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Ambrosia Pumila
''Ambrosia pumila'' is a rare species of herbaceous perennial plant known by the common names San Diego ragweed and San Diego ambrosia. It is native to far southern California, Baja California, and Baja California Sur. It grows in floodplains and open grasslands in proximity to wetland areas. Distribution It is adapted to dry habitat, but only on upper floodplain fringes, or adjoining depressions containing vernal pools or similar structures.USFWSFinal Rule Designating Critical Habitat for ''Ambrosia pumila'' (San Diego ambrosia).''Federal Register'' November 30, 2010. It is a plant of open habitat and is not tolerant of heavy shade. Today it is known from 19 populations. Fourteen of them are in San Diego County, California, San Diego County, two exist in Riverside County, California, Riverside County, and there are three south of the border in Baja California and Baja California Sur in Mexico. Most of its native habitat has been consumed by urbanization and development. It is al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Nuttall
Thomas Nuttall (5 January 1786 – 10 September 1859) was an England, English botany, botanist and zoologist who lived and worked in America from 1808 until 1841. Nuttall was born in the village of Long Preston, near Settle, North Yorkshire, Settle in the West Riding of Yorkshire and spent some years as an apprentice printer in England. Soon after going to the United States he met professor Benjamin Smith Barton in Philadelphia. Barton encouraged his strong interest in natural history. Early explorations in the United States In 1810 he travelled to the Great Lakes and in 1811 travelled on the Astor Expedition led by William Price Hunt on behalf of John Jacob Astor up the Missouri River. Nuttall was accompanied by the English botanist John Bradbury (naturalist), John Bradbury, who was collecting plants on behalf of Liverpool botanical gardens. Nuttall and Bradbury left the party at the trading post with the Arikara Indians in South Dakota, and continued farther upriver with Rams ... [...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] |
Introduced Species
An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived there by human activity, directly or indirectly, and either deliberately or accidentally. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are considered naturalized. The process of human-caused introduction is distinguished from biological colonization, in which species spread to new areas through "natural" (non-human) means such as storms and rafting. The Latin expression neobiota captures the characteristic that these species are ''new'' biota to their environment in terms of established biological network (e.g. food web) relationships. Neobiota can further be divided into neozoa (also: neozoons, sing. neozoon, i.e. animals) and neophyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego National Wildlife Refuge
San Diego National Wildlife Refuge is a National Wildlife Refuge in California. It is part of the San Diego National Wildlife Refuge Complex. A variety of habitats from coastal sage scrub and chaparral to oak woodland and freshwater marsh describe this inland refuge in San Diego's backcountry. The Living Coast Discovery Center is located in the Sweetwater Marsh Unit adjacent to the administrative headquarters for the US Fish & Wildlife Service. The Center features exhibits of marine life, birds and plants found the San Diego Bay, and partners with the Refuge to offer environmental education programs. There are 1.5 miles of trails with access to the Bay. The Otay-Sweetwater Unit of the San Diego National Wildlife Refuge is part of the National Wildlife Refuge System's contribution to the Multiple Species Conservation Plan, a program designed to conserve enough open space and habitat for species survival while enabling orderly development to occur where necessary. It is clos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mission Trails Regional Park
Mission Trails Regional Park is a open space preserve within the city of San Diego, California, established in 1974. It is the sixth-largest municipally owned park in the United States, and the largest in California. Description The park consists mostly of rugged canyons and hills, with both natural and developed recreation areas, including beautiful flowers. It is the seventh-largest open space urban park in the United States, consisting of nearly . The highest point is Cowles Mountain, which is also the highest point in the city of San Diego. The San Diego River flows through the park. A one-way access road goes through the park, allowing hikers, bikers and pedestrians on one side and cars on the other. The park is open every day of the year. The park has 60 miles of hiking, mountain bike and equestrian trails, a rock climbing area, and the Kumeyaay Lake Campground with 46 camp sites adjacent to a small lake. There is also the Mission Trails Regional Park Visitor and I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Hodges
Lake Hodges is a lake and reservoir located within the city limits of San Diego, California. It is about north of Downtown San Diego, just north of the Rancho Bernardo community, and just south of the city's border with Escondido. When full, the reservoir has , a maximum water depth of , and of shoreline. Lake Hodges has a total capacity of 30,251 acre-feet of water. Lake Hodges is owned by the city of San Diego, supplies water to thSan Dieguito Water DistrictanSanta Fe Irrigation District and its mailing city address is Escondido. Water level elevation in the lake is maintained at a maximum of above sea level, lower than the dam's maximum of spillway to ensure safe operations. The lake level can fluctuate significantly, depending upon the amount of runoff received from the San Dieguito River drainage basin. Interstate 15 crosses Lake Hodges via the Lake Hodges Bridge. Approximately west of the I-15 freeway bridge is a bicycle/pedestrian bridge which opened on May 15, 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fallbrook, California
