely poisonous.
The scientific or taxonomic name would be Grevilleaspp.
Yes. The grevillea is native to Australia.
Grevillea glossadenia was created in 1975.
Grevillea shiressii was created in 1986.
Grevillea phylicoides was created in 1810.
Grevillea baileyana was created in 1986.
Grevillea buxifolia was created in 1793.
Grevillea pteridifolia was created in 1809.
Grevillea venusta was created in 1810.
Grevillea didymobotrya was created in 1856.
Grevillea obtusiflora was created in 1830.