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Achnatherum Diegoense
''Thorneochloa'' is a genus of flowering plants belonging to the family Poaceae. It contains a single species, ''Thorneochloa diegoensis'', commonly known as San Diego needlegrass. It is a perennial grass native to southern California and northern Baja California. Description ''Thorneochloa diegoensis'' is a bunching perennial grass with culms (stems) between tall in an erect or ascending habit. The culms are thick, and characteristically below the lower nodes the internodes have a dense pubescence of retrorse (pointing downward) hairs. The leaf sheath may be glabrous or pubescent, and the collar with a tuft of hairs that measure long. The leaf blades are long by wide. The inflorescence, a narrow, densely-flowered panicle, is up to long, with ascending, appressed branches. The pedicels are usually shorter than the spikelets. The spikelet is lanceolate with a single fertile floret. The glumes are long. The floret and lemma are long, the lemma evenly hairy and its margi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plants Of The World Online
Plants of the World Online (POWO) is an online taxonomic database published by the Royal Botanic Gardens, Kew. History Following the Convention on Biological Diversity, the Royal Botanic Gardens in Kew launched Plants of the World Online in March 2017 with the goal of creating an exhaustive online database of all seed-bearing plants worldwide. (Govaerts wrongly speaks of "Convention for Botanical Diversity (CBD)). The initial focus was on tropical African flora, particularly flora ''Zambesiaca'', flora of West and East Tropical Africa. Since March 2024, the website has displayed AI-generated predictions of the extinction risk for each plant. Description The database uses the same taxonomical source as the International Plant Names Index, which is the World Checklist of Vascular Plants (WCVP). The database contains information on the world's flora gathered from 250 years of botanical research. It aims to make available data from projects that no longer have an online ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stipeae
The Stipeae are a tribe of grasses within the subfamily Pooidae, with up to 600 described species. Description The defining morphological features of the Stipeae include single-flowered spikelets lacking a rachilla extension, and the lemmas (the external bract) have either a sharp point or a terminal awn (long bristle). Genera The tribe includes 32 genera: Many species initially placed into ''Stipa'' have now been split off into new genera. Some recent papers have analysed relationships within and between the genera, but a complete analysis has not yet been performed. Stipoid grasses use the C3 photosynthetic pathway and live in temperate areas worldwide. Known fossils date from the late Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea .... References External ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaparral
Chaparral ( ) is a shrubland plant plant community, community found primarily in California, southern Oregon, and northern Baja California. It is shaped by a Mediterranean climate (mild wet winters and hot dry summers) and infrequent, high-intensity crown fires. Many chaparral shrubs have hard sclerophyllous evergreen leaves, as contrasted with the associated soft-leaved, drought-deciduous, scrub community of coastal sage scrub, found often on drier, southern-facing slopes. Three other closely related chaparral shrubland systems occur in southern Arizona, western Texas, and along the eastern side of central Mexico's mountain chains, all having summer rains in contrast to the Mediterranean climate of other chaparral formations. Etymology The name comes from the Spanish language, Spanish word , which translates to "place of the scrub oak". ''Scrub oak'' in turn comes from the Basque language, Basque word , which has the same meaning. Overview In its natural state, chaparral is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego Natural History Museum
The San Diego Natural History Museum is a museum in Balboa Park in San Diego, California. It was founded in 1874 as the San Diego Society of Natural History. It is the second oldest scientific institution west of the Mississippi and the oldest in Southern California. The present location of the museum was dedicated on January 14, 1933. A major addition to the museum was dedicated in April 2001, doubling exhibit space. History The San Diego Natural History Museum grew out of the San Diego Society of Natural History, which was founded on October 9,1874. The Natural History Society was founded by George W. Barnes, Daniel Cleveland, Charles Coleman, E. W. Hendrick and O. N. Sanford. It is the oldest scientific institution in southern California, and the second oldest west of the Mississippi. In its initial years, the San Diego Society of Natural History was the region's primary source of scientific culture, serving a small but growing community eager for information about its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isla Todos Santos
Isla Todos Santos is a pair of islands about off Ensenada, Baja California, at best known for surfing. Access is only by boat, which can be rented in Ensenada, or La Bufadora. The waves off the smallest island are among the biggest in North America. There are no facilities on the islands except for two lighthouses and a fish farm operation. Fauna The islands are (or were) home to ''Aimophila ruficeps sanctorum'', an endemic Endemism is the state of a species being found only 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 foun ... subspecies of the Rufous-crowned sparrow, which is probably extinct. It was previously home to Anthony's woodrat, which is now extinct. It is home to a critically endangered subspecies, the Todos Santos Island Kingsnake, of the California mountain kingsnake. The type species of the fish genus '' Bajacal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Quintín, Baja California
is a city in San Quintín Municipality, Baja California, located on the Pacific Coast of Mexico. The city had a population of 4777 in 2011. San Quintín is an important agricultural center for Baja California. History In the early 1800s the sea otters of San Quintín Bay were targeted by a series of joint ventures between American maritime fur traders and the Russian–American Company (RAC). The first such venture involved the Boston-based maritime fur trading merchant ship ''O'Cain''. RAC Chief Manager Alexander Baranov supplied ''O'Cain'' with twenty baidarkas (Aleutian kayaks) and about forty indigenous Alaskan sea otter hunters, plus two overseers to manage the hunters and hunting, Afanasii Shvetsov and Timofei Tarakanov. ''O'Cain'' sailed to San Quintín Bay and stayed for over three months while Tarakanov and Shvetsov led indigenous sea otter hunting parties all along the coast between Mission Rosario and Misión Santo Domingo de la Frontera. Several other US-Ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peninsular Ranges
