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Floral pigments in Hydrangea are affected by the presence of aluminum ions in the soil, causing changes in flower color from red, pink, blue, light purple or dark purple. [ 4 ] There has been one non-chemical example found within Caesalpinioideae , a single sub-family of Fabaceae where the folding of petals cause changes to the color patterns ...
Empetrum nigrum is a low growing, evergreen shrub with a creeping habit. [4] The leaves are 3–6 millimetres (1 ⁄ 8 – 1 ⁄ 4 inch) long, arranged alternately along the stem. The stems are red when young and then fade to brown.
Other common names, such as Anglo-Saxon singrēne, Modern English sigrim, sil-green, etc. and aye-green, [17] [20] [21] refer to its longevity. William Fernie tells a tale in support of this: History relates that a botanist tried hard for eighteen months to dry a plant of the House Leek for his herbarium, but failed in this object.
Trillium erectum, the red trillium, [4] also known as wake robin, [5] purple trillium, [6] bethroot, [7] or stinking benjamin, [8] is a species of flowering plant in the family Melanthiaceae. The plant takes its common name "wake robin" by analogy with the European robin , which has a red breast heralding spring.
The Elm cultivar Ulmus 'Myrtifolia Purpurea', the Purple Myrtle-leaved Elm, was first mentioned by Louis de Smet of Ghent (1877) as Ulmus myrtifolia purpurea. [1] An U. campestris myrtifolia purpurea Hort. was distributed by Louis van Houtte in the 1880s, [2] by the Späth nursery, Berlin, in the 1890s and early 1900s, [3] and by the Hesse Nursery, Weener, Germany, till the 1930s.
Lamium purpureum grows with square stems to 5–20 centimetres (2–8 in), [4] rarely 40 cm, in height. [5] The leaves have fine hairs, are green at the bottom and shade to purplish at the top; they are 2–4 centimetres (3 ⁄ 4 – 1 + 1 ⁄ 2 in) long and broad, with a 1–2 cm petiole (leaf stalk), and wavy to serrated margins.
The young leaves near the growing tip stand erect; older ones are reflexed downward, and the oldest wither and turn brown, hanging around the lower trunk like a Hawaiian skirt. Eventually the tip of the trunk develops a 2 ft (0.61 m) long spike of white, purplish-tinged flowers, each blossom about 4 in (12.7 cm) across.
Angelica atropurpurea is a perennial plant that grows to 6 ft (180 cm) tall. [4] The erect, branching stem is purple, smooth, hollow, and sturdy. The compound leaves are bipinnate, with 3 to 5 leaflets per leaf. The total width of a lower leaf may be up to 2 ft (61 cm), and the leaflets are 0.75–4.5 in (1.9–11.4 cm) long and 0.5–2.5 in (1 ...