www.arthurleej.com

Anchor text: Arthur Lee Jacobson: Trees of the Washington State Capitol Campus

Wikipedia: Ulmus americana

Anchor text: Pineapple weed - ''Matricaria discoidea''

Wikipedia: Matricaria discoidea

Wikipedia: Lincoln Park (Seattle)

Anchor text: Arthur Lee Jacobson website

Wikipedia: Sonchus

Wikipedia: Prunus serrulata

Wikipedia: Lamium galeobdolon

Anchor text: ''Chilean Fire-tree'' description by Arthur Lee Jacobson

Wikipedia: Embothrium coccineum

Wikipedia: Ulmus 'Frontier'

Wikipedia: Ulmus × hollandica 'Pioneer'

Wikipedia: Ulmus 'Morton'