The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Pacific Coast Ranges, which run along the Pacific coast from Alaska to Mexico. Elevations range from . Geography The Peninsular Ranges include the Santa Ana Mountains, the Temescal Mountains, other mountains and ranges of the Perris Block, the San Jacinto Mountains, the Laguna Mountains of southern California continuing from north to south with the Sierra de Juárez, the Sierra de San Pedro Mártir, the Sierra de San Borja, the Sierra de San Francisco, the Sierra de la Giganta, and the Sierra de la Laguna in Baja California. Palomar Mountain, home to Palomar Observatory, is in the Peninsular Ranges in San Diego County, as are the San Ysidro Mountains and Viejas Mountain. The Peninsular Ranges run predominantly north-south, unlike the Transverse R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego County, California
San Diego County (), officially the County of San Diego, is a county (United States), county in the southwest corner of the U.S. state of California, north to its Mexico-United States border, border with Mexico. As of the 2020 United States Census, 2020 census, the population was 3,298,634; it is the second-most populous county in California and the County statistics of the United States, fifth-most populous in the United States. Its county seat is San Diego, the List of largest cities in California by population, second-most populous city in California and the List of United States cities by population, eighth-most populous in the United States. It is the southwesternmost county in the 48 contiguous United States, and is a List of municipalities and counties on the Mexico–United States border#California, border county. It is home to 18 Indian reservation, Indian reservations, the most of any county in the United States. There are 16 :Military facilities in San Diego County, Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Nicolas Island
San Nicolas Island (Spanish: ''Isla de San Nicolás''; Tongva: ''Haraasnga'') is the most remote of the Channel Islands, off Southern California, from the nearest point on the mainland coast. It is part of Ventura County. The island is currently controlled by the United States Navy and is used as a weapons testing and training facility, served by Naval Outlying Landing Field San Nicolas Island. The uninhabited island is defined by the United States Census Bureau as Block Group 9, Census Tract 36.04 of Ventura County, California. The Nicoleño Native American tribe inhabited the island until 1835. As of the 2000 U.S. Census, the island has since remained officially uninhabited, though the census estimates that at least 200 military and civilian personnel live on the island at any given time. The island has a small airport, though the runway is the second-longest in Ventura County (slightly behind the one at Naval Air Station Point Mugu). Additionally, there are several buil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channel Islands (California)
The Channel Islands () are an eight-island archipelago located within the Southern California Bight in the Pacific Ocean, off the coast of California. They define the Santa Barbara Channel between the islands and the California mainland. The four Northern Channel Islands are part of the Transverse Ranges geologic province, and the four Southern Channel Islands are part of the Peninsular Ranges province. Five of the islands are within the Channel Islands National Park. The waters surrounding these islands make up Channel Islands National Marine Sanctuary. The Nature Conservancy was instrumental in establishing the Channel Islands National Marine Sanctuary. There is evidence that humans have lived on the Northen Channel Islands for thousands of years. Radiocarbon dating shows that there was a continuous human presence between 8000-11000 years ago. The islands were inhabited primarily by two different Native American groups, the Chumash, and the Tongva/Gabrieleno .The Chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Folger Thorne
Robert F. Thorne (July 13, 1920 – March 24, 2015) was an American botanist. He was taxonomist and curator emeritus at Rancho Santa Ana Botanic Garden and professor emeritus at Claremont Graduate University in Claremont, California. His research has contributed to the understanding of the evolution of flowering plants. Life Thorne was born on July 13, 1920, in Spring Lake, New Jersey. He was educated through high school in Gulfport and St. Petersburg, Florida.Rancho Santa Ana Botanic Garden Library. "Finding Aid for the Robert Folger Thorne Papers 1905-1988" (2009), p. 1. He graduated ''summa cum laude'' in 1941 with a major in botany from Dartmouth College and earned a M.S. degree in economic botany in 1942 at Cornell University.Hamilton, Clement W. "Robert F. Thorne - Recipient of the 2001 Asa Gray Award", ''Systematic Botany''(2002), 27(1): p. 2. He spent about three years serving in the armed forces during World War II, first at Hondo Navigation School, Texas, graduating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epidermis (botany)
The epidermis (from the Greek language, Greek ''ἐπιδερμίς'', meaning "over-skin") is a single layer of cells that covers the leaf, leaves, flowers, roots and Plant stem, stems of plants. It forms a boundary between the plant and the external environment. The epidermis serves several functions: it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients. The epidermis of most leaves shows Anatomical terms of location#Dorsal and ventral, dorsoventral anatomy: the upper (adaxial) and lower (abaxial) surfaces have somewhat different construction and may serve different functions. Woody stems and some other stem structures such as potato tubers produce a secondary covering called the periderm that replaces the epidermis as the protective covering. Description The epidermis is the outermost cell layer of the primary plant body. In some older works the cells of the leaf epidermis have been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