Fallbrook is a CDP in northern San Diego County, California. Fallbrook had a population of 30,534 at the 2010 census, up from 29,100 at the 2000 census. Fallbrook's downtown is not on a major highway route. It is west of Interstate 15 or north of State Route 76. Fallbrook is immediately east of the U.S. Marine Corps' Camp Pendleton. It once housed a stagecoach stop for the stage that ran from Temecula to San Diego. Fallbrook is known for its avocado groves and claims, without any official recognition, the title "Avocado Capital of the World". It is often called or known as "The Friendly Village". The Avocado Festival is held in the downtown strip annually and frequently draws large crowds. History The community of Fallbrook was first settled by the Payomkawichum people, later called Luiseños by the Spanish missionaries who were present in the area in the late 1700s. Large village sites and oak groves were established by the Luiseños. One site in particular became the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanside, California
Oceanside is a city on the South Coast (California), South Coast of California, located in San Diego County, California, San Diego County. The city had a population of 167,086 at the 2010 United States Census, 2010 census. The city is a popular tourist destination, owing to its historic landmarks, beaches, and architecture. Oceanside's origins date to 1798, when the Spanish founded the village of San Luis Rey, Oceanside, California, San Luis Rey with the establishment of Mission San Luis Rey de Francia by Fermín de Lasuén. During the Spanish period, Mission San Luis Rey grew to be the largest of all the Spanish missions in California, Californian missions, but following the Mexican secularization act of 1833 the mission and its community declined. Following the Conquest of California, U.S. conquest of California, the former mission lands were developed into an oceanfront resort and the community's name gradually changed to Oceanside. History Originally inhabited by Native A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temecula, California
Temecula (; es, Temécula, ; Luiseño: ''Temeekunga'') is a city in southwestern Riverside County, California, United States. The city had a population of 110,003 as of the 2020 census and was incorporated on December 1, 1989. The city is a tourist and resort destination, with the Temecula Valley Wine Country, Old Town Temecula, the Temecula Valley Balloon & Wine Festival, the Temecula Valley International Film Festival, championship golf courses, and resort accommodations contributing to the city's economic profile. The city of Temecula, forming the southwestern anchor of the Inland Empire region, is approximately north of downtown San Diego and southeast of downtown Los Angeles. Although Temecula is geographically closer to downtown San Diego than downtown Los Angeles, it is considered part of the Greater Los Angeles area. Temecula is bordered by the city of Murrieta to the north and the Pechanga Indian Reservation and San Diego County to the south. History Pre-1800 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizome
In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow horizontally. The rhizome also retains the ability to allow new shoots to grow upwards. A rhizome is the main stem of the plant that runs underground horizontally. A stolon is similar to a rhizome, but a stolon sprouts from an existing stem, has long internodes, and generates new shoots at the end, such as in the strawberry plant. In general, rhizomes have short internodes, send out roots from the bottom of the nodes, and generate new upward-growing shoots from the top of the nodes. A stem tuber is a thickened part of a rhizome or stolon that has been enlarged for use as a storage organ. In general, a tuber is high in starch, e.g. the potato, which is a modified stolon. The term "tuber" is often used imprecisely and is sometimes applied to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vegetative Reproduction
Vegetative reproduction (also known as vegetative propagation, vegetative multiplication or cloning) is any form of asexual reproduction occurring in plants in which a new plant grows from a fragment or cutting of the parent plant or specialized reproductive structures, which are sometimes called vegetative propagules. Many plants naturally reproduce this way, but it can also be induced artificially. Horticulturists have developed asexual propagation techniques that use vegetative propagules to replicate plants. Success rates and difficulty of propagation vary greatly. Monocotyledons typically lack a vascular cambium, making them more challenging to propagate. Background Plant propagation is the process of plant reproduction of a species or cultivar, and it can be sexual or asexual. It can happen through the use of vegetative parts of the plants, such as leaves, stems, and roots to produce new plants or through growth from specialized vegetative plant parts. While m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burr (fruit)
A bur (also spelled burr) is a seed or dry fruit or infructescence that has hooks or teeth. The main function of the bur is to spread the seeds of the bur plant, often through epizoochory. The hooks of the bur are used to catch on to for example fur or fabric, so that the bur, which contain seeds, then can be transported along with the thing it attached itself to. Another use for the spines and hooks are physical protection against herbivores. Their ability to stick to animals and fabrics has shaped their reputation as bothersome. Some other forms of diaspores, such as the stems of certain species of cactus also are covered with thorns and may function as burs. Bur-bearing plants such as ''Xanthium'' species are often single-stemmed when growing in dense groups, but branch and spread when growing singly. The number of burs per fruit along with the size and shape can vary largely between different bur plants. Function Containing seeds, burs spread through catching on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
