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A ray flower is a two- or three-lobed, strap-shaped, individual flower, found in the head of most members of the Asteraceae. [ 15 ] [ 16 ] The corolla of the ray flower may have two tiny, vestigial teeth, opposite to the three-lobed strap, or tongue, indicating its evolution by fusion from an ancestral, five-part corolla.
An Oligocene (34 – 23 Mya) pollen is known for Asteraceae and Goodeniaceae, and seeds from Oligocene and Miocene (23 – 5.3 Mya) are known for Menyanthaceae and Campanulaceae respectively. [5] According to molecular clock calculations, the lineage that led to Asterales split from other plants about 112 million years ago [ 6 ] or 94 million ...
Xerochrysum bracteatum, commonly known as the golden everlasting or strawflower, is a flowering plant in the family Asteraceae native to Australia. Described by Étienne Pierre Ventenat in 1803, it was known as Helichrysum bracteatum for many years before being transferred to a new genus Xerochrysum in 1990.
[clarification needed] [citation needed] The show there in the flowering season is a rich treat for the lovers of floriculture : for almost every variety can be seen growing in two large blocks or masses which lead from the road to the dwelling-house, and form a complete field of the Dahlia as a foreground to the house. Mr.
Aster is a genus of flowering plants in the family Asteraceae. As of August 2024 Plants of the World Online accepts 186 species. [1] For species formerly placed in genus Aster, see List of Aster synonyms.
Thistle is the common name of a group of flowering plants characterized by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all over the plant – on the stem and on the flat parts of the leaves. These prickles protect the plant from herbivores.
Ragweeds are flowering plants in the genus Ambrosia in the aster family, Asteraceae.They are distributed in the tropical and subtropical regions of the Americas, especially North America, [2] where the origin and center of diversity of the genus are in the southwestern United States and northwestern Mexico. [3]
Trixis californica , the American threefold [1] or American trixis, is a species of flowering plant in the family Asteraceae.It is native to the southwestern United States in California, Arizona, New Mexico, and Texas, and in Mexico in the states of Baja California, Chihuahua, Coahuila, Durango, Nuevo León, Sinaloa, Sonora, Tamaulipas, and Zacatecas.