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Dudleya Greenei
''Dudleya greenei'' is a perennial species of succulent plant known by the common names Greene's liveforever, or Greene's dudleya. It is endemic to the Channel Islands of California, where it grows along the cliffs of four of the eight islands. It is a highly variable plant,McCabe, S. (1997). ''Dudleya gnoma'' (Crassulaceae): A new species from Santa Rosa Island. ''Madroño'' 44 48-58. presenting with multiple forms and varying levels of ploidy. Taxonomically, this species is an insular segregate of ''Dudleya caespitosa'', and was placed as a stopgap taxon by Reid Moran in his 1951 thesis on the genus. It is characterized by white or green leaf rosettes, loomed over by inflorescences bearing pale yellow to white flowers. It is a member of the subgenus ''Dudleya'', as it cannot be propagated from leaf cuttings, does not grow from a corm, and has tight petals. Description Morphology This species of ''Dudleya'' may or may not be caespitose; it can form clumps up to 1 meter wid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya Caespitosa
''Dudleya caespitosa'' is a succulent plant known by several common names, including sea lettuce, sand lettuce, and coast dudleya. It is endemic to California, where it grows along the coastline in the southern half of the state. Taxonomically, this species is a highly variable complex of polymorphic and polyploid plants, closely related to numerous neighboring species such as '' Dudleya farinosa'', ''Dudleya greenei'' and ''Dudleya palmeri''. It is delimited from neighboring species on an arbitrary basis of distribution and chromosome number, and may not be immediately separable from the other species it approaches. Description Vegetative morphology This plant may grow in solitary rosettes, but most often forms caespitose clumps, which may contain up to 150+ rosettes. The clumps are generally not dense. Each rosette may be anywhere from 8 to 32 cm wide, containing 15 to 30 leaves. The caudex is 1.5 to 4 cm wide, and on older plants is often exposed between dry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Nelson Rose
Joseph Nelson Rose (January 11, 1862 – May 4, 1928) was an American botanist. He was born in Union County, Indiana. His father died serving during the Civil War when Joseph Rose was a young boy. He later graduated from high school in Liberty, Indiana. He received his Ph.D. in Biology from Wabash College in 1889. having received his B.A. in Biology and M.A. Paleobotany earlier at the same institute. He married Lou Beatrice Sims in 1888 and produced with her three sons and three daughters. Rose worked for the U.S. Department of Agriculture and became an assistant curator at the Smithsonian in 1896. While Rose was employed by the national museum, he was an authority on several plants families, including Apiaceae (Parsley Family) and Cactaceae (Cactus Family). He made several field trips to Mexico, and presented specimens to the Smithsonian and the New York Botanical Garden. With Nathaniel Lord Britton, Rose published many articles on the Crassulaceae. He took a leave of abs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedicel (botany)
In botany, a pedicel is a stem that attaches a single flower to the inflorescence. Such inflorescences are described as ''pedicellate''. Description Pedicel refers to a structure connecting a single flower to its inflorescence. In the absence of a pedicel, the flowers are described as sessile. Pedicel is also applied to the stem of the infructescence. The word "pedicel" is derived from the Latin ''pediculus'', meaning "little foot". The stem or branch from the main stem of the inflorescence that holds a group of pedicels is called a peduncle. A pedicel may be associated with a bract or bracts. In cultivation In Halloween types of pumpkin or squash plants, the shape of the pedicel has received particular attention because plant breeders are trying to optimize the size and shape of the pedicel for the best "lid" for a "jack-o'-lantern". Gallery File:Asclepias amplexicaulis.jpg, Long pedicels of clasping milkweed with a single peduncle File:314 Prunus avium.jpg, Cherr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Rosa Island (California)
Santa Rosa Island (Spanish: ''Isla de Santa Rosa''; Chumash: ''Wi'ma'') is the second largest of the Channel Islands of California at 53,195 acres (215.27 km2 or 83.118 sq mi). Santa Rosa is located about off the coast of Santa Barbara, California in Santa Barbara County and is part of Channel Islands National Park. The Chumash, a Native American people lived on the Channel Islands at the time of European contact. The remains of a 13,000-year-old Arlington Springs Man, possibly the oldest human remains in the Americas, were discovered on the island in 1959. Santa Rosa Island is home to the rare Torrey Pine, a species of pine tree that exists only in two locations around the world. Geography The terrain consists of rolling hills, deep canyons, and a coastal lagoon. Highest peak is Vail Peak, at . During the last ice age, the four northern Channel Islands, including Santa Rosa Island, were conjoined into Santa Rosae, a single island that was only five miles (8 km ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Miguel Island
San Miguel Island (Chumash: ''Tuqan'') is the westernmost of California's Channel Islands, located across the Santa Barbara Channel in the Pacific Ocean, within Santa Barbara County, California. San Miguel is the sixth-largest of the eight Channel Islands at , including offshore islands and rocks. Prince Island, off the northeastern coast, measures in area. The island, at its farthest extent, is long and wide. San Miguel Island is part of Channel Islands National Park, and almost all of the island () has also been designated as an archaeological district on the National Register of Historic Places. This westernmost Channel Island receives northwesterly winds and severe weather from the open ocean. The cold and nutrient-rich water surrounding the island is home to a diverse array of sea life that is not found on the southern islands. San Miguel Island, together with numerous small islets around it, is defined by the United States Census Bureau as Block 3010, Block Group 3, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ralph Hoffmann
