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Iris Acutiloba
''Iris acutiloba'' is a species in the genus ''Iris'', it is also in the subgenus of ''Iris'' and section ''Oncocyclus''. It is a rhizomatous perennial, from the mountains of the Caucasus and found in Turkey, Armenia, Azerbaijan, Turkmenistan, Dagestan in the North Caucasus, and Iran. It is a dwarf species, with narrow, falcate or curved leaves, it has one flower in spring or early summer, that comes in shades from cream, creamy white, whitish, pale brown, light grey, to pale violet. It is heavily veined or streaked and pointed, with 2 dark spots and brown, purple, dark purple, or black short beard. It is cultivated as an ornamental plant in temperate regions. There are two subspecies, ''Iris acutiloba'' subsp. ''lineolata'' and ''Iris acutiloba'' subsp. ''longitepala''. Description It has a small, thick and compressed rhizomes, which have many branches,James Cullen, Sabina G. Knees, H. Suzanne Cubey (Editors) and gives the plant a creeping habit,Richard Lynch across the surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Anton Von Meyer
Carl Anton von Meyer (in Russian: Карл Анто́нович фон Ме́йер, ''Karl Antonovich von Meyer'') (1 April 1795 – 24 February 1855) was a German, Russified botanist and explorer. Meyer was born in Vitebsk. He received his education at the University of Dorpat (1813-14) as a student of Karl Friedrich von Ledebour, with whom he later embarked on a scientific journey to the Crimea (1818). In 1826, with Ledebour and Alexander G. von Bunge, he took part in an expedition to the Altay Mountains and the Kirghiz Steppe (Kazakhstan). Plants collected on the trip formed the basis of "Flora Altaica" (four volumes issued between 1829 and 1833).JSTOR Global Plants JSTOR Global Plants] (biography) In 1835 he began work as a botanist for the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate and ebracteolate, without bracts. Variants Some bracts are brightly-coloured and serve the function of attracting pollinators, either together with the perianth or instead of it. Examples of this type of bract include those of ''Euphorbia pulcherrima'' (poinsettia) and ''Bougainvillea'': both of these have large colourful bracts surrounding much smaller, less colourful flowers. In grasses, each floret (flower) is enclosed in a pair of papery bracts, called the lemma (lower bract) and p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosomes
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 called sis ... [...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. Half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthocyanin
Anthocyanins (), also called anthocyans, are water-soluble vacuolar pigments that, depending on their pH, may appear red, purple, blue, or black. In 1835, the German pharmacist Ludwig Clamor Marquart gave the name Anthokyan to a chemical compound that gives flowers a blue color for the first time in his treatise "''Die Farben der Blüthen''". Food plants rich in anthocyanins include the blueberry, raspberry, black rice, and black soybean, among many others that are red, blue, purple, or black. Some of the colors of autumn leaves are derived from anthocyanins. Anthocyanins belong to a parent class of molecules called flavonoids synthesized via the phenylpropanoid pathway. They occur in all tissues of higher plants, including leaves, stems, roots, flowers, and fruits. Anthocyanins are derived from anthocyanidins by adding sugars. They are odorless and moderately astringent. Although approved as food and beverage colorant in the European Union, anthocyanins are not approved ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Meda
Iris meda is a species in the genus ''Iris'', it is also in the subgenus of Iris and in the Oncocyclus section. It is from the desert mountains and hills of Media (which is now Iran) and has long grey-green leaves with cream, pale yellow or yellow flowers, which have purple or dark brown patches and yellow beards. Description ''Iris meda'' has small, about long,British Iris Society (1997) thin, stoloniferous-like rhizomes, and long secondary roots underneath the rhizome. It has upright, narrow, blade-shaped foliage, which are grey-green and long, and wide. The plant in total can reach between tall, with straight stems reaching high. It blooms between April and May, and has small flowers, that have a range of colour variations, that come in shades from cream or whitish ground color, lemon yellow to creamy straw-yellow ground colours. It is similar in form to '' Iris sari'', which does not grow in Iran and does not have folded falls. Like other irises, it has 2 pairs of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Persica
