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Stegophylla Essigi
''Stegophylla essigi'', also known as the California woolly oak aphid, is a species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ... of North American aphid. It had been found on many California oaks, including blue oaks, valley oaks, Oregon white oaks, coast live oaks, interior live oaks, California black oaks, and scrub oaks. Woolly oak aphids overwinter as eggs. Several generations develop each year. In the spring, females reproduce parthenogenically (without mating). In the fall, male and female aphids are produced. Adult males may be either winged or wingless. For ''S. essigi'', oviparae and both wingless and winged males are produced in November. Populations of ''S. essigi'' may continue to reproduce parthenogenically on evergreen oaks such as coast live oak, espec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Ord National Monument
Fort Ord is a former United States Army post on Monterey Bay on the Pacific Ocean coast in California, which closed in 1994 due to Base Realignment and Closure (BRAC) action. Most of the fort's land now makes up the Fort Ord National Monument, managed by the United States Bureau of Land Management as part of the National Conservation Lands, while a small portion remains an active military installation under Army control, designated the Ord Military Community. Before construction and official designation as a fort in 1940, the land was used as a maneuver area and field-artillery target range beginning in 1917. Fort Ord was considered one of the most attractive locations of any U.S. Army post, because of its proximity to the beach and California weather. The 7th Infantry Division was its main garrison for many years. When Fort Ord was later converted to civilian use, space was set aside for the first nature reserve in the United States created for conservation of an insect, the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Douglasii
''Quercus douglasii'', known as blue oak, is a species of oak endemic to California, common in the Coast Ranges and the foothills of the Sierra Nevada. It is California's most drought-tolerant deciduous oak, and is a dominant species in the blue oak woodland ecosystem. It is occasionally known as mountain oak and iron oak. Description ''Quercus douglasii'' is a medium-sized tree with sparse foliage, generally tall, with a trunk in diameter at breast height. Trunks are typically solitary, but some trees have multiple trunks. The tallest recorded specimen was found in Alameda County, at . The trees grow slowly, about per year. Individual trees over 500 years old have been recorded. The bark is light gray with many medium-sized dark cracks. The blue-green leaves are tough and leathery, deciduous, long, and entire or shallowly lobed. The acorns are long, with a moderately sweet kernel, and mature in 6–7 months from pollination. ''Q. douglasii'' is monoecious and wind-po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Lobata
''Quercus lobata'', commonly called the valley oak or roble, is the largest of the California oaks. It is endemic to the state, growing in interior valleys and foothills from Siskiyou to San Diego counties. Deciduous, it requires year-round groundwater, and may live up to 600 years. Its thick, ridged bark (resembling alligator hide) and deeply lobed leaves are characteristic, and assist in identification. Description The valley oak may surpass in height, with a sturdy trunk possibly exceeding in diameter. The "Henley Oak", in Covelo, California, is the tallest known valley oak, at . The branches have an irregular, spreading and arching appearance. During autumn, the leaves turn a yellow to light orange color but become brown later in the season. In advancing age, the branches droop. The trees have pewter-colored rippled bark. Typically, the leaves are long and are roundly and deeply lobed. The leaf width is approximately one half its length. Each leaf is matte green with an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Garryana
''Quercus garryana'' is an oak tree species named for Nicholas Garry, deputy governor of the Hudson's Bay Company. It is commonly known as the Garry oak, Oregon white oak or Oregon oak. The species is found in the Pacific Northwest, with a range stretching from southern California to southwestern British Columbia. Description ''Quercus garryana'' is typically of medium height, growing slowly to around and occasionally as high as , or in shrub form to tall. The trunks grow to thick, exceptionally . The Bark (botany), bark is gray and fissured. It has the characteristic oval profile of other oaks when solitary, but is also known to grow in groves close enough together that crowns may form a canopy. The leaves are deciduous, long and 1–3 in broad, with 3–7 deep lobes on each side, darker green on top and finely haired below. The flowers are catkins. The fruit a small acorn long, rarely in, and broad, with shallow, scaly cups. Its fall color is unspectacular, with many tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Agrifolia
