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Ephemeral Plant
An ephemeral plant is a plant with a very short life cycle or very short period of active growth, often one that grows only during brief periods when conditions are favorable. Several types of ephemeral plants exist. The first, spring ephemeral, refers to plants that emerge quickly in the spring and die back to their underground parts after a short growth and reproduction phase. Desert ephemerals are plants which are adapted to take advantage of the short wet periods in arid climates. Mud-flat ephemerals take advantage of short periods of low water. In areas subjected to recurring human disturbance, such as plowing, weedy ephemerals are very short-lived plants whose entire life cycle takes less than a growing season. In each case, the species has a life cycle timed to exploit a short period when resources are freely available. An evergreen plant could be considered the opposite of an ephemeral plant. Spring ephemerals Spring ephemerals are woodland wildflowers which develop aeri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sunlight
Sunlight is the portion of the electromagnetic radiation which is emitted by the Sun (i.e. solar radiation) and received by the Earth, in particular the visible spectrum, visible light perceptible to the human eye as well as invisible infrared (typically perceived by humans as warmth) and ultraviolet (which can have physiological effects such as sunburn) lights. However, according to the American Meteorological Society, there are "conflicting conventions as to whether all three [...] are referred to as light, or whether that term should only be applied to the visible portion of the spectrum." Upon reaching the Earth, sunlight is light scattering by particles, scattered and attenuation, filtered through the atmosphere of Earth, Earth's atmosphere as daylight when the Sun is above the horizon. When direct solar radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and radiant heat (atmospheric). When cloud cover, blocked by clouds or dif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Annual Plant
An annual plant is a plant that completes its life cycle, from germination to the production of seeds, within one growing season, and then dies. Globally, 6% of all plant species and 15% of herbaceous plants (excluding trees and shrubs) are annuals. The annual life cycle has independently emerged in over 120 different plant families throughout the entire angiosperm phylogeny. The evolutionary and ecological drivers of the annual life cycle Traditionally, there has been a prevailing assumption that annuals have evolved from perennial ancestors. However, recent research challenges this notion, revealing instances where perennials have evolved from annual ancestors. Intriguingly, models propose that transition rates from an annual to a perennial life cycle are twice as fast as the reverse transition. The life-history theory posits that annual plants are favored when adult mortality is higher than seedling (or seed) mortality, i.e., annuals will dominate environments with dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Desert
A desert is a landscape where little precipitation occurs and, consequently, living conditions create unique biomes and ecosystems. The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or Semi-arid climate, semi-arid. This includes much of the Polar regions of Earth, polar regions, where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location. Deserts are formed by weathering processes as large variations in temperature between day and night strain the Rock (geology), rocks, which consequently break in pieces. Although rain seldom occurs in deserts, there are occasional downpours that can result in flash floods. Rain falling on hot rocks can cause them to shatter, and the resulting frag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Arabidopsis Thaliana
''Arabidopsis thaliana'', the thale cress, mouse-ear cress or arabidopsis, is a small plant from the mustard family (Brassicaceae), native to Eurasia and Africa. Commonly found along the shoulders of roads and in disturbed land, it is generally considered a weed. A winter annual with a relatively short lifecycle, ''A. thaliana'' is a popular model organism in plant biology and genetics. For a complex multicellular eukaryote, ''A. thaliana'' has a relatively small genome of around 135 Base pair#Length measurements, megabase pairs. It was the first plant to have its genome sequenced, and is an important tool for understanding the molecular biology of many plant traits, including flower development and phototropism, light sensing. Description ''Arabidopsis thaliana'' is an annual plant, annual (rarely biennial plant, biennial) plant, usually growing to 20–25 cm tall. The leaf, leaves form a rosette at the base of the plant, with a few leaves also on the flowering Plant ste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Geophyte
A storage organ is a part of a plant specifically modified for storage of energy (generally in the form of carbohydrates) or water. Storage organs often grow underground, where they are better protected from attack by herbivores. Plants that have an underground storage organ are called geophytes in the Raunkiær plant life-form classification system.; reprinted (1977) in ''History of ecology'' series, New York: Arno Press, Storage organs often, but not always, act as perennating organs which enable plants to survive adverse conditions (such as cold, excessive heat, lack of light or drought). Relationship to perennating organ Storage organs may act as perennating organs ('perennating' as in perennial, meaning "through the year", used in the sense of continuing beyond the year and in due course lasting for multiple years). These are used by plants to survive adverse periods in the plant's life-cycle (e.g. caused by cold, excessive heat, lack of light or drought). During these per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Dicentra Canadensis
