Species
Some of the species in the section are:
- Populus alba: white poplar (northwest Africa, southern Europe, east to central Asia)
- Populus adenopoda: Chinese aspen (China, south of P. tremula)
- Populus davidiana
- Populus grandidentata: bigtooth aspen (eastern North America, south of P. tremuloides)
- Populus ningshanica
- Populus qiongdaoensis
- Populus rotundifolia
- Populus sieboldii: Japanese aspen (Japan)
- Populus tomentosa, Chinese white poplar (China)
- Populus tremula: Eurasian aspen (northern Europe and Asia)
- Populus tremuloides: American aspen (northern and western North America)
- Populus wulianensis
Natural hybrids between species in the section include:
- Populus × canescens: grey poplar, P. alba × P. tremula
- Populus × hopeiensis: P. davidiana × P. tomentosa
- Populus × pseudotomentosa: P. adenopoda × P. tomentosa
Read more about this topic: Populus Sect. Populus
Famous quotes containing the word species:
“There are acacias, a graceful species amusingly devitalized by sentimentality, this kind drooping its leaves with the grace of a young widow bowed in controllable grief, this one obscuring them with a smooth silver as of placid tears. They please, like the minor French novelists of the eighteenth century, by suggesting a universe in which nothing cuts deep.”
—Rebecca West (1892–1983)
“Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals the fixed species; through many species the genus; through all genera the steadfast type; through all the kingdoms of organized life the eternal unity. Nature is a mutable cloud which is always and never the same.”
—Ralph Waldo Emerson (1803–1882)
“The principle of avoiding the unnecessary expenditure of energy has enabled the species to survive in a world full of stimuli; but it prevents the survival of the aristocracy.”
—Rebecca West (1892–1983)