''Quercus agrifolia'', the California live oak, or coast live oak, is an evergreen live oak native to the California Floristic Province. Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. Coast live oaks may be shrubby, depending on age and growing location, but is generally a medium-sized tree. It grows west of the Sierra Nevada mountain range from Mendocino County, California, south to northern Baja California in Mexico. It is classified in the red oak section of oaks (''Quercus'' sect. ''Lobatae''), subsection ''Agrifoliae''. This species is commonly sympatric with canyon live oak (''Q. chrysolepis''), and the two may be hard to distinguish because their spinose leaves are superficially similar. Description Coast live oak typically has a much-branched trunk and reaches a mature height of . Some spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Wislizeni
''Quercus wislizeni'', known by the common name interior live oak, is an evergreen oak, highly variable and often shrubby, found in western North America. Description It is a large shrub or tree growing to tall, although where it is common in the low-elevation Sierra Nevada foothills it seldom exceeds . The dark-green leaves—appearing grayish from a distance—are usually small, long, thick, and often spiny-toothed at higher elevations, particularly on young trees. The male flowers are on catkins, the female flowers in groups of 2–4 in leaf axils. The acorns are long, and mature the second season (about 18 months) after flowering. Specimens can live for up to 200 years. Taxonomy Although originally published by Alphonse Pyramus de Candolle as "wislizeni", some sources mistakenly spelled the specific epithet "wislizenii". Correct spelling is with one "I", per ICN article 60C.2. Friedrich Adolph Wislizenus's specimen was thought by de Candolle to have been colle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Kelloggii
''Quercus kelloggii'', the California black oak or Kellogg oak, is an oak in the red oak section (genus ''Quercus'', section ''Lobatae'', series ''Agrifoliae'') native to western North America. Description ''Quercus kelloggii'' grows from one to several vertical roots which penetrate to bedrock, with large, laterally spreading roots extending off from vertical ones. It also has a number of surface roots. It can reproduce vegetatively with new growth sprouting from the root crown after the tree is top-killed by wildfire, logging, frost, or other events. While individual trees generally have a lifespan between 100 and 200 years, California black oak can live up to 500 years. The tree typically grows from in height and from in diameter. Large trees may exceed in height and diameter, with the record holder measuring tall and thick (in the Siskiyou National Forest in Oregon). The species also grows in shrubby scrub-oak form on poor sites. In open areas, the crown is bro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scrub Oaks
Scrub oak is a common name for several species of small, shrubby oaks. It may refer to: *the Chaparral plant community in California, or to one of the following species. In California *California scrub oak (''Quercus berberidifolia''), a widespread species commonly referred to as scrub oak *Coastal scrub oak ('' Quercus dumosa''), although currently defined in a narrow sense, has been applied to other scrub oaks now considered separate species ;Other California species referred to as "scrub oaks" *Leather oak ('' Quercus durata'') *Tucker oak (''Quercus john-tuckeri'') *Island scrub oak (''Quercus pacifica'') In the Southwestern United States *Coahuila scrub oak ('' Quercus intricata''), in the US, it is reported at only two sites: One in the Chisos Mountains inside Big Bend National Park, and the other 15 miles SW of Van Horn. *Gambel oak (''Quercus gambelii'')The hybrid of ''Q. gambelii'' and ''Q. turbinella'' is ''Quercus × pauciloba'', synonym ''Quercus undulata''. *Gray o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insects Described In 1892
Insects (from Latin ') are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes, and a pair of antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. The insect nervous system consists of a brain and a ventral nerve cord. Most insects reproduce by laying eggs. Insects breathe air through a system of paired openings along their sides, connected to small tubes that take air directly to the tissues. The blood therefore does not carry oxygen; it is only partly contained in vessels, and some circulates in an open hemocoel. Insect vision is mainly through their compound eyes, with additional small ocelli. Many insects can hear, using tympanal organs, which may be on the legs or other parts of the body. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insects Of The United States
Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, Thorax (insect anatomy), thorax and abdomen (insect anatomy), abdomen), three pairs of jointed Arthropod leg, legs, compound eyes, and a pair of antenna (biology), antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. The insect nervous system consists of a insect brain, brain and a ventral nerve cord. Most insects reproduce Oviparous, by laying eggs. Insects Respiratory system of insects, breathe air through a system of Spiracle (arthropods), paired openings along their sides, connected to Trachea#Invertebrates, small tubes that take air directly to the tissues. The blood therefore does not carry oxygen; it is only partly contained in ves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
