Table of Contents
What are the characteristics of the Asteraceae family?
Key identifying characteristics for Asteraceae include an inflorescence that is a composite head with disc florets, (ray florets may or may not be present), and an achene-like cypsela (fruit) with a fringe of hairs or papus. The leaf arrangement may be alternate or opposite, though rarely whorled.
What makes Asteraceae unique?
The distinguishing characteristic of Asteraceae is their inflorescence, a type of specialised, composite flower head or pseudanthium, technically called a calathium or capitulum, that may look superficially like a single flower.
Which of the following plant belongs to family Asteraceae?
Characteristics of the Asteraceae Family It includes a number of well-known species, such as chicory, sunflower, lettuce, coreopsis, dahlias and daisy, as well as a number of plants of medicinal significance, such as wormwood, chamomile and dandelion [4].
What features are used to describe and identify a plant?
Identifying a landscape or garden plant requires recognizing the plant by one or more characteristics, such as size, form, leaf shape, flower color, odor, etc., and linking that recognition with a name, either a common or so-called scientific name.
In which of the following family the characteristic feature Tetramerous flowers are present?
Family Liliaceae
(a) Trimerous flower. (b) Tetramerous flower.
What is a defining feature of the aster family Asteraceae )?
Flowers. The most obvious and outstanding general feature of Asteraceae is that the flowers are grouped characteristically into compact inflorescences (heads) that superficially resemble individual flowers. Each such head is ordinarily subtended by an involucre of small modified leaves (bracts).
Which of the following characters are found in Asteraceae?
Family Asteraceae (Compositae) contain inferior ovary, i.e., stamen, calyx, corolla are localized above ovary level, syngenesious androecium(stamens), i.e., all anthers are united but filaments are free, and basal placentation, ie ovule seems to arise from the base of loculus.
What are three leaf characteristics that can be used for plant identification?
having pine or needles rather than leaves.
Which of the following plants have Tetramerous flowers?
Evening primrose is the example of tetramerous flower. Sunflower,rose,neem etc…
What is economic importance of Asteraceae family?
Economic Importance of Asteraceae. The family Asteraceae contributes several food, dye, oil and medicine yielding plants. Also this family includes large number of ornamental plants. Lactuca sativa is the plant widely grown for vegetable.
Why Asteraceae is the most advanced family in Dicots?
Answer. Answer: The family asteraceae is regarded as highest evolved among the Dicotyledons because it contains about 32000 species, 13 sub families and 1900 genera and take the first place in the kingdom plantae. It is a family of plants that produces flowers.
What are two characteristics of leaves that can be used for identifying plants?
Another important leaf characteristic for plant identification is the edge or margin of a leaf or leaflet. Leaves have either smooth edges, called entire, or small notches or “teeth” along the margin.
What are the characteristics of flower?
A typical flower consists of four types of floral leaves called sepals, petals, stamens and carpels in distinct whorls normally known as calyx, corolla, androecium and gynoecium respectively. A flower in which all the four whorls are present (Sepal, Petal, Carpels, Stamens) are called as complete.
How many species are there in Asteraceae?
Asteraceae is a large family of flowering plants, with more than 1,620 genera and 23,600 species. The only other plant family with a comparable number of species is Orchidaceae, the orchid family, in the order Asparagales.
What is the mode of reproduction in the Chinese Asteraceae?
Modes of reproduction in the Chinese Asteraceae are known only fragmentarily. As regards the world diversity of the family, only about 12% of genera have been studied using cytoembryology to identify the reproduction system. In 3%, agamospermy was found to occur.
Do Asteraceae have fibrous roots?
Members of the family Asteraceae generally produce taproots, but sometimes they possess fibrous root systems. Some species have underground stems in the form of caudices or rhizomes. These can be fleshy or woody depending on the species.
Do Asteraceae have anemophily and pollination?
Many members of Asteraceae are pollinated by insects, which explains their value in attracting beneficial insects, but anemophily is also present (e.g. Ambrosia, Artemisia ). There are many apomictic species in the family. Seeds are ordinarily dispersed intact with the fruiting body, the cypsela.