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Pentachaeta
''Pentachaeta'' is a genus of the family Asteraceae; the entire genus is endemic to California. Of the six species members, at least one, '' Pentachaeta bellidiflora'', is classified as an endangered species. The etymology of the genus name derives from Greek: ''Penta'' = five + ''chaeta'' = bristle, referring to the pappus scales of '' P. aurea''. It was combined in '' Chaetopappa'', but later work led to the genus being recognized as definitely separate. It is most closely related to ''Rigiopappus'' and '' Tracyina''. Pygmydaisy is a common name for ''Pentachaeta''. Description This genus consists of annual plants whose above surface architecture emanates from slender taproot, which appears smooth, but actually is covered by fine hairs. The stems are typically simple or branching in the lower half of plant, and they are erect, generally flexible, and of green to reddish color. ''Pentachaeta'' leaves are normally narrowly linear, ciliate and green. The terminal inflorescence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentachaeta Fragilis
''Pentachaeta'' is a genus of the family Asteraceae; the entire genus is endemic to California. Of the six species members, at least one, ''Pentachaeta bellidiflora'', is classified as an endangered species. The etymology Etymology ()The New Oxford Dictionary of English (1998) – p. 633 "Etymology /ˌɛtɪˈmɒlədʒi/ the study of the class in words and the way their meanings have changed throughout time". is the study of the history of the Phonological chan ... of the genus name derives from Greek: ''Penta'' = five + ''chaeta'' = bristle, referring to the pappus scales of ''Pentachaeta aurea, P. aurea''. It was combined in ''Chaetopappa'', but later work led to the genus being recognized as definitely separate. It is most closely related to ''Rigiopappus'' and ''Tracyina''. Pygmydaisy is a common name for ''Pentachaeta''. Description This genus consists of annual plants whose above surface architecture emanates from slender taproot, which appears smooth, but actually i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentachaeta Aurea
''Pentachaeta aurea'' is a species of flowering plant in the aster family known by the common names golden-rayed pentachaeta,''Pentachaeta aurea''. The Jepson Manual. golden chaetopappa,''Pentachaeta aurea''. USDA Plants Profile. and golden leastdaisy.''Pentachaeta aurea''. NatureServe. 2012. It is native to southern California, where it grows in the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentachaeta Bellidiflora
''Pentachaeta bellidiflora'', the white-rayed pentachaeta or whiteray pygmydaisy, is a Californian wildflower in the genus ''Pentachaeta'' of the family Asteraceae. It is included in both the state and federal lists of endangered species. It is endemic to the San Francisco Bay Area of California, United States, and occurs only at altitudes less than . ''P. bellidiflora'' is found chiefly on rocky, grassy areas. The conservation status of this species was, as of 1999, characterized by a declining population, with a severely diminished and fragmented range. The specific ''bellidiflora'' refers to the similarity of the flowers with those of common daisies (''Bellis''). Description ''Pentachaeta bellidiflora'' is a small annual wildflower growing from a slender taproot, which, although it appears smooth, is actually covered by fine hairs. The sparsely hairy stems may number between in length and are typically simple, or branching in the lower half of plant. They are erect, general ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentachaeta Exilis
''Pentachaeta exilis'' is a species of flowering plant in the family Asteraceae known by the common name meager pygmydaisy. It is endemic to California, where it is known from the North Coast Ranges to the southern Central Valley, San Joaquin Valley, and Sierra Nevada foothills. It is a member of grassland and woodland plant communities. Description ''Pentachaeta exilis'' is an annual herb with a hairy stem no more than about 6 centimeters tall. The narrow linear leaves are up to 3 centimeters long but only about a millimeter wide. The inflorescence is a solitary flower head, with up to 23 heads per plant. The two subspecies of the plant have different types of heads. Most individuals of the plant are of subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ... ''exil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentachaeta Lyonii
''Pentachaeta lyonii'', the Lyon's pentachaeta or Lyon's pygmydaisy, is an annual plant in the family Asteraceae. It is endemic to southern California, where it is now known only from a few areas on the heavily developed coastline of Los Angeles and Ventura Counties. It is a federally listed endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv .... Distribution At one point in time there were 43 populations of ''P. lyonii'' distributed among the Santa Monica Mountains, Simi Valley, Palos Verdes Peninsula and Catalina Island. In a 2006 search only 21 ''Pentacheata'' populations could be located, with occurrences on the Palos Verdes Peninsula having long been deemed extirpated. Populations on Catalina Island were thought to be extirpated until 112 individual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentachaeta Alsinoides
''Pentachaeta alsinoides'', the tiny pygmydaisy, is a species of flowering plant in the family Asteraceae endemic to California. It is an annual, low, slender, diffuse, somewhat villous; leaves filiform or nearly so; disk flowers reddish, ray flowers inconspicuous. References External linksJepson Manual Treatment External linksCalflora Database: ''Pentachaeta alsinoides'' (Tiny pygmy daisy) Astereae Endemic flora of California [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rigiopappus
''Rigiopappus'' is a genus of North American plants in the tribe Astereae within the family Asteraceae. It is closely related to genus '' Pentachaeta''. ;Species The only known species is ''Rigiopappus leptocladus'', sometimes known as wireweed. It is an annual plant sending up slender stems terminating in small daisylike yellow flowers. It is native to the western United States (California, Nevada, Oregon, Washington, Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...). References External links *Jepson Manual Treatment [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural History Of The California Chaparral And Woodlands
Nature, in the broadest sense, is the physics, physical world or universe. "Nature" can refer to the phenomenon, phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are part of nature, human activity is often understood as a separate category from other natural phenomena. The word ''nature'' is borrowed from the Old French ''nature'' and is derived from the Latin word ''natura'', or "essential qualities, innate disposition", and in ancient times, literally meant "birth". In ancient philosophy, ''natura'' is mostly used as the Latin translation of the Greek word ''physis'' (φύσις), which originally related to the intrinsic characteristics of plants, animals, and other features of the world to develop of their own accord. The concept of nature as a whole, the physical universe, is one of several expansions of the original notion; it began with certain core applications of the word ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Flora Of California
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteraceae Genera
The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae were first described in the year 1740. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of extant species in each family is unknown. Most species of Asteraceae are annual, biennial, or perennial herbaceous plants, but there are also shrubs, vines, and trees. The family has a widespread distribution, from subpolar to tropical regions in a wide variety of habitats. Most occur in hot desert and cold or hot semi-desert climates, and they are found on every continent but Antarctica. The primary common characteristic is the existence of sometimes hundreds of tiny individual florets which are held together by protective involucres in flower heads, or more technically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corolla (flower)
Petals are modified leaves that surround the reproductive parts of flowers. They are often brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''corolla''. Petals are usually accompanied by another set of modified leaves called sepals, that collectively form the ''calyx'' and lie just beneath the corolla. The calyx and the corolla together make up the perianth, the non-reproductive portion of a flower. When the petals and sepals of a flower are difficult to distinguish, they are collectively called tepals. Examples of plants in which the term ''tepal'' is appropriate include genera such as '' Aloe'' and ''Tulipa''. Conversely, genera such as ''Rosa'' and '' Phaseolus'' have well-distinguished sepals and petals. When the undifferentiated tepals resemble petals, they are referred to as "petaloid", as in petaloid monocots, orders of monocots with brightly colored tepals. Since they include Liliales, an alternative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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