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Tithonia
''Tithonia'' is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae. ''Tithonia'' has a center of distribution in Mexico but with one species extending into the Southwestern United States and several native to Central America. Two species, '' T. diversifolia'' and '' T. rotundifolia'', are widely cultivated and have escaped to become weeds in tropical and subtropical areas around the world. '' T. rotundifolia'' makes a nice fresh cut flower, flowering in mid- to late-summer in the Northern hemisphere. The distinguishing feature of the genus is the peduncle, which is fistulose (meaning hollow and flaring toward the apex). The plants are coarse annual or perennial herbs or shrubs, and one species, '' T. koelzii'', is a small tree. ; SpeciesFlann, C (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonia Calva
''Tithonia'' is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae. ''Tithonia'' has a center of distribution in Mexico but with one species extending into the Southwestern United States and several native to Central America. Two species, '' T. diversifolia'' and '' T. rotundifolia'', are widely cultivated and have escaped to become weeds in tropical and subtropical areas around the world. '' T. rotundifolia'' makes a nice fresh cut flower, flowering in mid- to late-summer in the Northern hemisphere. The distinguishing feature of the genus is the peduncle, which is fistulose (meaning hollow and flaring toward the apex). The plants are coarse annual or perennial herbs or shrubs, and one species, '' T. koelzii'', is a small tree. ; SpeciesFlann, C (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonia Brachypappa
''Tithonia'' is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae. ''Tithonia'' has a center of distribution in Mexico but with one species extending into the Southwestern United States and several native to Central America. Two species, '' T. diversifolia'' and '' T. rotundifolia'', are widely cultivated and have escaped to become weeds in tropical and subtropical areas around the world. '' T. rotundifolia'' makes a nice fresh cut flower, flowering in mid- to late-summer in the Northern hemisphere. The distinguishing feature of the genus is the peduncle, which is fistulose (meaning hollow and flaring toward the apex). The plants are coarse annual or perennial herbs or shrubs, and one species, '' T. koelzii'', is a small tree. ; SpeciesFlann, C (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonia Koelzii
''Tithonia'' is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae. ''Tithonia'' has a center of distribution in Mexico but with one species extending into the Southwestern United States and several native to Central America. Two species, '' T. diversifolia'' and '' T. rotundifolia'', are widely cultivated and have escaped to become weeds in tropical and subtropical areas around the world. '' T. rotundifolia'' makes a nice fresh cut flower, flowering in mid- to late-summer in the Northern hemisphere. The distinguishing feature of the genus is the peduncle, which is fistulose (meaning hollow and flaring toward the apex). The plants are coarse annual or perennial herbs or shrubs, and one species, '' T. koelzii'', is a small tree. ; SpeciesFlann, C (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonia Diversifolia
''Tithonia diversifolia'' is a species of flowering plant in the family Asteraceae that is commonly known as the tree marigold, Mexican tournesol, Mexican sunflower, Japanese sunflower or Nitobe chrysanthemum. It is native to Mexico and Central America but has a nearly pantropical distribution as an introduced species. Depending on the area they may be either annual or perennial. It has shown great potential in raising the soil fertility in soils depleted in nutrients. Originating in Mexico; research has shown its potential in benefiting poor African farmers. This plant is a weed that grows quickly and has become an option as an affordable alternative to expensive synthetic fertilizers.Jama et al. 2000, p.202 It has shown to increase plant yields and the soil nutrients of nitrogen (N), phosphorus (P), and potassium (K). Description ''Tithonia diversifolia'' is in height with upright and sometimes ligneous stalks in the form of woody shrubs. The large, showy flowers are yellow to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonia Rotundifolia
''Tithonia rotundifolia'', the red sunflower or Mexican sunflower, is a plant in the family Asteraceae, which is native to the warmer and moister parts of North America. Range It occurs in Florida, Louisiana, Mexico, Central America and the West Indies The West Indies is a subregion of North America, surrounded by the North Atlantic Ocean and the Caribbean Sea that includes 13 independent island countries and 18 dependencies and other territories in three major archipelagos: the Greater A .... Outside its native region it is sometimes grown as an ornamental and has become naturalized in some of these locales. In Africa it has been recorded up to an altitude of 1,580 m above sea level. Description Plants are perennial in the native habitat, up to 4 m tall with orange or red flowers. In USDA zones cooler than Zone 10 it is an annual. The flowers are used by many insects as a nectar source including migrating monarch butterflies. Leaves, despite the epithet, are deltoid to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliantheae
