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Knautia Drymeia
''Knautia drymeia'', commonly known as the Hungarian widow flower, is a herbaceous perennial plant species in the family Caprifoliaceae, that grows in Central and Southeastern Europe. Taxonomy This species was first formally described by Austrian botanist Johann Heuffel in his work ''Flora 39'' in 1856. There are a few recognized subspecies of ''Knautia drymeia'': * ''Knautia drymeia'' subsp. ''centrifrons'' (Borbás) Ehrend. * ''Knautia drymeia'' subsp. ''drymeia'' * ''Knautia drymeia'' subsp. ''intermedia'' (Pernh. & Wettst.) Ehrend. * ''Knautia drymeia'' subsp. ''nympharum'' (Boiss. & Heldr.) Ehrend. * ''Knautia drymeia'' subsp. ''tergestina'' (Beck) Ehrend. Description This upright-growing perennial widow flower can reach from 40 to 60 centimetres of height and is easily recognizable because of its leaf rosette, that gives rise to multiple flowering stems. The species's stem is hirsute, with leaves growing along the entire length. Its oppositely arranged simple and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristle
A bristle is a stiff hair or feather (natural or artificial), either on an animal, such as a pig, a plant, or on a tool such as a brush or broom. Synthetic types Synthetic materials such as nylon are also used to make bristles in items such as brooms and sweepers. Bristles are often used to make brushes for cleaning purposes, as they are strongly abrasive; common examples include the toothbrush and toilet brush. The bristle brush and the scrub brush are common household cleaning tools, often used to remove dirt or grease from pots and pans. Bristles are also used on brushes other than for cleaning, notably paintbrushes. Bristles are distinguished as ''flagged'' (split, bushy ends) or ''unflagged;'' these are also known as '' flocked'' or ''unflocked'' bristles. In cleaning applications, flagged bristles are suited for dry cleaning (due to picking up dust better than unflagged), and unflagged suited for wet cleaning (due to flagged ends becoming dirty and matted when wet). In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floral Zone
A floral zone is an area with similar distributions of plant species, usually a horizontal belt determined by elevation.Death Valley Expedition (1891), Historic Expeditions, Smithsonian Museum of Natural History/ref> In a historic report on plant distribution in the United States, '' The Death Valley Expedition: A Biological Survey of Parts of California, Nevada, Arizona, and Utah'', naturalist Clinton Hart Merriam describes ''“Most of the desert shrubs are social plants and are distributed in well-marked belts or zones, the vertical limits of which are fixed by the temperature during the period of growth and reproduction.”'' See also * Altitudinal zonation Altitudinal zonation (or elevational zonation) in mountainous regions describes the natural layering of ecosystems that occurs at distinct elevations due to varying environmental conditions. Temperature, humidity, soil composition, and solar r ... * Life zone References Botany {{botany-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyploidy
Polyploidy is a condition in which the biological cell, cells of an organism have more than one pair of (Homologous chromosome, homologous) chromosomes. Most species whose cells have Cell nucleus, nuclei (eukaryotes) are diploid, meaning they have two sets of chromosomes, where each set contains one or more chromosomes and comes from each of two parents, resulting in pairs of homologous chromosomes between sets. However, some organisms are polyploid. Polyploidy is especially common in plants. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A Ploidy, monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Males of bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have Biological life cycle, life cycles with two alternation of generations, alternating multicellular generations. The gametophyte generation is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones. These proteins, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation. Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated ( S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knautia Dipsacifolia
''Knautia'' is a genus of flowering plants in the family Caprifoliaceae. The common names are variants of "widow flower". Others are given the name "scabious", which properly belongs to the related genus (''Scabiosa''). The name ''Knautia'' comes from the 17th-century German botanists, Drs. Christoph and Christian Knaut. by Julia Brittain Selected species * '''' - Meadow widow flower, blue buttons, fie ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knautia Arvensis
''Knautia arvensis'', commonly known as field scabious, is a herbaceous perennial species of flowering plant in the honeysuckle family Caprifoliaceae. Description It is a perennial plant that grows between . It prefers grassy places and dry soils, avoiding heavy soils, and flowers between July and September. The flowers are borne on inflorescences in the form of heads; each head contains many small florets. The head is flatter than in similar species, such as devil's bit scabious (''Succisa pratensis'') and small scabious (''Scabiosa columbaria''). There are 4 stamens in each floret, and 1 notched long stigma. The fruit is nut like, cylindrical and hairy, in size. It has a tap root. The stem has long stiff hairs angled downwards. The leaves form a basal rosette, are paired on the stem, the lowest typically long, spear shaped, whereas the upper are smaller. There are no stipules. Ecology It is occasionally used by the marsh fritillary as a foodplant instead of its usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achene
