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Iris Nelsonii
''Iris nelsonii'' is a species in the genus ''Iris'', it is also in the subgenus '' Limniris'' and in the series '' hexagonae''. It is a rhizomatous perennial, from northern America. It has long drooping, grass-like leaves, tall stems, 10 red-purple flowers. Description ''Iris nelsonii'' spreads into large colonies by rhizomes. It has long and narrow grass-like green leaves, which are often droop and becoming glaucous. They are wide and grow up to long. They do not grow as tall as the stem. The stems grow up to , (28–43 inches) with 2–4 branches. It blooms between April and May (a week or 2 later than ''Iris fulva'' and '' Iris giganticaerulea'') in the UK (June) with up to 10 flowers, that are 4–5 inches across. The large flowers come in a range of shades from red-purple, to bright red to brown, and occasionally yellow. The rare yellows are sometimes called 'Abbeville yellows'. The flowers are often drooping or flaring, there are two top (terminal) flower buds, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lowell Fitz Randolph
Lowell Fitz Randolph (7 October 1894 – 28 May 1980) was an American scientist, in the field of genetics, botany and horticulture. He was a Cornell University graduate who became Professor of Botany and was also employed as an associate cytologist for the United States Department of Agriculture. He was also an avid iris collector and wrote a book on the Iris genus. He carried out important research into plant chromosomes of iris, orchid genus and corn plants (such as maize). He was sometimes known as "Fitz" by his many friends and associates. Education and early life Lowell Fitz Randolph, was born on 7 October 1894 in Alfred, New York. Lowell's family had over 200 years of history of being deeply involved in the Seventh Day Baptist Church community, and that Lowell and his sister Vida were the first to break with that community and strong tradition and follow independent, secular paths pursuing their passion for science. Lowell was educated at local schools in Alfred and gradu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Horticultural Society
The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (North Yorkshire), Rosemoor (Devon) and Bridgewater (Greater Manchester); flower shows including the Chelsea Flower Show, Hampton Court Palace Flower Show, Tatton Park Flower Show and Cardiff Flower Show; community gardening schemes; Britain in Bloom and a vast educational programme. It also supports training for professional and amateur gardeners. the president was Keith Weed and the director general was Sue Biggs CBE. History Founders The creation of a British horticultural society was suggested by John Wedgwood (son of Josiah Wedgwood) in 1800. His aims were fairly modest: he wanted to hold regular meetings, allowing the society's members the opportunity to present papers on their horticultural activities and discoveries, to enc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archilochus Colubris
The ruby-throated hummingbird (''Archilochus colubris'') is a species of hummingbird that generally spends the winter in Central America, Mexico, and Florida, and migrates to Canada and other parts of Eastern North America for the summer to breed. It is by far the most common hummingbird seen east of the Mississippi River in North America. Taxonomy The ruby-throated hummingbird was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his '' Systema Naturae'' under the binomial name ''Trochilus colubris''. Linnaeus based his description on the earlier account by Mark Catesby in his ''The Natural History of Carolina, Florida and the Bahama Islands'' that had been published in 1729 and that by George Edwards in his ''A Natural History of Uncommon Birds'' that had been published in 1743. The type locality is South Carolina. The specific epithet ''colubris'' is from the Spanish ''colibrÃ'' meaning "hummingbird". The ruby-throated hummingbi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USDA
The United States Department of Agriculture (USDA) is the federal executive department responsible for developing and executing federal laws related to farming, forestry, rural economic development, and food. It aims to meet the needs of commercial farming and livestock food production, promotes agricultural trade and production, works to assure food safety, protects natural resources, fosters rural communities and works to end hunger in the United States and internationally. It is headed by the Secretary of Agriculture, who reports directly to the President of the United States and is a member of the president's Cabinet. The current secretary is Tom Vilsack, who has served since February 24, 2021. Approximately 80% of the USDA's $141 billion budget goes to the Food and Nutrition Service (FNS) program. The largest component of the FNS budget is the Supplemental Nutrition Assistance Program (formerly known as the Food Stamp program), which is the cornerstone of USDA's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hardiness (plants)
Hardiness of plants describes their ability to survive adverse growing conditions. It is usually limited to discussions of climatic adversity. Thus a plant's ability to tolerate cold, heat, drought, flooding, or wind are typically considered measurements of hardiness. Hardiness of plants is defined by their native extent's geographic location: longitude, latitude and elevation. These attributes are often simplified to a hardiness zone. In temperate latitudes, the term most often describes resistance to cold, or "cold-hardiness", and is generally measured by the lowest temperature a plant can withstand. Hardiness of a plant is usually divided into two categories: tender, and hardy. (Some sources also use the erroneous terms "Half-hardy" or "Fully hardy".) Tender plants are those killed by freezing temperatures, while hardy plants survive freezing—at least down to certain temperatures, depending on the plant. "Half-hardy" is a term used sometimes in horticulture to describe bed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Brevicaulis
''Iris brevicaulis'' is a species in the genus ''Iris (plant), Iris'', it is also in the subgenus ''Iris subg. Limniris, Limniris'' and in the series ''Louisiana iris, Hexagonae''. It is a rhizomatous perennial plant, perennial, from North America. It has bright green, glossy long leaves, a long zig-zagged stem and 3–6 flowers per stem, which are come in blue shades from violet-blue, to lavender, to purple-blue, to bright blue to blue, and pale blue. Description ''Iris brevicaulis'' is the smallest in all the ''Hexagonae series'' of Louisiana irises. Its leaves and stalks are much shorter than the other species. It is similar in form to ''Iris virginica'',Michael A. Homoy The flowers are normally never seen above the foliage,Robert H. Mohlenbroc due to the short zig-zagging flower stems and occasionally, due to the habit of the stems to lie along the floor, or it is often decumbent (meaning the branches growing horizontally but turned up at the ends).Garrett E. Crow and C. Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Random Amplification Of Polymorphic DNA
