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Dudleya Edulis
''Dudleya edulis'' is a species of perennial succulent plant known by the common names fingertips, lady fingers, mission lettuce and the San Diego dudleya. The common name denotes the finger-like shape of the leaves, while the specific epithet ''edulis'' refers to the use of the young scapes as food by the Kumeyaay. It is native to Southern California and northern Baja California, and grows on rocky hillsides, cliffs, and bare rock. Description ''Dudleya edulis'' is made up of an array of fleshy, finger-like leaves growing vertically from a caudex at or just below ground level. The fingerlike leaves are pale green, cylindrical and pointed, growing up to tall.Jepson Flora Project (ed.)''Dudleya edulis''Jepson eFlora The Jepson Herbarium, University of California, Berkeley. It bears a branching inflorescence tall, with several terminal branches each bearing up to 10 or 11 flowers. The flowers have pointed white to cream petals about a centimeter long. The bloom period is M ... [...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] |
Echeveria
''Echeveria'' is a large genus of flowering plants in the family Crassulaceae, native to semi-desert areas of Central America, Mexico and northwestern South America. Description Plants may be evergreen or deciduous. Flowers on short stalks (cymes) arise from compact rosettes of succulent fleshy, often brightly coloured leaves. Species are polycarpic, meaning that they may flower and set seed many times over the course of their lifetimes. Often numerous offsets are produced, and are commonly known as "hen and chicks", which can also refer to other genera, such as ''Sempervivum'', that are significantly different from ''Echeveria''. Many species of ''Echeveria'' serve important environmental roles, such as those of host plants for butterflies. For example, the butterfly ''Callophrys xami'' uses several species of ''Echeveria'', such as ''Echevelia gibbiflora'', for suitable host plants. Even more, these plants are integral to the oviposition process of ''C. xami'' and some other b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuyamaca Peak
Cuyamaca Peak is a mountain peak of the Cuyamaca Mountains range, in San Diego County, Southern California. Geography At , its summit is the second highest point in San Diego County. Cuyamaca Peak is located roughly from the Pacific Ocean, within Cuyamaca Rancho State Park. It is east of the city of San Diego and southwest of Julian. A popular year round hike to the summit of Cuyamaca leads from the Paso Picacho Campground, starting at about . Ecology Snows in winter are common above and surrounding regions in Cuyamaca Rancho State Park. During summer, Bracken Ferns, a variety of wildflowers and native bunchgrasses dominate mountain meadows and the forest floor. Prior to the Cedar Fire, Black oaks once lit up the mountain. Cedar Fire In October 2003, the Cedar Fire burned the once abundant White Fir (''Abies concolor''), Incense Cedar (''Calocedrus decurrens''), Jeffrey Pine, Coulter Pine, Sugar Pine, and Black oak (''Quercus kelloggii'') that once lined the mountain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaparral
Chaparral ( ) is a shrubland plant community and geographical feature found primarily in the U.S. state of California, in southern Oregon, and in the northern portion of the Baja California Peninsula in Mexico. It is shaped by a Mediterranean climate (mild wet winters and hot dry summers) and infrequent, high-intensity crown fires. Chaparral features summer-drought-tolerant plants with 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 within the chaparral biome. Three other closely related chaparral shrubland systems occur in central Arizona, western Texas, and along the eastern side of central Mexico's mountain chains (mexical), all having summer rains in contrast to the Mediterranean climate of other chaparral formations. Chaparral comprises 9% of California's wildland vegetation and contains 20% of its plant species. The name comes from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backcrossing
Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, to achieve offspring with a genetic identity closer to that of the parent. It is used in horticulture, animal breeding, and production of gene knockout organisms. Backcrossed hybrids are sometimes described with acronym "BC"; for example, an F1 hybrid crossed with one of its parents (or a genetically similar individual) can be termed a BC1 hybrid, and a further cross of the BC1 hybrid to the same parent (or a genetically similar individual) produces a BC2 hybrid. Plants Advantages * If the recurrent parent is an elite genotype, at the end of the backcrossing programme, an elite genotype is recovered. * As no "new" recombination results, the elite combination is not lost. Disadvantages * It works poorly for quantitative traits. * It is more restricted for recessive traits. * In practice, sections of genome from the nonrecurrent parents are often still present and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya Blochmaniae
''Dudleya blochmaniae'' is a summer-deciduous succulent plant known by the common names Blochman's liveforever or Blochman's dudleya. This species of ''Dudleya'' survives part of the year with no aboveground presence, surviving as underground corm-like roots in deciduous months. It is characterized by white, Star polygon, star-shaped and spreading flowers that emerge after sufficient rainfall. It is found along the Pacific coast of the California Floristic Province, from the vicinity of San Luis Obispo County, California, San Luis Obispo in California to Punta Colonet in Baja California. Description Vegetative morphology This plant forms a basal Rosette (botany), rosette from an underground corm. The small rosette is around only 0.5 to 7 cm, and the Leaf, leaves are summer deciduous. The leaves are 1 to 6 cm long, more or less Glossary of leaf morphology, shaped, oblanceolate to club-shaped, and when removed from the plant, the point of detachment will turn red with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya Formosa