An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not open at maturity). Achenes contain a single seed that nearly fills the pericarp, but does not adhere to it. In many species, what is called the "seed" is an achene, a fruit containing the seed. The seed-like appearance is owed to the hardening of the fruit wall (pericarp), which encloses the solitary seed so closely as to seem like a seed coat. Examples The fruits of buttercup, buckwheat, caraway, quinoa, amaranth, and cannabis are typical achenes. The achenes of the strawberry are sometimes mistaken for seeds. The strawberry is an accessory fruit with an aggregate of achenes on its outer surface, and what is eaten is accessory tissue. A rose produces an aggregate of achene fruits that are encompassed within an expanded hypanthium ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Entomophily
Entomophily or insect pollination is a form of pollination whereby pollen of plants, especially but not only of flowering plants, is distributed by insects. Flowers pollinated by insects typically advertise themselves with bright colours, sometimes with conspicuous patterns (honey guides) leading to rewards of pollen and nectar; they may also have an attractive scent which in some cases mimics insect pheromones. Insect pollinators such as bees have adaptations for their role, such as lapping or sucking mouthparts to take in nectar, and in some species also pollen baskets on their hind legs. This required the coevolution of insects and flowering plants in the development of pollination behaviour by the insects and pollination mechanisms by the flowers, benefiting both groups. Coevolution History The early spermatophytes (seed plants) were largely dependent on the wind to carry their pollen from one plant to another. Prior to the appearance of flowering plants some gymno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inferior Ovary
In the flowering plants, an ovary is a part of the female reproductive organ of the flower or gynoecium. Specifically, it is the part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals. The pistil may be made up of one carpel or of several fused carpels (e.g. dicarpel or tricarpel), and therefore the ovary can contain part of one carpel or parts of several fused carpels. Above the ovary is the style and the stigma, which is where the pollen lands and germinates to grow down through the style to the ovary, and, for each individual pollen grain, to fertilize one individual ovule. Some wind pollinated flowers have much reduced and modified ovaries. Fruits A fruit is the mature, ripened ovary of a flower following double fertilization in an angiosperm. Because gymnosperms do not have an ovary but reproduce through double fertilization of unprotected ovules, they produce naked seeds that do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scarlet (color)
Scarlet is a bright red color, sometimes with a slightly Orange (colour), orange tinge. In the spectrum of visible light, and on the traditional color wheel, it is one-quarter of the way between red and orange, slightly less orange than vermilion. According to surveys in Europe and the United States, scarlet and other bright shades of red are the colors most associated with courage, force, passion, heat, and joy.Eva Heller (2009), ''Psychologie de la couleur; effets et symboliques'', pp. 42-49 In the Roman Catholic Church, scarlet is the color worn by a Cardinal (Catholicism), cardinal, and is associated with the blood of Christ and the Christian martyr, Christian martyrs, and with sacrifice. Scarlet is also associated with immorality and sin, particularly prostitution or adultery, largely because of a passage referring to "Whore of Babylon, The Great Harlot", "dressed in purple and scarlet", in the Bible (Book of Revelation, Revelation 17:1–6). Uses and varieties File ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zygomorphic
Floral symmetry describes whether, and how, a flower, in particular its perianth, can be divided into two or more identical or mirror-image parts. Uncommonly, flowers may have no axis of symmetry at all, typically because their parts are spirally arranged. Actinomorphic Most flowers are actinomorphic ("star shaped", "radial"), meaning they can be divided into 3 or more identical sectors which are related to each other by rotation about the center of the flower. Typically, each sector might contain one tepal or one petal and one sepal and so on. It may or may not be possible to divide the flower into symmetrical halves by the same number of longitudinal planes passing through the axis: Oleander is an example of a flower without such mirror planes. Actinomorphic flowers are also called radially symmetrical or regular flowers. Other examples of actinomorphic flowers are the lily (''Lilium'', Liliaceae) and the buttercup (''Ranunculus'', Ranunculaceae). Zygomorphic Zygomor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_(255_30)_Tulip;_cross-section.jpg "Click for more on -> Inferior Ovary")