Random amplification of polymorphic DNA (RAPD), pronounced "rapid", is a type of polymerase chain reaction (PCR), but the segments of DNA that are amplified are random. The scientist performing RAPD creates several arbitrary, short primers (10- 12 nucleotides), then proceeds with the PCR using a large template of genomic DNA, hoping that fragments will amplify. By resolving the resulting patterns, a semi-unique profile can be gleaned from an RAPD reaction. No knowledge of the DNA sequence of the targeted genome is required, as the primers will bind somewhere in the sequence, but it is not certain exactly where. This makes the method popular for comparing the DNA of biological systems that have not had the attention of the scientific community, or in a system in which relatively few DNA sequences are compared (it is not suitable for forming a cDNA databank). Because it relies on a large, intact DNA template sequence, it has some limitations in the use of degraded DNA samples. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast DNA
Chloroplast DNA (cpDNA) is the DNA located in chloroplasts, which are photosynthetic organelles located within the cells of some eukaryotic organisms. Chloroplasts, like other types of plastid, contain a genome separate from that in the cell nucleus. The existence of chloroplast DNA was identified biochemically in 1959, and confirmed by electron microscopy in 1962. The discoveries that the chloroplast contains ribosomes and performs protein synthesis revealed that the chloroplast is genetically semi-autonomous. The first complete chloroplast genome sequences were published in 1986, ''Nicotiana tabacum'' (tobacco) by Sugiura and colleagues and ''Marchantia polymorpha'' (liverwort) by Ozeki et al. Since then, a great number of chloroplast DNAs from various species have been sequenced. Molecular structure Chloroplast DNAs are circular, and are typically 120,000–170,000 base pairs long. They can have a contour length of around 30–60 micrometers, and have a mass of about 80â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isozyme
In biochemistry, isozymes (also known as isoenzymes or more generally as multiple forms of enzymes) are enzymes that differ in amino acid sequence but catalyze the same chemical reaction. Isozymes usually have different kinetic parameters (e.g. different ''K''M values), or are regulated differently. They permit the fine-tuning of metabolism to meet the particular needs of a given tissue or developmental stage. In many cases, isozymes are encoded by homologous genes that have diverged over time. Strictly speaking, enzymes with different amino acid sequences that catalyse the same reaction are isozymes if encoded by different genes, or allozymes if encoded by different alleles of the same gene; the two terms are often used interchangeably. Introduction Isozymes were first described by R. L. Hunter and Clement Markert (1957) who defined them as ''different variants of the same enzyme having identical functions and present in the same individual''. This definition encompasses (1) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Hexagona
''Iris hexagona'', commonly known as the Dixie iris, is a species in the genus ''Iris (plant), Iris'', it is also in the subgenus ''Iris subg. Limniris, Limniris'' and in the series ''Louisiana iris, hexagonae''. It is a rhizomatous perennial plant, perennial with long bright green leaves, long thin stem and has small groups of flowers in shades of blue, from violet, to bluish purple, to lavender. It flowers in springtime and is native to the southeastern and south-central US states. Description ''Iris hexagona'' has thick (around 2–2. cm in diameter), greenish, branching rhizomes, that can spread to form large colonies of plants. The rhizomes are shallow rooted and can spread up to per plant. Arising from the rhizomes are the basal leaves, which are yellow-green to bright green and sword-shaped.Stephen Elliott (1821) They can grow up to between ,Edwin B. Smith (or 2 feet), and between wide. They overlap at the base, similar to a fan, but some leaves grow on the flowering s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris Fulva
''Iris fulva'', also known as copper iris, is a species in the genus ''Iris'', it is also in the subgenus '' Limniris'' and in the series '' Hexagonae''. It is a rhizomatous perennial, endemic to the southern and central United States. It has copper-red to deep red flowers and bright green leaves. Description ''Iris fulva'' has slender greenish-brown rhizome (or occasionally red,) that has the (ring-like) scars of old leaves (from previous seasons). They are approximately 1.5–2 cm in diameter, shallow rooted with fibrous roots underneath and can form many branches. Which eventually spread out to create large clumps around 1–2 feet wide. It grows new leaves early in the autumn, which can pass through the winter into the spring. This means that the plant is generally only leafless around August time. The leaves are bright green, blade-like (meaning long and narrow), lightly ribbed (parallel to the stem) and rise from the base of the plant but then arch away from the stem. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmetto Island State Park
Palmetto Island State Park is a recent addition to the Louisiana State Park system. The new state park is located south of Abbeville, Louisiana in Vermilion Parish. The state of Louisiana acquired the property for the park in 1981 but did not begin construction on it with the intent of public use until 2002. State budget constraints and other concerns delayed the park's opening until October 28, 2010. The park, in size, is noted for its abundance of palmettos,(mostly Dwarf Palmetto ''Sabal minor'', commonly known as the dwarf palmetto, is a small species of palm. It is native to the deep southeastern and south-central United States and northeastern Mexico. It is naturally found in a diversity of habitats, including maritime ...) which form a dense understory in the coastal bottomland hardwood forest that predominates here. Palmetto Island State Park has a visitor's center which houses a multi-purpose room that can rented for meetings, weddings and other social events. A water p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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