' For a written explanation, click on 'corymb' in the Glossary.
Inflorescence axillary and terminal, a pyramidal panicle with flowers ultimately borne in umbels or corymbs of 4-6, the congestion variable with the proximal pair often separated by up to 2 mm from the terminal cluster, the axes thinly golden- or brownish-sericeous inflorescence axes often 2 or 3 in same axil, arrayed vertically bracts 0.5-1 mm long, ovate, appressed, eglandular or. A hogweed umbel, two tiers of umbrella spokes supporting scores of florets. Photograph: Phil GatesMAIN AXIS LONG IT CAN BE DIVIDED INTO 1: SIMPLE RACEME 2: CORYMB 3. 2: BIPAROUS CYME IN THIS TYPE, THE MAIN AXIS ENDS IN FLOWER AND PRODUCES TWO.NameThatPlant.net: corymb images.
Compound Capitulum: Secondary capitulum consists of a single flower surrounded by an involucre (bracts present at the base of the flower) e.g., in echinus, veronica.cyme vs corymb - what is the difference. Borrowed from French cime, cyme ( top, summit ), from the Vulgar Latin cima, from the Latin cma ( young sprout of a cabbage, spring shoots of cabbage ), from the Ancient Greek (k&251 ma, anything swollen, such as a wave or billow fetus, embryo, sprout of a plant ), from Arching overhead are flat, cream corymbs of elder blossom, some as large as tea plates, open tables for any passing insect. From below I can see that the florets have a different underpinning architecture.
Morphologically, it is the modified part of the shoot of seed plants where flowers are formed. Aloe hereroensis, showing inflorescence with branched peduncleAn inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Corymb of Yound Candytuft and C. As in biparous cyme, the inflorescence axis is multipodial, e.g., Hamelia patens. It’s a compound umbel, a flat platform of clusters of small, white florets, supported by stems arranged like spokes of miniature umbrellas, each in turn supported by a spoke of a larger umbrella.
Any flower in an inflorescence may be referred to as a floret, especially when the individual flowers are particularly small and borne in a tight cluster, such as in a pseudanthium.The fruiting stage of an inflorescence is known as an infructescence.Inflorescences may be simple (single) or complex ( panicle). A flower that is not part of an inflorescence is called a solitary flower and its stalk is also referred to as a peduncle. The stalk of each flower in the inflorescence is called a pedicel. The major axis (incorrectly referred to as the main stem) above the peduncle bearing the flowers or secondary branches is called the rachis.
These structural types are largely based on natural selection. These terms are general representations as plants in nature can have a combination of types. 3.2 Meristems and inflorescence architectureInflorescences are described by many different characteristics including how the flowers are arranged on the peduncle, the blooming order of the flowers and how different clusters of flowers are grouped within it.
They serve a variety of functions which include attracting pollinators and protecting young flowers. A bract is usually located at the node where the main stem of the inflorescence forms, joined to the rachis of the plant, but other bracts can exist within the inflorescence itself. Considering the broadest meaning of the term, any leaf associated with an inflorescence is called a bract.
This use is not technically correct, as, despite their 'normal' appearance, these leaves are considered, in fact, bracts, so that 'leafy inflorescence' is preferable. Leafy inflorescences: Though often reduced in size, the bracts are unspecialised and look like the typical leaves of the plant, so that the term flowering stem is usually applied instead of inflorescence. Bracteate inflorescences: The bracts in the inflorescence are very specialised, sometimes reduced to small scales, divided or dissected. Ebracteate inflorescences: No bracts in the inflorescence.
The terminal bud keeps growing and forming lateral flowers. Indeterminate inflorescence: Monopodial (racemose) growth. In inflorescences these two different growth patterns are called indeterminate and determinate respectively, and indicate whether a terminal flower is formed and where flowering starts within the inflorescence. If the inflorescence has a second unit of bracts further up the stem, they might be called an involucel.Leafy inflorescence of Aristolochia clematitis.Plant organs can grow according to two different schemes, namely monopodial or racemose and sympodial or cymose.
The indeterminate patterning of flowers is derived from determinate flowers. Other flowers then grow from lateral buds.Indeterminate and determinate inflorescences are sometimes referred to as open and closed inflorescences respectively. The terminal bud forms a terminal flower and then dies out. Determinate inflorescence: Sympodial (cymose) growth.
In many cases the last true flower formed by the terminal bud ( subterminal flower) straightens up, appearing to be a terminal flower. In an indeterminate inflorescence there is no true terminal flower and the stem usually has a rudimentary end. Based on phylogenetic analyses, this mechanism arose independently multiple times in different species.
When the bract is attached to the stem holding the flower (the pedicel or peduncle), it is said to be recaulescent sometimes these bracts or bracteoles are highly modified and appear to be appendages of the flower calyx. Other plants have the bracts subtend the pedicel or peduncle of single flowers. When the parts fused together are the same, they are connately joined.) Some plants have bracts that subtend the inflorescence, where the flowers are on branched stalks the bracts are not connected to the stalks holding the flowers, but are adnate or attached to the main stem (Adnate describes the fusing together of different unrelated parts.
Some passage forms between the obvious ones are commonly admitted. The other kind of racemose inflorescences can all be derived from this one by dilation, compression, swelling or reduction of the different axes. The main kind of racemose inflorescence is the raceme ( / ˈ r æ s iː m/, from classical Latin racemus, cluster of grapes). When the formation of the bud is shifted up the stem distinctly above the subtending leaf, it is described as concaulescent.Inflorescence of sessile disc florets forming the capitulum Indeterminate or racemose Indeterminate simple inflorescences are generally called racemose / ˈ r æ s ɪ m oʊ s/.
A spadix is a spike of flowers densely arranged around it, enclosed or accompanied by a highly specialised bract called a spathe. It is characteristic of Umbelliferae. An umbel is a type of raceme with a short axis and multiple floral pedicels of equal length that appear to arise from a common point. A racemose corymb is an unbranched, indeterminate inflorescence that is flat-topped or convex due to their outer pedicels which are progressively longer than inner ones. A spike is a type of raceme with flowers that do not have a pedicel.
Secondary axis still dichasial: dichasium (characteristic of Caryophyllaceae) The successive pedicels follow a zig-zag path on the same plane: rhipidium (many Iridaceae) The successive pedicels are arranged in a sort of spiral: cincinnus (characteristic of the Boraginaceae and Commelinaceae) Secondary buds develop alternately on the stem : scorpioid cyme The successive pedicels are aligned on the same plane: drepanium
Compound inflorescences are composed of branched stems and can involve complicated arrangements that are difficult to trace back to the main branch.A kind of compound inflorescence is the double inflorescence, in which the basic structure is repeated in the place of single florets. The single flowers are there replaced by a simple inflorescence, which can be both a racemose or a cymose one. More than two secondary axes: pleiochasiumSimple inflorescences are the basis for compound inflorescences or synflorescences.
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