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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.
Since freezing belongs to dehydration stresses, cold acclimation process is associated with an enhanced accumulation of osmolytes (sugars, proline, polyamines, and hydrophilic proteins). [3] The loss of frost resistance occurs after warming. Rapid temperature fluctuations during winter deharden trees and increase the risk of spring damage. [5]
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 pedunculata is a perennial, growing from a spongy rhizome. The plant is often low-growing, but can reach a height of 6 inches (15 cm). The leaves are 1-5.5 cm long, cordate (heart-shaped) to deltate-ovate (oblong-triangular), scalloped or toothed, and glabrous or hairy. [4] They are summer deciduous.
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 betonicifolia is an easy plant to grow, and adaptable to different soil types as long as it get sufficient moisture and at least half shade or more in a garden situation. It is good for rockeries. It can be quite vigorous in heavier, moisture retentive soils and forms clumps to about 30 cm (12 in) diameter. It is self-seeding. [7]
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]
Viola praemorsa is a species of violet known by the common names canary violet, [3] Astoria violet, [4] yellow montane violet, and upland yellow violet. [5] Description