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[citation needed] Some bulbs – such as tulips – need cold winters to bloom, while others – such as freesia – can survive a freezing winter. [citation needed] Many domestic plants are assigned a hardiness zone that specifies the climates in which they can survive. Winter gardens are dependent upon the cultivation of winter-hardy plants.
This is a list of species in the plant genus Viola, often known as violets or pansies. Viola is the largest genus in the family Violaceae, containing over 680 species. [1] Although similarly named, neither African violets nor dogtooth violets are closely related to the true violas.
Viola is one of about 25 genera and about 600 species in the large eudicot family Violaceae, divided into subfamilies and tribes. While most genera are monotypic, Viola is a very large genus, variously circumscribed as having between 500 and 600 species. Historically it was placed in subfamily Violoideae, tribe Violeae.
Viola sempervirens, known by the common names redwood violet and evergreen violet, is a species in the genus Viola. It is native to the West Coast of the United States and British Columbia, Canada, and grows in closed-cone pine forest, California mixed evergreen forest, redwood forest, and Douglas fir forest communities. It has leathery purple ...
The flower of Viola reichenbachiana is bisexual, containing both male and female reproductive structures. [4] It has 3 or 5 narrow, non-overlapping petals that are a signature dull purple. [1] [4] The flower typically has 5 small, pointed sepals, 5 stamens, and 1 carpel. [1] These flowers can range from 1.5 to 2 cm across. [4]
Viola labradorica, commonly known as alpine violet, [2] American dog violet, [3] dog violet [4] or Labrador violet, [3] [5] [6] is a perennial herbaceous flowering plant. It is native to Greenland, eastern Canada, and the eastern United States. [7] The plant sold as Viola labradorica by nurseries is Viola riviniana. [8]
Viola odorata is a species of flowering plant in the family Violaceae native to Eurasia. The small hardy herbaceous perennial is commonly known as wood violet , [ 1 ] sweet violet , [ 2 ] English violet , [ 2 ] common violet , [ 2 ] florist's violet , [ 2 ] or garden violet .
Viola glabella prefers moist, well-drained soil and can grow in part shade. Acidic and neutral soils are suitable for Viola glabella, which prefers a pH between 6 and 6.5, and becomes chlorotic if the pH is too high. [1] Young leaves and flower buds are edible, raw or cooked, but the yellow flowers can cause diarrhoea. [2]
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