Definition of "pinus"

I have been invited to see the garden of Baron Zanoli, situated on the high road from Monza to Milan, in which I am told there are fine exotic trees and shrubs, and especially a rich collection of pinuses.

1839, J. C. Loudon, The Gardener's Magazine, page 420

As the generality of pinuses grow by nature into magnificent and gigantic forest-trees, they should, I think, be planted in our parks as well as in our flower-gardens, shrubberies, and lawns.

1853, George Greenwood, The tree-lifter, page 265