The Heliantheae (sometimes called the sunflower tribe) are the third-largest tribe in the sunflower family (Asteraceae). With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus ''Helianthus'', which is Greek for sun flower. Most genera and species are found in North America (particularly in Mexico) and South America. A few genera are pantropical. Most Heliantheae are herbs or shrubs, but some grow to the size of small trees. Leaves are usually hairy and arranged in opposite pairs. The anthers are usually blackened. The above statements about the size and distribution of the tribe apply to a broad definition of Heliantheae, which was followed throughout the 20th century. Some recent authors break the tribe up into a dozen or so smaller tribes. Uses Commercially important plants in the Heliantheae include sunflower and Jerusalem artichoke. Many garden flowers are also in this group, such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple stems and shorter height, less than tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed as subshrubs. Many botanical groups have species that are shrubs, and others that are trees and herbaceous plants instead. Some definitions state that a shrub is less than and a tree is over 6 m. Others use as the cut-off point for classification. Many species of tree may not reach this mature height because of hostile less than ideal growing conditions, and resemble a shrub-sized plant. However, such species have the potential to grow taller under the ideal growing conditions for that plant. In terms of longevity, most shrubs fit in a class between perennials and trees; some may only last about five y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Africa
Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area.Sayre, April Pulley (1999), ''Africa'', Twenty-First Century Books. . With billion people as of , it accounts for about of the world's human population. Africa's population is the youngest amongst all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Despite a wide range of natural resources, Africa is the least wealthy continent per capita and second-least wealthy by total wealth, behind Oceania. Scholars have attributed this to different factors including geography, climate, tribalism, colonialism, the Cold War, neocolonialism, lack of democracy, and corruption. Despite this low concentration of wealth, recent economic expansion and the large and young population make Afr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's List of countries and dependencies by area, sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a Megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and climates, with Deserts of Australia, deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approximately Early human migrations#Nearby Oceania, 65,000 years ago, during the Last Glacial Period, last i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asia
Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area of , about 30% of Earth's total land area and 8.7% of Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations. Its 4.7 billion people constitute roughly 60% of the world's population. In general terms, Asia is bounded on the east by the Pacific Ocean, on the south by the Indian Ocean, and on the north by the Arctic Ocean. The border of Asia with Europe is a historical and cultural construct, as there is no clear physical and geographical separation between them. It is somewhat arbitrary and has moved since its first conception in classical antiquity. The division of Eurasia into two continents reflects East–West cultural, linguistic, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asa Gray
Asa Gray (November 18, 1810 – January 30, 1888) is considered the most important American botanist of the 19th century. His ''Darwiniana'' was considered an important explanation of how religion and science were not necessarily mutually exclusive. Gray was adamant that a genetic connection must exist between all members of a species. He was also strongly opposed to the ideas of hybridization within one generation and special creation in the sense of its not allowing for evolution. He was a strong supporter of Darwin, although Gray's theistic evolution was guided by a Creator. As a professor of botany at Harvard University for several decades, Gray regularly visited, and corresponded with, many of the leading natural scientists of the era, including Charles Darwin, who held great regard for him. Gray made several trips to Europe to collaborate with leading European scientists of the era, as well as trips to the southern and western United States. He also built an extensive ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Hemsley (botanist)
William Botting Hemsley (29 December 1843, in East Hoathly – 7 October 1924, in Kent) was an English botanist and 1909 Victoria Medal of Honour recipient. He was born in East Hoathly, Sussex and in 1860 started work at the Royal Botanic Gardens, Kew as an Improver, then Assistant for India in the Herbarium, finally Keeper of Herbarium and Library. He wrote a number of botanical works. In 1888, a genus of flowering plants from south-east Asia, belonging to the family Cucurbitaceae was named '' Hemsleya'' in his honour. He was elected a Fellow of the Royal Society Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the judges of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural knowledge, including mathemat ... in June 1889. Publications * * ''Biologica Centrali-Americana Botany. Vol. I '', 1879–1888 * Biologica Centrali-Americana Botany. Vol. III', 1882–1886 * ''Botany ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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