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:
“Both classically- and romantically-minded spirits—inasmuch as these two species always exist—occupy themselves with a vision of the future: but the former do so out of a strength of their age, the latter out of its weakness.”
—Friedrich Nietzsche (1844–1900)
“Prohibition will work great injury to the cause of temperance. It is a species of intemperance within itself, for it goes beyond the bounds of reason in that it attempts to control a man’s appetite by legislation, and makes a crime out of things that are not crimes. A Prohibition law strikes a blow at the very principles upon which our government was founded.”
—Abraham Lincoln (1809–1865)
“Not only does every animal live at the expense of some other animal or plant, but the very plants are at war.... The individuals of a species are like the crew of a foundered ship, and none but good swimmers have a chance of reaching the land.”
—Thomas Henry Huxley (1825–95)