Ivydene Gardens Glossary: E |
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Earthing up Drawing up soil around the base of a plant to help prevent wind-rock, to blanch the stems, or to encourage stem rooting. Emasculation The removal of the anthers before the pollen is shed to prevent self-pollination and hence self-fertilisation. Epicormic shoots Shoots that develop from latent or adventitious buds on or from the trunk of a tree or shrub. Epigeal Type of seed germination in which the seed is pushed above soil level by elongation of the hypocotyl. Epiphyte A plant that grows on another plant without being parasitic, and obtains moisture and nutrients from the atmosphere without rooting into the soil. Ericaceous 1) Term describing plants of the family Ericaceae, usually lime-hating and requiring soils of pH 6.5 or less; 2) Of compost, with an appropriate pH or acidity for growing ericaceous plants. Espalier A plant trained with the main stem vertical and (usually) three or more tiers of branches horizontally placed on either side in a single plane, often applied to fruit trees. Evergreen Of plants that retain their foliage for more than one growing season; semi-evergreen plants retain only a small proportion of their leaves for more than one season. Explant A tiny portion of a plant prepared and inserted in an aseptic growing medium for micropropagation purposes. Eye 1) A dormant or latent growth bud, such as the eye of a potato or dahlia tuber; 2) The centre of a flower especially if different in colour from the petals. |
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Site design and content copyright ©December 2006. Page structure amended October 2012. Glossary Index added to New Page Template March 2016. Chris Garnons-Williams. DISCLAIMER: Links to external sites are provided as a courtesy to visitors. Ivydene Horticultural Services are not responsible for the content and/or quality of external web sites linked from this site. See
EU Directive No. 456179 In order to meet the conditions for joining the Single European currency, all citizens of the United Kingdom of Great Britain and Northern Ireland must be made aware that the phrase 'Spending a Penny' is not to be used after 31st December 2009. From this date, the correct terminology will be: 'Euronating'. Thank you for your attention. |
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THE 2 EUREKA EFFECT PAGES FOR UNDERSTANDING SOIL AND HOW PLANTS INTERACT WITH IT OUT OF 15,000:-
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when I do not have my own or ones from mail-order nursery photos , then from March 2016, if you want to start from the uppermost design levels through to your choice of cultivated and wildflower plants to change your Plant Selection Process then use the following galleries:-
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There are other pages on Plants which bloom in each month of the year in this website:-
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The following details come from Cactus Art:- "A flower is the the complex sexual reproductive structure of Angiosperms, typically consisting of an axis bearing perianth parts, androecium (male) and gynoecium (female). Bisexual flower show four distinctive parts arranged in rings inside each other which are technically modified leaves: Sepal, petal, stamen & pistil. This flower is referred to as complete (with all four parts) and perfect (with "male" stamens and "female" pistil). The ovary ripens into a fruit and the ovules inside develop into seeds. Incomplete flowers are lacking one or more of the four main parts. Imperfect (unisexual) flowers contain a pistil or stamens, but not both. The colourful parts of a flower and its scent attract pollinators and guide them to the nectary, usually at the base of the flower tube.
Androecium (male Parts or stamens) Gynoecium (female Parts or carpels or pistil) It is made up of the stigma, style, and ovary. Each pistil is constructed of one to many rolled leaflike structures. Stigma This is the part of the pistil which receives the pollen grains and on which they germinate. Style This is the long stalk that the stigma sits on top of. Ovary The part of the plant that contains the ovules. Ovule The part of the ovary that becomes the seeds. Petal The colorful, often bright part of the flower (corolla). Sepal The parts that look like little green leaves that cover the outside of a flower bud (calix). (Undifferentiated "Perianth segment" that are not clearly differentiated into sepals and petals, take the names of tepals.)"
The following details come from Nectary Genomics:- "NECTAR. Many flowering plants attract potential pollinators by offering a reward of floral nectar. The primary solutes found in most nectars are varying ratios of sucrose, glucose and fructose, which can range from as little a 8% (w/w) in some species to as high as 80% in others. This abundance of simple sugars has resulted in the general perception that nectar consists of little more than sugar-water; however, numerous studies indicate that it is actually a complex mixture of components. Additional compounds found in a variety of nectars include other sugars, all 20 standard amino acids, phenolics, alkaloids, flavonoids, terpenes, vitamins, organic acids, oils, free fatty acids, metal ions and proteins. NECTARIES. An organ known as the floral nectary is responsible for producing the complex mixture of compounds found in nectar. Nectaries can occur in different areas of flowers, and often take on diverse forms in different species, even to the point of being used for taxonomic purposes. Nectaries undergo remarkable morphological and metabolic changes during the course of floral development. For example, it is known that pre-secretory nectaries in a number of species accumulate large amounts of starch, which is followed by a rapid degradation of amyloplast granules just prior to anthesis and nectar secretion. These sugars presumably serve as a source of nectar carbohydrate. WHY STUDY NECTAR? Nearly one-third of all worldwide crops are dependent on animals to achieve efficient pollination. In addition, U.S. pollinator-dependent crops have been estimated to have an annual value of up to $15 billion. Many crop species are largely self-incompatible (not self-fertile) and almost entirely on animal pollinators to achieve full fecundity; poor pollinator visitation has been reported to reduce yields of certain species by up to 50%." |
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The following details about DOUBLE FLOWERS comes from Wikipedia:- "Double-flowered" describes varieties of flowers with extra petals, often containing flowers within flowers. The double-flowered trait is often noted alongside the scientific name with the abbreviation fl. pl. (flore pleno, a Latin ablative form meaning "with full flower"). The first abnormality to be documented in flowers, double flowers are popular varieties of many commercial flower types, including roses, camellias and carnations. In some double-flowered varieties all of the reproductive organs are converted to petals — as a result, they are sexually sterile and must be propagated through cuttings. Many double-flowered plants have little wildlife value as access to the nectaries is typically blocked by the mutation.
There is further photographic, diagramatic and text about Double Flowers from an education department - dept.ca.uky.edu - in the University of Kentucky in America.
"Meet the plant hunter obsessed with double-flowering blooms" - an article from The Telegraph. |
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