Populus trichocarpa Torr. & A.Gray

Western Cottonwood

Large tree to about 30 m tall with spreading branches. Young branches with yellow-grey bark, slightly angled. Buds aromatic and highly resinous. Leaves broadest below the middle, mostly 8-12 cm long but much larger on strong shoots, ovate to lanceolate, acuminate, finely toothed, dark green above, white beneath with reticulate venation, bases rounded to truncate. Leaf stalks 3-8 cm long. Male catkins 4-6 cm long, female 6-8 cm. Capsule pubescent, 3-valved.

North America

VIC: Maroondah Reservoir Park.

Source: Spencer, R. (1997). Salicaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.

Populus trichocarpa 'Androscoggin'

(p. trichocarpa × p. maximowiczii) a fast-growing hybrid that was introduced to Canberra by the Forestry and Timber Bureau in about 1936. Specimens act: Westbourne Woods; Forrest Primary School.

Populus trichocarpa 'Rochester'

Semi rust-resistant hybrid introduced to Canberra by the Forestry and Timber Bureau in about 1936. Specimens act: Forestry House, Yarralumla n side. Populus laurifolia Ledeb., Laurel Poplar is occasionally offered; it is a broad-crowned tree 15-20 m tall with slender new shoots. Leaves on long shoots lanceolate to lanceolate-acuminate, 6-13cm long, finely glandular-serrate, whitish below and slightly pubescent at least on midrib. Leaf stalks short; leaves on short shoots elliptic-ovate with stalks longer. Capsule 2-3 valved, slightly pubescent. It differs from p. trichocarpa in having closely glandular-toothed leaf margins.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Malpighiales
family       Salicaceae
genus        Populus L.