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A globe flower is a perennial herb that features yellowish-orange or white flowers on top of tall stems. "Globe flower" is the common name for a group of plants that are classified in the plant genus Trollius. Collectively, the group contains about 30 species, most of which are native to Asia, Europe, and North America. The globe flower is typically planted in a flower bed or border. It is generally maintenance free, but is susceptible to powdery mildew, which is a fungal disease.
The globe flower is named after its round flower shape. The American globe flower is known scientifically as Trollius laxus, while the European globe flower is called Trollius europaeus. A species of globe flower that grows in Asia is Trollius asiaticus.
Generally, globe flowers grow in cool temperate grasslands and forests. They are usually found in damp areas that receive large amounts of rain. These plants are known for their ability to thrive in extremely soggy soil.
The growing conditions for this plant should be similar to the natural conditions that it is exposed to. For example, the soil should be extremely moist and poorly draining. It should have a heavy consistency, similar to clay. The pH of the soil can vary since this plant can thrive in both acidic and alkaline conditions.
It is recommended to place this plant in an area that is exposed to direct sunlight at the start of the day, and then shaded in the afternoon. Regular watering is required to prevent the plant from drying. It is recommended to occasionally add fertilizer to improve flowering.
A commonly cultivated species is the golden queen variety of Trollius chinensis. It grows about 3 feet (1 m) in height and spreads about 20 inches (50 cm). The foliage consists of dark-green leaves that are divided into several leaflets. It has an upright appearance with tall stems that hold the globe-shaped, yellow-orange flowers.
The flowers of most of the species are yellowish-orange, with the exception of Trollius laxus Salisb, which has a white flower. Usually, the flowers bloom from late spring to mid-summer. They don't fully blossom; instead the petals remain in a compact circular arrangement that is about 2 inches (5 cm) in diameter.
A common problem that affects this plant is powdery mildew. The fungal infection causes stunted growth and reduced flowering. It usually appears as a white dusting on the leaves, shoots, and flowers.
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