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Banksia lemanniana, the yellow lantern banksia or Lemann's banksia, is a species of flowering plant in the family Proteaceae, native to Western Australia. It generally grows as an open woody shrub or small tree to 5 m (16 ft) high, with stiff serrated leaves and unusual hanging inflorescences .
In the fall, the leaves turn a mix of yellow, gold, and orange. [citation needed] The flowers are fragrant, white, produced in Wisteria-like racemes 15–30 cm long. Flowering is in early summer (June in its native region), and is variable from year to year, with heavy flowering every second or third year.
Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. [1]
Aster yellows is a chronic, systemic plant disease caused by several bacteria called phytoplasma. [1] The aster yellows phytoplasma (AYP) affects 300 species in 38 families of broad-leaf herbaceous plants, primarily in the aster family, as well as important cereal crops such as wheat and barley.
Gardenia volkensii is a multi-stemmed shrub or small tree with short, rigid branches. [1] [2] The branches form a dense rounded canopy and may touch the ground. The bark is a pale grey colour. [1] Shiny spoon-shaped leaves are found clustered at the end of knobbly branchlets. [2] The trumpet-shaped flowers start off white, but turn yellow with age.
This tree is mostly deciduous during the winter, but can start growing back leaves early during warm snaps in the winter. Yellow flowers grow in drooping catkins. In female red willows, the catkins turn into tufts of cottony seeds, which are windborn, often in large quantities, for 2-3 weeks in the spring. [4] Flowering Time: Dec--Jun [5]
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
[8] [9] The leaf petiole exudes milky sap when severed. [10] The leaves turn yellow in autumn. The flowers are relatively inconspicuous: small, yellowish green or reddish green and opening as leaves emerge. Male and female flowers are usually on separate trees although they may occur on the same tree. [citation needed]