''Dicentra canadensis'', the squirrel corn, is a flowering plant from eastern North America with oddly shaped white flowers and finely divided leaves. Description Squirrel corn has small yellow clustered bulblets (looking roughly like kernels of corn), finely dissected leaves, and white heart-shaped flowers. The flowers are fragrant. It is a spring ephemeral, leafing out and flowering in spring and going dormant in summer. Distribution and habitat It is native to deciduous woodland in eastern North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri .... It is also found among rock outcrops near mountains. References * * ''Bleeding hearts, Corydalis, and their relatives''. Mark Tebbitt, Magnus Lidén, and Henrik Zetterlund. Timber Press. 2008. canadensis Ephemera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Dicentra Cucullaria
''Dicentra cucullaria'', Dutchman's britches, or Dutchman's breeches, is a perennial herbaceous plant, native to rich woods of eastern North America, with a disjunct population in the Columbia Basin. The common name Dutchman's breeches derives from their white flowers that look like white breeches. Description The rootstock is a cluster of small pink to white teardrop-shaped bulblets (more precisely, miniature tubers). Leaves are long and broad, with a petiole (leaf stalk) long. They are trifoliate, with finely divided leaflets. The flowers are usually white, rarely suffused with pink, long. They are produced in early spring in racemes of 3 to 14 flowers on peduncles (flower stalks) long. Unlike the closely related '' Dicentra canadensis'' (squirrel corn), the flowers lack fragrance. The pistil of a pollinated flower develops into a slender pod long and , narrowed to a point on both ends. The capsule splits in half when the seeds are ripe. The seeds are kidney-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Dicentra
''Dicentra'' (Ancient Greek, Greek ''dís'' "twice", ''kéntron'' "spur"), known collectively as the bleeding-hearts, is a genus containing eight species of herbaceous plant, herbaceous Flowering plant, flowering perennial plants with unique, "heart"-shaped Flower, flowers and finely divided Leaf, foliage. The species are, primarily, native plant, native to North America, although several are found in temperate East Asia. Description and growth requirements Flowers have two tiny sepals and four petals. The flowers are bisymmetric: the two outer petals are spur (botany), spurred or pouched at the base and curved outwards or backwards at the tip, and the two inner ones with or without a crest at the tip. In ''Dicentra'', all leaves are in a basal rosette (botany), rosette, and flowers are on leafless pedicel (botany), stalks. In other genera with bisymmetric heart-shaped flowers (''Lamprocapnos'', ''Dactylicapnos'', ''Ichtyoselmis'', ''Ehrendorferia''), leaves grow on stems as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Harbinger Of Spring
A harbinger is a forerunner or forewarning, but may also refer to: Companies * Harbinger Corp., an Internet-oriented business * Harbinger Capital, a hedge fund * Harbinger Knowledge Products, an eLearning products and content services company Fiction Characters * Harbinger (DC Comics), a character in ''Crisis on Infinite Earths'' * Harbingers (Valiant Comics), fictional characters in Valiant Comics * Harbinger, Earl a character in the Monster Hunter series by Larry Correia Books and comics * ''Harbinger'' (comic book), a comic book published by Valiant Comics * ''Harbinger'' (novel), a 2005 novel in the ''Star Trek: Vanguard'' series by David Mack * ''The Harbinger'' (novel), a 2011 novel by Jonathan Cahn * ''Harbingers'' (novel), a 2006 novel by F. Paul Wilson Film and television * ''Harbinger'' (film), a 2016 American eco-thriller film * "Harbinger" (''Star Trek: Enterprise''), a 2004 third-season episode of ''Star Trek: Enterprise'' * "The Harbinger" (''Star Wars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Trillium
''Trillium'' (trillium, wakerobin, toadshade, tri flower, birthroot, birthwort, and sometimes "wood lily") is a genus of about fifty flowering plant species in the family Melanthiaceae. ''Trillium'' species are native to temperate regions of North America and Asia, with the greatest diversity of species found in the southern Appalachian Mountains in the southeastern United States. Description Plants of this genus are perennial herbs growing from rhizomes. There are three large leaf-like bracts arranged in a whorl about a scape that rises directly from the rhizome. There are no true aboveground leaves but sometimes there are scale-like leaves on the underground rhizome. The bracts are photosynthetic and are sometimes called leaves. The inflorescence is a single flower with three green or reddish sepals and three petals in shades of red, purple, pink, white, yellow, or green. At the center of the flower there are six stamens and three stigmas borne on a very short style, if an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
