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Delphinium Exaltatum
''Delphinium exaltatum'', known by the common name tall larkspur, is a species of flowering plant in the genus ''Delphinium'', part of the buttercup family. Other ''Delphinium'' species are also commonly known as tall larkspur, such as ''Delphinium barbeyi''. ''D. exaltatum'' is native to the central and eastern United States, where it can be found in Kentucky, Maine, Ohio, Pennsylvania, Maryland, West Virginia, Virginia, North Carolina, Alabama, Tennessee, and Missouri. ''D. exaltatum'' is a perennial herb producing a stem up to tall from a long, thick taproot. The base of the stem may have a reddish tinge and it is free of leaves by the time the plant blooms. The leaves are somewhat circular or pentagonal in outline and are divided into a few wedge-shaped lobes. The leaf blade is borne on a petiole up to 15 centimeters long. Flowering occurs between July and September. The inflorescence is a raceme of up to 30 flowers. The sepals are any shade of dull blue to purple or lavende ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Aiton
William Aiton (17312 February 1793) was a Scotland, Scottish botanist. Aiton was born near Hamilton, Scotland, Hamilton. Having been regularly trained to the profession of a gardener, he travelled to London in 1754, and became assistant to Philip Miller, then superintendent of the Chelsea Physic Garden. In 1759 he was appointed director of the newly established Royal Botanic Gardens, Kew, botanical garden at Kew, where he remained until his death. He effected many improvements at the gardens, and in 1789 he published ''Hortus Kewensis'', a catalogue of the plants cultivated there. He is buried at nearby St. Anne's Church, Kew. A second and enlarged edition of the ''Hortus'' was brought out in 1810–1813 by his eldest son, William Townsend Aiton. Aiton is commemorated in the Specific epithet (botany), specific epithet ''aitonis''. In 1789, he classified the Sampaguita plant to the ''Jasmine, Jasminium'' genus and also named it as ''Arabian Jasmine'' because it was believed th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed on the axis of a plant. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes. One can also define an inflorescence as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern. The stem holding the whole inflorescence is called a peduncle. The major axis (incorrectly referred to as the main stem) above the peduncle bearing the flowers or secondary branches is called the rachis. The stalk of each flower in the inflorescence is called a pedicel. A flower that is not part of an inflorescence is called a solitary flower and its stalk is al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirca Palustris
''Dirca palustris'', or eastern leatherwood, is a shrub that grows to a maximum height of about three meters. It is native to the eastern half of North America but abundant only locally. It is most likely to be encountered in the northern part of its range, and is a dominant shrub in some hardwood forests of the upper Great Lakes Region. Rich woods, swampy in some cases, provide its main habitat, and it is occasionally cultivated. The species name, "palustris", means "of the swamps," although it also occurs in well-drained areas provided that the soils are moisture-retentive. It is often hard to recognize because the flowers, which come out just before leafing, last a very short time and ''D. palustris'' may be mixed in with the much more frequent Spicebush, which also has small yellow flowers that appear before the leaves and do so at just about the same time in the early spring. Its closest relative, the Dirca occidentalis, western leatherwood, lives across the continent in the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asclepias Quadrifolia
''Asclepias quadrifolia'', commonly called four-leaved milkweed or fourleaf milkweed, is a species of milkweed in the Apocynaceae (dogbane) family. It is sometimes referred to as whorled milkweed, but it should not be confused with ''Asclepias verticillata''. ''A. quadrifolia'' occurs in the eastern United States and Canada. Description Fourleaf milkweed is a perennial herb with an upright stem growing from a fleshy rhizome. The stem has a milky sap. The plant is small and slender compared to other milkweeds at only tall. Leaves are usually elliptic to ovate and long and wide. Leaves are opposite and appear in 3 to 4 sets on the stem, with one of the higher sets having 4 leaves arranged in a whorl (giving the plant its common name) and the other sets consisting of only 2 leaves. Pale pink to white flowers are borne in 1 to 3 rounded, usually pendulous clusters, or umbels from the leaf axils and terminus. The fruit is a follicle or pod that is very slender, long and thick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waldsteinia Fragarioides
''Waldsteinia fragarioides'' ( syn. ''Dalibarda fragarioides'' Michx. and ''Geum fragarioides, '' also called Appalachian barren strawberry, or just barren strawberry, is a low, spreading plant with showy yellow flowers that appear in early spring. This plant is often used as an underplanting in perennial gardens. In some ways the appearance is similar to other low plants of the rose family such as '' Fragaria'' (strawberries) or ''Potentilla indica'' (Indian strawberry), but it lacks runners and has more rounded leaves. It is native to eastern North America, from Minnesota, Ontario, Quebec, and Maine south to Indiana and Pennsylvania (and as far south as North Carolina in the mountains). It is evergreen. Conservation status in the United States It is listed endangered in Connecticut, Illinois, and Maine, as threatened in New Hampshire, as a special concern in Massachusetts, and as rare in Indiana. Native American ethnobotany The Iroquois take a compound decoction of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhus Typhina
