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Asteraceae (/ ˌ æ s t ə ˈ r eɪ s i. iː,-ˌ aɪ /) is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of extant species
Aster amellus is the type species of the genus and the family Asteraceae. [1] The name Aster comes from the Ancient Greek word ἀστήρ (astḗr), meaning 'star', referring to the shape of the flower head. Many species and a variety of hybrids and varieties are popular as garden plants because of their attractive and colourful flowers.
Both species have four verticils (sepals, petals, stamens and carpels), which are defined by the differential expression of a number of homeotic genes present in each verticil. This means that the sepals are solely characterized by the expression of A genes, while the petals are characterized by the co-expression of A and B genes.
The petals, or inner tepals, are always separate, sometimes with dots, spots and various colors. The labellum is the middle petal, is larger in size than the two lateral petals, and its shape is extremely variable: it often has three lobes, or unusual shapes, and with fleshy bumps or ridges or a basal spur, and often with a different coloration ...
Replacement of a tap root system by a fibrous root is seen in onions, tuberose (Polyanthes tuberosa), grasses, etc. Fibrous roots from normal-stem nodes are seen in grasses like maize, sugarcane, bamboo, etc. Fibrous roots from nodes help in the survival of the plant and thus in vegetative reproduction, when the plant's base is damaged or cut ...
Abies ← [a] Abronia ← Acacia ← Acanthus ← Actinidia ← Actinotus ← Aerangis ← Aeranthes ← Aerides ← Aeschynanthus ← Agalmyla ← Agastache ← Agrostemma ← Aichryson ← Alloplectus ← Alopecurus ← Alphitonia ← Ammocharis ← Ammophila ← Androstephium ← Anemone ← Angophora ← Antirrhinum ← Aphyllanthes ← Archontophoenix ← Arctostaphylos ← Ardisia ← ...
“Roses are the perfect embodiment of love, but their colors have different meanings, which can help customers choose the perfect arrangement for their Valentine,” explains Alfred Palomares ...
Zinnia's composite flowers consist of ray florets that surround disk florets, which may be a different color than the ray florets and mature from the periphery inward. [7] The flowers have a range of appearances, from a single row of petals to a dome shape. Zinnias may be white, chartreuse, yellow, orange, red, purple, or lilac. [5]