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Eucomis Sonnetteana
''Eucomis'' is a genus of flowering plants in the family Asparagaceae, subfamily Scilloideae, native to southern Africa. Most species of this genus are commonly referred to as pineapple flowers or pineapple lilies. They are bulbous perennials with basal rosettes of leaves and stout stems covered in star-shaped flowers with a tuft of green bracts at the top, superficially resembling a pineapple – hence the common names. Taxonomy The genus ''Eucomis'' was first published by Charles L'Héritier in 1789. The name ''Eucomis'' is of Greek origin, ''eu-'' meaning "pleasing" and ''kome'' "hair of the head", thus referring to the tuft of leaf-like bracts that crown the inflorescence of the species in this genus. The name was first used by Daniel Solander, who decided that Linnaeus's ''Fritillaria regia'' should be placed in a separate genus. However, Solander died before publishing the name, and was not mentioned by L'Héritier in his 1789 publication. Initially, three species were p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Autumnalis
''Eucomis autumnalis'', the autumn pineapple flower, or autumn pineapple lily, is a species of flowering plant in the family Asparagaceae, subfamily Scilloideae, native to Malawi, Zimbabwe and southern Africa. It is a mid to late summer flowering deciduous bulbous perennial. The flower stem reaches about , rising from a basal rosette of wavy-edged leaves. The green, yellow or white flowers are arranged in a spike (raceme), topped by a "head" of green leaflike bracts. It is grown as an ornamental garden plant and can also be used as a cut flower. Description ''Eucomis autumnalis'' is a perennial growing from a large bulb with a diameter of up to . Like other ''Eucomis'' species, it has a basal rosette of strap-shaped leaves. These are up to long and wide, with a wavy margin. The sweetly scented inflorescence, produced in late summer, is a dense raceme, reaching an overall height of . The individual flowers have green, yellow-green or white tepals and are borne on short ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lachenalia
''Lachenalia'' is a genus of bulbous perennial plants in the family Asparagaceae, subfamily Scilloideae, which are usually found in Namibia and South Africa. Most of them have a dormancy period, but new roots will always grow every year. ''Lachenalia'' is named after the Swiss botanist Werner de Lachenal (1736-1800). Species are sometimes known as Cape cowslip, though they are not even somewhat related to the true cowslip ''Primula veris''. Species , the ''Plants of the World Online'' accepted 136 species:Search for "Lachenalia", *'' Lachenalia alba'' W.F.Barker ex G.D.Duncan *'' Lachenalia algoensis'' Schönland *''Lachenalia aloides'' (L.f.) Engl. *'' Lachenalia ameliae'' W.F.Barker *'' Lachenalia angelica'' W.F.Barker *'' Lachenalia anguinea'' Sweet *'' Lachenalia arbuthnotiae'' W.F.Barker *'' Lachenalia attenuata'' W.F.Barker ex G.D.Duncan *'' Lachenalia aurioliae'' G.D.Duncan *'' Lachenalia bachmannii'' Baker *'' Lachenalia barkeriana'' U.Müll.-Doblies *'' Lachenalia bolus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Pallidiflora
''Eucomis pallidiflora'', the giant pineapple lily, is a bulbous species of flowering plant in the family Asparagaceae, subfamily Scilloideae, native plant, native to southern Africa (South Africa, Lesotho and Eswatini). The white to green flowers appear in summer and are arranged in a spike (raceme), topped by a "head" of green leaflike bracts. Some forms reach almost when in flower. The species is cultivated as an ornamental plant, although it is not hardy in areas where severe frosts occur. Description ''Eucomis pallidiflora'' is a perennial plant, perennial growing from a large bulb In botany, a bulb is structurally a short stem with fleshy leaves or leaf basesBell, A.D. 1997. ''Plant form: an illustrated guide to flowering plant morphology''. Oxford University Press, Oxford, U.K. that function as food storage organs du ... with a diameter of up to . It has a basal rosette of strap-shaped leaves, about long and wide, with minutely serrated margins. The inflorescence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Montana
''Eucomis montana'' is a plant species in the family Asparagaceae, subfamily Scilloideae, found in South Africa (KwaZulu-Natal and the Northern Provinces) and Eswatini (Swaziland). When in flower in summer, the plant reaches a height of up to , with a dense spike (raceme) of greenish flowers, topped by a "head" of green bracts. Description ''Eucomis montana'' is a perennial growing from a large ovoid bulb with a diameter of up to . Like other ''Eucomis'' species, it has a basal rosette of strap-shaped leaves. These are about long and wide, with smooth margins and purple spots or speckles underneath. The inflorescence, produced in late summer, is a dense raceme. The plant reaches an overall height of around . The individual flowers have greenish tepals and stamens with purple filaments, and are borne on short stalks ( pedicels) long. The inflorescence is topped by a head (coma) of green bracts, up to long. The homoisoflavanone 5,6-dimethoxy-7-hydroxy-3-(4′-hydroxybenzyl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Humilis
