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H1a, higher than 15 °C (59 °F), applies to tropical plants permanently under glass in heat; while H7, below −20 °C (−4 °F), applies to very cold-tolerant plants such as heathers. Most outdoor plants in the UK fall within the range H4, −10 to −5 °C (14 to 23 °F) (hardy in the average winter) to H5, −15 to −10 °C (5 to 14 °F ...
Cold increases cell membrane permeability [4] and makes the cell shrink, as water is drawn out when ice is formed in the extracellular matrix between cells. [2] To retain the surface area of the cell membrane so it will be able to regain its former volume when temperature rises again, the plant forms more and stronger Hechtian strands .
When newly opened, Viola flowers may be used to decorate salads or in stuffings for poultry or fish. Soufflés, cream, and similar desserts can be flavoured with essence of Viola flowers. The young leaves are edible raw or cooked as a mild-tasting leaf vegetable. The flowers and leaves of the cultivar 'Rebecca', one of the Violetta violets ...
Viola imbricata, is a species of flowering plant in the family Violaceae.It is endemic to the Andes in Central Chile.It was described in 2024. [1] It is circumscribed within subgenus Neoandinium, which is composed by circa 140 species commonly known as Andean rosulate violas, distributed between the equator and southern Patagonia. [2]
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]
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 centimetres (0.39–2.17 in) 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]