Silk-oak is native to the eastern coast of Australia. In its native range it reaches a height of 115 feet, with a trunk 4 feet in diameter. It is planted for ornament in urban areas, parks, and shopping centers. The leaves are up to 1 foot long and resemble fern fronds, their underside is covered by whitish hairs that give them a silky texture. Flowers are golden-yellow and appear in long inflorescences on one side of the twig. Fruits are dark capsules, about three-quarters of an inch long, with a long filament at the end. It fowers generally in spring, the author has only seen flowers in one tree in Aguadilla and has not observed fruits. The generic name honors the English naturalist Charles Francis Greville (1749-1809). The species name refers to the size of the mature tree.

The photographed tree is east of the Chardón Building. There are other trees in the Civil Engineering parking lot.

Grevillea robusta (Proteraceae)