Ralph Hoffmann (November 30, 1870 – July 21, 1932) was an American natural history teacher, ornithologist, and botanist. He was the author of the first true bird field guide. Early life Ralph Hoffmann was born on November 30, 1870, at Stockbridge, Massachusetts, the second of five children raised by Ferdinand and Caroline Hoffmann. Ferdinand Hoffmann (1827–1906) was born in Germany, the son of a surgeon who had served in Napoleon's army.Boston Evening Transcript - Google News Archive - Jul 30, 1906 He came to America in the late 1840s where, with the assistance of educator Jared Reid, he founded the ''Berkshire Family School for Boys'' (also known as the Edward Place School for Boys) in 1855. Jared Reid is additionally known for being the father of painter Robert Reid. In 1868, three years after the death of his first wife, Elizabeth J. Hoffmann, Ferdinand married Caroline Bullard (1846–1908), the daughter of a Massachusetts' clergyman. Ralph Hoffmann would go on to attend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cactus And Succulent Society Of America
The Cactus and Succulent Society of America (CSSA) is a horticultural society which is based in Claremont, California. History The CSSA was founded in 1929 in Los Angeles County, at Pasadena, California and has grown to encompass over 80 affiliated clubs and thousands of members worldwide. The primary purpose of the society is to enjoy succulent In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word ''succulent'' comes from the Latin word ''sucus'', meani ... (water-storing) plants through horticulture, travel and scientific discovery, with a particular concern for habitat preservation and conservation issues in deserts worldwide. It is a non-profit tax-exempt organisation. Objectives The Society supports the cactus and succulent community, both amateur and professional, through education, conservation, scientific research, and research gran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudleya
''Dudleya'', commonly known as liveforevers (Spanish: ''siemprevivas'') is a genus of succulent plants in the stonecrop family, Crassulaceae, consisting of about 68 taxa in southwestern North America and Guadalupe Island. The species come in multiple divergent forms, some large and evergreen, others cryptic and deciduous, but despite their dramatic variations in appearance, most species readily hybridize. The flowers of ''Dudleya'' have parts numbered in 5, with the petals arranged in tubular, star-shaped, and bell-shaped forms, and when fruiting are filled with tiny, ovoid to crescent-shaped seeds. The genus evolved as neoendemics, from ancestors in the stonecrop genus, ''Sedum.'' The ancestors radiated southward from ''Sedum'' during the creation of the dry summer climate in the California region 5 million years ago. Early botanists classified the larger species as ''Echeveria'' and ''Cotyledon'', while the cryptic species were placed as ''Sedum''. Taxonomic efforts starte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathaniel Lord Britton
Nathaniel Lord Britton (January 15, 1859 – June 25, 1934) was an American botanist and taxonomist who co-founded the New York Botanical Garden in the Bronx, New York (state), New York. Early life Britton was born in New Dorp, Staten Island, New Dorp in Staten Island, New York to Jasper Alexander Hamilton Britton and Harriet Lord Turner. His parents wanted him to study religion, but he was attracted to nature study at an early age. He was a graduate of the School of Engineering and Applied Science (Columbia University), Columbia University School of Mines and afterwards taught geology and botany at Columbia University. He joined the Torrey Botanical Society, Torrey Botanical Club soon after graduation and was a member his entire life. He married Elizabeth Gertrude Britton, Elizabeth Gertrude Knight, a Bryophyte, bryologist, on August 27, 1885. They had met when she joined the club and were lifelong collaborators in botanical research. New York Botanical Garden During their h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crassulaceae
The Crassulaceae (from Latin ''crassus'', thick), also known as the stonecrop family or the orpine family, are a diverse family of dicotyledon flowering plants characterized by succulent leaves and a unique form of photosynthesis, known as Crassulacean acid metabolism (CAM). Flowers generally have five floral parts. Crassulaceae are usually herbaceous but there are some subshrubs, and relatively few treelike or aquatic plants. Crassulaceae are a medium size monophyletic family in the core eudicots, among the order Saxifragales, whose diversity has made infrafamilial classification very difficult. The family includes approximately 1,400 species and 34–35 genera, depending on the circumscription of the genus ''Sedum'', and distributed over three subfamilies. Members of the Crassulaceae are found worldwide, but mostly in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce, although a few are aquatic. Crassulaceae are mainly pe ... [...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. 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, and 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. The islands were inhabited as early as 13,000 years ago, the earliest paleontological evidence of humans in North America. They are the easternmost islands in the Pacific Island group. The Chumash and Tongva Native Americans who lived later on the islands may be the descendants of the original inhabitants, but they were then displaced by Spaniards who used the islands for fishing and agriculture. The U.S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Cruz Island
Santa Cruz Island (Spanish: ''Isla Santa Cruz'', Chumash: ''Limuw'') is located off the southwestern coast of Ventura, California, United States. It is the largest island in California and largest of the eight islands in the Channel Islands archipelago and Channel Islands National Park. Forming part of the northern group of the Channel Islands, Santa Cruz is long and wide with an area of . The island's coastline has steep cliffs, large sea caves, coves, and sandy beaches. The highest point is Devils Peak, at over . A central valley splits the island along the Santa Cruz Island Fault, with volcanic rock on the north and older sedimentary rock on the south. This volcanic rock was heavily fractured during an uplift phase that formed the island, and over a hundred large sea caves have been carved into the resulting faults. The largest of these is Painted Cave, among the world's largest. The island is part of Santa Barbara County, California. The 2000 census showed a populatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