''Rhus typhina'', the staghorn sumac, is a species of flowering plant in the family Anacardiaceae, native to eastern North America. It is primarily found in southeastern Canada, the northeastern and midwestern United States, and the Appalachian Mountains, but it is widely cultivated as an ornamental throughout the temperate world. Etymology The specific epithet ''typhina'' is explained in Carl Linnaeus and Ericus Torner's description of the plant with the phrase "Ramis hirtis uti typhi cervini", meaning "the branches are rough like antlers in velvet". In both French and German, the common name of the species (''sumac vinaigrier; Essigbaum'') means "vinegar tree". Description ''Rhus typhina'' is a dioecious, deciduous shrub or small tree growing up to tall by broad. It has alternate, pinnately compound leaves long, each with 9–31 serrate leaflets long. Leaf petioles and stems are densely covered in rust-colored hairs. The velvety texture and the forking pattern of the branc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupatorium Sessilifolium
''Eupatorium sessilifolium'', commonly called upland boneset or sessile-leaved boneset, is a North American plant species in the family Asteraceae. It is native to the eastern and central United States, found from Maine south to North Carolina and Alabama, and west as far as Arkansas, Kansas, and Minnesota. Description ''Eupatorium sessilifolium'' is a perennial herb with stems that are sometimes more than 100 centimeters (40 inches) tall. They are produced from a woody underground caudice or short rhizome. The top of the stems, where the branching begins to the flower heads, have short hairs, while the lower part of the stems have no hairs. The leaves are arranged in opposite pairs and are toothed. The leaf bases are rounded and the leaves are sessile (lacking stalks), but they do not clasp around the stem. The foliage is dotted with glands. ''Eupatorium sessilifolium'' blooms in August and September (July in the southern part of its range), and the small inflorescences are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diabase
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). ''Diabase'' is the preferred name in North America, while ''dolerite'' is the preferred name in the rest of the English-speaking world, where sometimes the name ''diabase'' refers to altered dolerites and basalts. Some geologists prefer to avoid confusion by using the name ''microgabbro''. The name ''diabase'' comes from the French ', and ultimately from the Greek - meaning "act of crossing over, transition". Petrography Diabase normally has a fine but visible texture of euhedral lath-shaped plagioclase crystals (62%) set in a finer matrix of clinopyroxene, typically augite (20–29%), with minor olivine (3% up to 12% in olivine diabase), magnetite (2%), an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibolite
Amphibolite () is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense, with a weakly foliated or schistose (flaky) structure. The small flakes of black and white in the rock often give it a salt-and-pepper appearance. Amphibolite frequently forms by metamorphism of mafic igneous rocks, such as basalt. However, because metamorphism creates minerals entirely based upon the chemistry of the protolith, certain 'dirty marls' and volcanic sediments may also metamorphose to an amphibolite assemblage. Deposits containing dolomite and siderite also readily yield amphibolite (tremolite-schist, grunerite-schist, and others) especially where there has been a certain amount of contact metamorphism by adjacent granitic masses. Metamorphosed basalt (metabasalt) creates ''ortho-amphibolite'' and other chemically appropriate lithologies create ''para-amphibolite''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chert
Chert () is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a precipitation (chemistry), chemical precipitate or a diagenesis, diagenetic replacement, as in petrified wood. Chert is typically composed of the petrified remains of siliceous ooze, the biogenic sediment that covers large areas of the deep ocean floor, and which contains the silicon skeletal remains of diatoms, Dictyochales, silicoflagellates, and radiolarians. Precambrian cherts are notable for the presence of fossil cyanobacteria. In addition to Micropaleontology, microfossils, chert occasionally contains macrofossils. However, some chert is devoid of any fossils. Chert varies greatly in color (from white to black), but most often manifests as gray, brown, grayish brown and light green to rusty redW.L. Roberts, T.J. Campbell, G.R. Rapp Jr. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prairie
Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the dominant vegetation type. Temperate grassland regions include the Pampas of Argentina, Brazil and Uruguay, and the steppe of Ukraine, Russia and Kazakhstan. Lands typically referred to as "prairie" tend to be in North America. The term encompasses the area referred to as the Geography of North America, Interior Lowlands of Canada, the United States, and Mexico, which includes all of the Great Plains as well as the wetter, hillier land to the east. In the U.S., the area is constituted by most or all of the states of North Dakota, South Dakota, Nebraska, Kansas, and Oklahoma, and sizable parts of the states of Montana, Wyoming, Colorado, New Mexico, Texas, Missouri, Iowa, Illinois, Indiana, Wisconsin, and western and southern Minnesota. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