''Iris persica'', the Persian iris, is a native plant of Iran. It is particularly known for its beauty and fragrance. One of the first Juno irises to be described, this species has been in cultivation for centuries and was listed by Philip Miller in his book of 1732. It was originally grown as an indoor plant. Description This bulbous perennial is short, about 4 inches (10 cm) high. The leaves are 0.2 to 0.6 inches (5 to 15 mm) wide with a pale edge and a grey underside. The flowers are 2 inches (5 cm) across, varying in colour from brownish to greenish or greyish. Distribution It is an alpine plant growing in the hills of Iraq, Turkey and Syria, at altitudes between 300 and 5400 feet (100 to 1650 metres). Cultivation ''Iris persica'' needs warmth and shelter to blossom but can be grown in the open air. It flowers in February and March and may flower for up to six weeks in a row. The beauty of this plant attracted the attention of gardening writers including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Pseudocaucasica
''Iris pseudocaucasica'' is a species in the genus ''Iris'', it is also in the subgenus ''Scorpiris''. It is a bulbous perennial from central Asia, within the Caucasus (in Armenia, Azerbaijan and Georgia) and in Iran, Iraq and Turkey. Description It is not to be confused with '' Iris caucasica'', although in the same sub-genus of iris, they are different plants. It differs from ''Iris caucasica'' by having yellowish green or blue flowers. ''Iris pseudocaucasica'' has a bulb of 1-1.5 cm diameter. It generally has 3–4 leaves, when fully grown these reach a height of between 4–18 cm long and between 1–2.8 cm wide at the base of the plant, but averagely, they are 1-1.5 cm wide. They are generally lanceolate shaped, channelled, glossy green above with a greyish-green below, with a white cartilaginous margin. The large leaves normally obscure the flower stem, which can reach a maximum height of tall. It has generally 1–4 flowers per stem. It blooms in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Reticulata
''Iris reticulata'', the netted iris or golden netted iris, is a species of flowering plant in the family (biology), family Iridaceae. It is native plant, native from eastern Turkey to Iran, but cultivated widely in temperateness, temperate regions. The reticulata group of irises is characterised by a fibrous net surrounding the bulb. They are small plants to , with tubular, sharply-pointed, ribbed leaves, and flowers of yellow, blue or purple with an orange blaze on the falls, appearing in early spring. They are Hardiness (plants), hardy, but prefer a well-drained sunny position in soil which dries out in summer; they are therefore suitable for a Alpinum (garden), rock or gravel garden. The following cultivars have received the Royal Horticultural Society's Award of Garden Merit: *'George' (purple) *'Katharine Hodgkin' (pale blue) *'Pixie' (deep blue) There is a known Variety (botany), variety called Iris reticulata var. bakeriana, ''Iris reticulata'' var. ''bakeriana'' (also kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthers
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in '' Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea''). The androecium in var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Root Hair
Root hair, or absorbent hairs, are outgrowths of epidermal cells, specialized cells at the tip of a plant root. They are lateral extensions of a single cell and are only rarely branched. They are found in the region of maturation, of the root. Root hair cells improve plant water absorption by increasing root surface area to volume ratio which allows the root hair cell to take in more water. The large vacuole inside root hair cells makes this intake much more efficient. Root hairs are also important for nutrient uptake as they are main interface between plants and mycorrhizal fungi. Function The function all root hairs is to collect water and mineral nutrients in the soil to be sent throughout the plant. In roots, most water absorption happens through the root hairs. The length of root hairs allows them to penetrate between soil particles and prevents harmful bacterial organisms from entering the plant through the xylem vessels. Increasing the surface area of these hairs makes plants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stigma (botany)
The stigma () is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. Description The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of , the cells of which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it is on the stigma that the pollen grain germinates. Often sticky, the stigma is adapted in various ways to catch and trap pollen with various hairs, flaps, or sculpturings. The pollen may be captured from the air (wind-borne pollen, anemophily), from visiting insects or other animals ( biotic pollination), or in rare cases from surrounding water (hydrophily). Stigma can vary from long and sle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