''Dudleya formosa'', known by the common name La Misión liveforever, is a species of perennial succulent plant endemic to the Guadalupe Valley in Baja California. It is characterized by bright green leaves, red floral stems, and pink flowers. Description Morphology ''Dudleya formosa'' has a trailing caudex, 0.5 to 2.5 cm thick, becoming over 5 decimeters (dm) long, branching to form a loose, prostrate mound that can reach up to several hundred rosettes. Rosettes are flattish, 4 to 13 cm in diameter with around 10 to 20 leaves. Leaves are oblong to oblong- obovate, acute to obtuse with a sharp tip 0.5 mm long. Foliage is a bright green, and like other ''Dudleya'' the leaves are tinged with a red hue at the tips and margins. Leaves are not glaucous. Measurements of the leaves put them at 2 to 8 cm long, 1 to 3 cm wide, and 3 to 6 mm thick. Delving further into ''D. formosa'''s leaf morphology, leaves are convex below ( ventrally), and flat above ( dorsally). Leaf margins are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya Brevifolia
''Dudleya brevifolia'', is a rare succulent plant known by the common name short-leaved liveforever, short-leaved dudleya or rarely the Del Mar Hasseanthus. It is an edaphic endemic that only grows on the mesas of the most ancient marine terraces, hiding in the vicinity of ironstone concretions. The leaves are deciduous, and disappear after the inflorescence develops. The small white flowers are star-shaped with a yellow center. After flowering, any above ground trace of the plant will disappear, and it survives under the earth with a starch-rich subterranean caudex. ''Dudleya brevifolia'' is only found on coastal mesas along a small strip of coast in San Diego County, California. It was formerly a subspecies of the similar '' Dudleya blochmaniae'', and was not recognized as a distinct species because both plants grew and hybridized together. However, the habitats with the intermediate populations were razed for residential development, and with these populations destroyed, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya Stolonifera
''Dudleya stolonifera'' is a succulent plant known by the common name Laguna Beach liveforever or Laguna Beach dudleya. This is a rare plant which is endemic to the coastline of Orange County, California. It is known from only about six populations in the vicinity of Laguna Beach, totaling about 30,000 individuals.USFWS''Dudleya stolonifera'' Five-year Review.April 16, 2010. It is federally listed as a threatened species of the United States. Description This '' Dudleya'' grows from an unbranched caudex stem and is unusual among related plants in that it has stolons from which it sprouts vegetatively. Other species of ''Dudleya'' only grow solitary or produce dichotomous branches, unless their terminal meristems are damaged. This species produces a small rosette of pointed reddish-green leaves and erects a short peduncle topped with an inflorescence of bright yellow flowers. Morphology This species grows one to several rosettes on a caudex, with new rosettes emerging fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya Attenuata
''Dudleya attenuata'' is a species of Perennial plant, perennial succulent plant known by the common name taper-tip liveforever, native to Baja California and a small portion of California. A Rosette (botany), rosette-forming leaf succulent, it has narrow pencil shaped leaves that can often be found covered in a white Epicuticular wax, epicuticular wax. The thin, sprawling stems branch to form the clusters of rosettes, with plants creating a "clump" up to 40 cm wide. The small flowers are white or yellow, with 5 spreading petals. It is a diverse, variable species that extends from the southernmost coast of San Diego County, California, San Diego County to an area slightly north of the El Vizcaíno Biosphere Reserve, Vizcaino Desert, hybridizing with many other species of ''Dudleya'' in its range. Some plants with white or pinkish flowers were referred to as Orcutt's liveforever, referring to a former subspecies split on the basis of the flower color. Description Because thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Willis Linn Jepson
Willis Linn Jepson (August 19, 1867 – November 7, 1946) was an early California botanist, conservationist, and writer. Career Born at Little Oak Ranch near Vacaville, California, Jepson became interested in botany as a boy and explored the adjacent San Francisco Bay Area. He came in contact with various botanists before he entered college. In 1892, at the age of 25, Jepson, John Muir, and Warren Olney formed the Sierra Club, in Olney's San Francisco law office. From 1895 to 1898, Jepson served as instructor in Botany and carried on research at the University of California, Berkeley, Cornell University (1895), and Harvard University (1896–1897). He received his Ph.D. at Berkeley in 1899. He was made assistant professor in 1899, associate professor in 1911, professor in 1918, and professor emeritus in 1937. He was a Professor of Botany at UC Berkeley for four decades, thus his entire career was identified with the University of California. Jepson founded the Californi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reid Venable Moran
Reid Venable Moran (June 30, 1916 – January 21, 2010) was an American botanist and the curator of botany at the San Diego Natural History Museum from 1957 to 1982. Moran was the world authority on the Crassulaceae, a family of succulent plants, and in particular the genus ''Dudleya'', the subject of his Ph.D. dissertation. He named at least 18 plants new to science — some in that family and some not — and published many papers elucidating relationships within the Crassulaceae. As a mark of the respect he earned among his peers, more than a dozen plants have been named for him. Jane Goodall described Moran as "a sort of living myth in botanical exploration in Baja California and the Pacific Islands of Mexico," citing specifically his analysis of the environmental impact of introduced species (especially goats) on the flora of Guadalupe Island. Biography Born in Los Angeles, California on June 30, 1916 to Edna Louise Venable and Robert Breck Moran (a petroleum geologist), Mora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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