''Eucomis humilis'' is a species of flowering plant in the family Asparagaceae, subfamily Scilloideae, native to KwaZulu-Natal and Lesotho. It was first described by Baker in 1895. The greenish to purplish flowers appear in summer and are arranged in a spike (raceme), topped by a "head" of green leaflike bracts. Cultivated as an ornamental plant, it can be grown successfully outside where frosts are not too severe. Description ''Eucomis humilis'' is a short summer-growing bulbous plant. Its bulb is ovoid, across. Six to eight leaves emerge from the bulb, each about long and across. The bases of the leaves are sometimes spotted underneath. The margins are variously described as smooth without undulations or wavy-edged. The flowers are arranged in a short, rather slender raceme on a stem ( peduncule) tall. The raceme is topped by a head or "coma" of short bracts. The somewhat unpleasantly scented flowers have six greenish or purplish tepals, and purple stamen filaments. The ova ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Grimshawii
''Eucomis grimshawii'' is a species of flowering plant in the family Asparagaceae, subfamily Scilloideae, native to the Cape Provinces. It was first described by Graham Duncan and Ben Zonneveld in 2010. Description ''Eucomis grimshawii'' is a short summer-growing bulbous plant, up to tall. The bulb is ovoid, about across, with a pale brown outer tunic. The bulb produces four or five leaves, long and wide, with flat or slightly undulate margins. The inflorescence is a dense raceme long, with a variable number of flowers. The flowering stem ( scape) is shaded dark maroon or magenta on the lower half, with similarly coloured marks on the upper half. Individual flowers are slightly sweetly scented, with greenish white tepals up to long. The upper flowers have up to long pedicels, the lower ones are sessile. The inflorescence is topped by a head or "coma" of 9–16 bracts long. The ovary has three locules. The seeds are dull blackish brown. Taxonomy ''Eucomis grimshawii'' wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Comosa
''Eucomis comosa'', the pineapple flower, pineapple lily or wine eucomis, is a species of flowering plant in the asparagus family Asparagaceae (subfamily Scilloideae). A deciduous bulbous perennial used as an ornamental plant, it is endemic to South Africa. The white to purple flowers appear in summer and are arranged in a spike (raceme), topped by a "head" of green leaflike bracts. Description ''Eucomis comosa'' is a perennial plant, growing from a large bulb, which is often purple in colour. The leaves form a basal rosette, and are long by wide, with a smooth, slightly undulating margin. The leaves usually have purple spots and may have an overall purple tinge; var. ''striata'' has purple stripes. The inflorescence, a raceme, appears in summer (late July or early August in the UK) and is borne on a stem ( peduncule) tall. Individual flowers have stalks (pedicels) long. The tepals are whitish to purple, the ovary always purple. Most plants have a pleasant coconut-like scent. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Bicolor
''Eucomis bicolor'', the variegated pineapple lily or just pineapple lily, is a bulbous species of flowering plant in the family Asparagaceae, subfamily Scilloideae, native to Southern Africa (the Cape Provinces, Lesotho, KwaZulu-Natal, the Free State, and the Northern Provinces). The pale green, purple-margined flowers are arranged in a spike (raceme), topped by a "head" of green leaflike bracts. It is cultivated as an ornamental bulbous plant, although its flowers have an unpleasant smell, attractive to the main pollinators, flies. Description ''Eucomis bicolor'' is a perennial growing from a large bulb. It reaches in height, with a basal rosette of wavy leaves long. In late summer (August in the UK), it produces a stout stem ( peduncule), often with purple markings. The inflorescence is a raceme of pale green, purple margined flowers with tepals up to long, borne on pedicels long. The inflorescence is terminated by a head (coma) of pale green leafy bracts, sometimes tin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucomis Amaryllidifolia
''Eucomis amaryllidifolia'' is a species of flowering plant in the family Asparagaceae, subfamily Scilloideae, native to the Cape Provinces. It is a short, summer-flowering bulbous plant, with a dense spike (raceme) of yellowish-green flowers topped by a "head" of leafy bracts. In Afrikaans it is called ('rock lily'). Description ''Eucomis amaryllidifolia'' is a short summer-growing bulbous plant, tall. Its bulb is more or less spherical, across, with a dark brown outer tunic. Five or six leaves emerge from the bulb, long and across. The margins of the leaves are wavy. The inflorescence is a densely packed raceme with 30–50 individual flowers. The raceme is topped by a head or "coma" formed from 13 to 20 bracts about long. The somewhat sweetly scented flowers have six yellowish green tepals, long by wide. The ovary is greenish yellow. The seeds are glossy and black. It flowers in summer and early autumn (January to March in its native South Africa). Taxonomy ''Eucomis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetraploid
Polyploidy is a condition in which the cells of an organism have more than one pair of (homologous) chromosomes. Most species whose cells have 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 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 life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by me ... [...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 ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diploid
Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as. Somatic cells, tissues, and individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is often used to describe cells with three or more chromosome sets. Virtually all sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different organisms, between different tissues within the same organism, and at different stages in an organism's life cycle. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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