|
Holmgrenanthe
''Holmgrenanthe petrophila'' (rocklady, formerly ''Maurandya petrophila'') is a rare perennial desert plant in the plantain family (Plantaginaceae), and the sole species of the genus ''Holmgrenanthe''. It forms low mats of branched stems growing from a woody base. The leaves have small spines along their edges. The solitary yellow flowers are tubular with five free lobes at the end, the upper two pointing backwards, the lower three projecting forwards. The species is known only from about ten locations, most in the Titus Canyon and the adjacent Fall Canyon, all within the Californian section of Death Valley National Park. It grows in limestone crevices on the canyon walls, often on the north face. Description ''Holmgrenanthe petrophila'' is an herbaceous perennial with fibrous roots. It is low growing with slender, branched stems arising from a woody base; as it often grows on vertical faces, the stems tend to hang down. Close relatives climb using twining leaf stalks ( petiole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mabrya
''Mabrya'' is a genus of flowering plants in the plantain family, Plantaginaceae. It consists of herbaceous perennials with brittle upright or drooping stems, found in dry areas of Mexico and the southern United States. Description Species of ''Mabrya'' are herbaceous perennials with fibrous roots. They have brittle stems, usually pendant and forming mats, although more upright in ''M. erecta''. The stems branch and become woody at the base with age. Unlike related genera, such as ''Maurandya'' and ''Lophospermum'', the leaf stalks ( petioles) are straight and do not twine. The leaves are rounded or kidney shaped, generally with broad, somewhat rounded teeth. The flowers are borne individually on stalks ( peduncles) that are usually horizontal or ascending. The sepals are joined at the base; where their margins become free, they curve back on themselves. Together the sepals form an urn-shaped calyx. The flowers consist of five petals joined at the base to form a tube. The f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asarina
''Asarina'' is a flowering plant genus of only one species, ''Asarina procumbens Mill.'' Search for "Asarina", the trailing snapdragon, which is native to France and Spain and introduced in Germany, Switzerland, Austria and Hungary. Originally placed in the Scrophulariaceae (figwort family), the genus has more recently been moved to the Plantaginaceae (plantain family). Species from North America formerly placed in the genus ''Asarina'' are now placed in '' Holmgrenanthe'', ''Lophospermum'', '' Mabrya'' and ''Maurandya'', as well as '' Neogaerrhinum''. ''Asarina'' is now regarded as exclusively an Old World genus. Description The single remaining species of the now monotypic genus, ''A. procumbens'' is a foetid, strongly pubescent, viscid subshrub of trailing/mat-forming habit reaching a height of only 10-20cm. The somewhat woody main stems give rise to lax creeping/cascading stems bearing opposite, long-petioled, hairy, lobed, reniform-to-cordate leaves with crenate and often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurandya
''Maurandya'' is a genus of flowering plants in the family Plantaginaceae, native to Mexico and the south west United States (from California to central Texas). They sprawl or climb by means of twining leaf stalks. One of the four species, ''Maurandya barclayana'', is widely cultivated as an ornamental plant. The generic name is often misspelt as ''Maurandia''. Two of its species have at times been placed in the genera ''Epixiphium'' and ''Maurandella''. Description The species of ''Maurandya'' are either Herbaceous plant, herbaceous Perennial plant, perennials with fibrous roots or, in the case of ''Maurandya wislizeni, M. wislizeni'', an Annual plant, annual with a tap root. All are sprawlers or climbers, climbing by means of twining leaf stalks (Petiole (botany), petioles). The leaves are shaped like broad or narrow arrowheads, more rarely heart-shaped. The flower stalks (Peduncle (botany), peduncles) grow upwards and bear solitary flowers. The more-or-less triangular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plantaginaceae
Plantaginaceae, the plantain family, is a large, diverse family of flowering plants in the order Lamiales that includes common flowers such as snapdragon and foxglove. It is unrelated to the banana-like fruit also called "plantain." In older classifications, Plantaginaceae was the only family of the order Plantaginales, but numerous phylogenetic studies, summarized by the Angiosperm Phylogeny Group, have demonstrated that this taxon should be included within Lamiales. Overview The plantain family as traditionally circumscribed consisted of only three genera: ''Bougueria'', ''Littorella'', and ''Plantago''. However phylogenetic research has indicated that Plantaginaceae ''sensu stricto'' (in the strict sense) were nested within Scrophulariaceae (but forming a group that did not include the type genus of that family, ''Scrophularia''). Although Veronicaceae (1782) is the oldest family name for this group, Plantaginaceae (1789) is a conserved name under the International Code of B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Death Valley National Park
Death Valley National Park is an American national park that straddles the California–Nevada border, east of the Sierra Nevada. The park boundaries include Death Valley, the northern section of Panamint Valley, the southern section of Eureka Valley and most of Saline Valley. The park occupies an interface zone between the arid Great Basin and Mojave deserts, protecting the northwest corner of the Mojave Desert and its diverse environment of salt-flats, sand dunes, badlands, valleys, canyons and mountains. Death Valley is the largest national park in the contiguous United States, as well as the hottest, driest and lowest of all the national parks in the United States. It contains Badwater Basin, the second-lowest point in the Western Hemisphere and lowest in North America at below sea level. More than 93% of the park is a designated wilderness area. The park is home to many species of plants and animals that have adapted to this harsh desert environment including creosote bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodochiton
''Rhodochiton'' is a genus of flowering plants within the family Plantaginaceae, native to southern Mexico and neighbouring Guatemala. They climb by means of twining leaf stalks. One of the three species, '' Rhodochiton atrosanguineus'', the purple bell vine, is grown as an ornamental plant. All three species are sometimes included in ''Lophospermum''. Description ''Rhodochiton'' species are herbaceous perennials. They have long climbing or sprawling stems, branching and becoming woody at the base with age. They cling by means of twining leaf stalks ( petioles). Their leaves are more or less heart-shaped, with pointed ends. The solitary flowers are carried on relatively long stalks ( peduncles) that are pendant, causing the flowers to hang downwards. The sepals, usually tinted rose or purple, are joined at the base and together form an expanded bell shape around the flower. The five petals are joined at the base to form a tube, light purple at the base and dark purple towards t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lophospermum
''Lophospermum'' is a genus of herbaceous perennial climbers or scramblers, native to mountainous regions of Mexico and Guatemala. Those that climb use twining leaf stalks. Their flowers are tubular, in shades of red, violet and purple, the larger flowers being pollinated by hummingbirds. Now placed in the greatly expanded family Plantaginaceae, the genus was traditionally placed in the Scrophulariaceae. The close relationship with some other genera, particularly ''Maurandya'' and '' Rhodochiton'', has led to confusion over the names of some species. '' Lophospermum erubescens'' and '' Lophospermum scandens'' are cultivated as ornamental plants, as climbers or trailers. Various ''Lophospermum'' cultivars are grown, often under trade names such as "Lofos®". Description ''Lophospermum'' species are herbaceous perennial climbers with fibrous roots. They climb by means of twining leaf stalks ( petioles) rather than tendrils or twining stems. The long stems are branched, becoming wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick Vernon Coville
Frederick Vernon Coville (March 23, 1867 – January 9, 1937) was an American botanist who participated in the Death Valley Expedition (1890-1891), was honorary curator of the United States National Herbarium (1893-1937), worked at then was Chief botanist of the United States Department of Agriculture (USDA), and was the first director of the United States National Arboretum. He made contribution to economic botany and helped shape American scientific policy of the time on plant and exploration research. Biography Coville was born in 1867 in Preston, New York to bank director Joseph Addison Coville and his wife Lydia. He went to Cornell University, where he graduated with a Bachelor of Arts in 1887. He briefly taught botany before joining the USDA and participating to the Geological Survey of Arkansas as assistant botanist in 1888. He would remain with the department until his death, succeeding to George Vasey as Chief botanist in 1893, a title accompanied with that of Honorar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''sporangium, microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in ''Canna (plant), Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Native Plant Society
The California Native Plant Society (CNPS) is a California environmental non-profit organization (501(c)3) that seeks to increase understanding of California's native flora and to preserve it for future generations. The mission of CNPS is to conserve California native plants and their natural habitats, and increase understanding, appreciation, and horticultural use of native plants throughout the entire state and California Floristic Province. History California Native Plant Society was founded in 1965 by professional botanists and grassroots activists who, after saving an important native plant garden in Berkeley's Tilden Regional Park, were inspired to create an ongoing organization with the mission to save and promote the native plants of California. Structure For 50 years, professional CNPS staff and volunteers have worked alongside scientists, government officials, and regional planners to protect habitats and species, and to advocate for well-informed environmental practic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Creosote Bush Scrub
Creosote bush scrub is a North American desert vegetation type (or biome) of sparsely but evenly spaced desert plants dominated by creosote bush (''Larrea tridentata'') and its associates. Its visual characterization is of widely spaced shrubs that are somewhat evenly distributed over flat or relatively flat desert areas that receive between 2 and 8 inches of rain each year. It covers the majority of the flat desert floor and relatively flat alluvial fans in the Mojave Desert, Chihuahuan Desert, and Sonoran Desert. The dominant plants that typify this vegetation type are creosote bush (''Larrea tridentata'') and its associates, white bur-sage (''Ambrosia dumosa''), brittlebush (''Encelia farinosa'', ''Encelia actoni'', ''Encelia virginensis''), cheese-bush (''Ambrosia salsola''), Mojave yucca (''Yucca schidigera''), silver cholla cactus (''Cylindropuntia echinocarpa''), and beavertail cactus (''Opuntia basilaris ''Opuntia basilaris'', the beavertail cactus or beavertail pricklype ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Death Valley
Death Valley is a desert valley in Eastern California, in the northern Mojave Desert, bordering the Great Basin Desert. During summer, it is the Highest temperature recorded on Earth, hottest place on Earth. Death Valley's Badwater Basin is the point of lowest elevation in North America, at below sea level. It is east-southeast of Mount Whitney — the highest point in the contiguous United States, with an elevation of 14,505 feet (4,421 m). On the afternoon of July10, 1913, the National Weather Service, United States Weather Bureau recorded a high temperature of 134 °F (56.7 °C) at Furnace Creek, California, Furnace Creek in Death Valley, which stands as the Highest temperature recorded on Earth, highest ambient air temperature ever recorded on the surface of the Earth. This reading, however, and several others taken in that period are disputed by some modern experts. Lying mostly in Inyo County, California, near the border of California and Nevada, in the Great ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
