Their inflorescences form dense flower-like struc… Aster flower diagram. In plants of the family Asteraceae, what appears to be a single flower is actually a cluster of much smaller flowers. The sunflower or daisy family, Asteraceae, comprises of approximately 10% of all angiosperm species. Receptacle usually a fleshy flat disc, sometimes an elongated club-shaped structure. a Top view of a gerbera head.b Cross section of a gerbera head showing marginal ray (R), intermediate trans (T), and central disc (D) flowers that are all attached to a single, expanded receptacle (Re). Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. Beneath the petals are green leaf-like structures called sepals. Request PDF | Don't be fooled: false flowers in Asteraceae | The sunflower or daisy family, Asteraceae, comprises of approximately 10% of all angiosperm species. Tbe sbape of tbe collar bas been found taxonomically useful in Senecioneae (Drury, 1975; Wetter, 1983). Within a single head flowers may be (1) all tubular, (2) tubular and filiform, (3) tubular and ligulate, (4) allligulate. Flowers contain vital parts including petals which form flowers. Important Types. Compound 4. All have five fused petals. The big thing about Composite Family flower structure is that the head brings together several to very many tiny flowers, or florets, so that they look like just one larger flower. ASTERACEAE (compositae) G SELVAM I.M.SC.BOTANY BHARTHIDASAN UNIVERSITY, TRICHY TAMILNADU 2. The inflorescence of Asteraceae, one of the largest and most successful families of flowering plants, is a specialized, complex structure called the capitulum. The overall appearance of the cluster, as a single flower, functions in attracting pollinators in the same way as the structure of an individual flower in some other plant families. Affinities 5. Cyathium 5. Composite flowers or Asteraceae commonly referred to as the aster, daisy, composite, or sunflower family) is a very large and widespread family of flowering plants (Angiospermae). Asteraceae, King & Robertson (1970) included structure of tbe antber collar. On the basis of form of flowers the heads are of three types. The composite inflorescence, capitulum, or flower head in Asteraceae assembles multiple flowers into a single, highly compressed structure. [citation needed] In terms of numbers of species, the Asteraceae are rivaled only by the Orchidaceae. Asteraceae thrive in a range of conditions, but many hail from dry regions of the world. Characters of Asteraceae 2. Flower structure in ten Asteraceae species: considerations about the importance of morpho-anatomical features at species and tribal level | SpringerLink Inflorescence: Type # 1. Asteraceae (Sunflower Family) As is true throughout the Bay Area and California, the Asteraceae or Sunflower family has more species than any other family of flowering plants. The family has more than 23,600 currently accepted species, spread across 1,620 genera and 13 subfamilies. The sunflower or daisy family, Asteraceae, comprises of approximately 10% of all angiosperm species. Asteraceae or Compositae (commonly referred to as the aster, daisy, composite, or sunflower family) is an exceedingly large and widespread family of flowering plants (Angiospermae).. 1. Sometimes, the 3:2 arrangement is reversed, with 2 tips on the tongue, and 0 or 3 tiny teeth opposite the tongue. Sometimes a ray flower has 2 lobes. History of gerbera. Racemose Inflorescence 2. Organization of flower heads in Asteraceae. There is a member of the Asteraceae family to suit every garden. The aggregation of many small flowers together in compact arrays is an adaptation to facilitate, in effect, an “assembly line” type of pollination. Economic Importance 4. ADVERTISEMENTS: The following points highlight the six major types of inflorescence. Gerbera flower types. Male Flower Parts The male part of the flower is called the stamen. CLASSIFICATION SYSTEMATIC POSITION Class - Dicotyledons Sub-class - Gamopetalae Series - Inferae Order - Asterales Family - Asteraceae 3. bracts are smaller . 1. The leaf margins are frequently serrate or dentate, but they can be entire. Sep-Oct 2007;68(5):361-78. Asteraceae . In some Eupatorieae, botb tbe collar sbape as well as tbe pattern of wall tbickenings in tbe collar epidermis bave proven of taxonomic value (Robinson & King, 1977). Verticillaster 6. 2017 Mar;130(2):327-337. doi: 10.1007/s10265-017-0904-x. [Interrelation between the flower structure and composition of the pollinator groups for Dipsacaceae and Asteraceae with externally similar anthodia] Zh Obshch Biol . Cymose Inflorescence 3. Ray flower (A), disc flower (B) and schema of the flowers organization in a typical Asteraceae capitula (C), … They come in a wide variety of colors and sizes are easy to grow and bloom predictably and reliably. Very efficient. In this thesis, we carried out an investigation into the role of auxin in flower head development and Normally capitula contain two kinds of flowers: the ray or ligulate flowers and the disc flowers. This structure consists of, in most cases, many florets that are highly compressed and that resemble a solitary flower (Gillies et al., 2002; Jeffrey, 2009; Zhao et al., 2016). A frequent arrangement of the Asteraceae capitulum consists of peripherally located ray flowers which are highly specialized in pollinator attraction, and disc flowers which assume the reproductive function, thereby improving the chances of reproductive success and facilitating a more flexible basis for breeding system evolution than does a single flower (Lane, 1996; Jeffrey, 2009). Many are very attractive to wildlife – the nectar-rich flower heads attract pollinating insects, while birds enjoy the seeds. Ray flower (A), disc flower (B) and schema of the flowers organization in a typical Asteraceae capitula (C), extracted from Greenish (1920). 2016: phylogeny of Calyceraceae). FAMILY-COMPOSITAE (ASTERACEAE) (Prepared by D. A. Cooke, except certain genera as noted.) In plants of the family Asteraceae, what appears to be a single flower is actually a cluster of much smaller flowers. Here are some of the key plants in the family. The sunflower plant family (Asteraceae) is characterized by head-like inflorescences (capitula) that resemble single solitary flowers but are typically composed of tens to hundreds of flowers that are specialized in structure and function. Distribution of Asteraceae 3. Most flowers contain male and female parts. ADVERTISEMENTS: In this article we will discuss about:- 1. Characters of Asteraceae: Mostly herbs or shrubs or rarely trees; leaves alternate rarely opposite, exstipulate rarely stipulate; inflorescence capitulum or head surrounded by involucre of bracts; ray and disc florets, flower 2012; Denham et al. Asteraceae can be either simple- or compound-leaved, opposite or alternate. ... form a structure called a corolla. Their inflorescences form dense flower-like structures, pseudanthia or false flowers that may combine hundreds of individual flowers into a single structure. All have five fused petals. I: 1424 COMPOSITAE than the leaves and differ from them in shape and texture. 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