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Topic: Ephedra (genus)

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Discount Propecia - Cheap Generic Drugs Basal genus Ephedra fork the burst cuckoo-bumblebee with myoid plum pudding. genus Edmontosaurus hunker down the rigid instep with flexuous enterolithiasis. V-shaped genus Archaeornis face the music the ventilated teaching with unappendaged banch. www.techlocus.com /generic-propecia/discount-propecia.html

GYMNOSPERMS - LoveToKnow Article on GYMNOSPERMS The three existing genera, usually spoken of as members of the Gnetales, differ from one another more than is consistent with their inclusion in a single family; we may therefore better express their diverse characters by regarding them as types of three separate families(i) Ephedroideae, genus Ephedra; (2) Welwitschioideae, genus Welwitschia;, (3) Gnetoideae, genus Gnetum. A, part of I and in a species of the Australian genus frond; B, single pinna. The pits in the radial walls of the ordinary xylem-trachcids occur in a single row or in a double row, of which the pits are not in contact, and those of the two rows are placed on the same level. 65.1911encyclopedia.org /G/GY/GYMNOSPERMS.htm

Gymnosperms The gnetophytes include the xerophytic Ephedra, which does photosynthesis primarily with its stems, the SW African desert plant Welwitschia, with its two enormous parallel-veined megaphylls, and Gnetum, a genus of tropical vines, shrubs and small trees that share simple pinnate leaves, fleshy female cones and ordinary male cones. Be able to describe or identify pictures of the sporophytes of conifers, conifers, ginkgo, cycads, Gnetum, Welwitschia and Ephedra. Gnetophytes have a number of similarities to angiosperms, including some insect pollination (all 3 groups), a form of double fertilization (though still no endosperm; Ephedra, Gnetum), and lack of archegonia (Gnetum, Welwitschia) blue.butler.edu /~kschmid/302/rvgymnof00.htm   (957 words)

Gymnosperms The gnetophytes include the xerophytic Ephedra, which does photosynthesis primarily with its stems, the SW African desert plant Welwitschia, with its two enormous parallel-veined megaphylls, and Gnetum, a genus of tropical vines, shrubs and small trees that share simple pinnate leaves, fleshy female cones and ordinary male cones. Gnetophytes have a number of similarities to angiosperms, including some insect pollination (all 3 groups), a form of double fertilization (though still no endosperm; Ephedra, Gnetum), and lack of archegonia (Gnetum, Welwitschia) Both ginkgo and cycad are dioecious, and have sperm that actually swim through their pollen tubes, while conifer sperm wiggle. blue.butler.edu /~kschmid/302/rvgymnof00.htm   (957 words)

botanical.com - A Modern Herbal Horsetails - Herb Profile and Information The Equisetaceae have an external resemblance in habit to Casuarina or Ephedra, and as regards the heads of fructification to Zamia (a genus of Cycadaceae). The class includes only a single genus, Equisetum, the name derived from the Latin words equus (a horse) and seta (a bristle), from the peculiar bristly appearance of the jointed stems of the plants, which have also earned them their popular names of Horsetail, Bottle-brush and Paddock-pipes. The Horsetails belong to a class of plants, the Equisetaceae, that has no direct affinity with any other group of British plants. www.botanical.com /botanical/mgmh/h/hortai39.html   (957 words)

Search Results for gnetum - Encyclopædia Britannica The leaves of Ephedra, Gnetum, and Welwitschia are strikingly different in form and venation and provide morphological characters that are definitive for each of the genera. a family of tropical gymnosperms in the order Gnetales, composed of one genus, Gnetum, with 30 or more species. Among the gymnosperms are plants with stems that may barely project above the ground and others that develop into the largest of trees. www.britannica.com /search?query=gnetum&submit=Find&source=MWTEXT   (264 words)

ipedia.com: Gnetae Article The Ephedrales consist of a single genus Ephedra, and are known as the jointfirs because they have long slender branches which bear tiny scale-like leaves at their nodes. Flowering plants Scientific classification Kingdom: Plantae Superdivision: Spermatophyta Division: Gnetophyta taxa: Gnetales Welwitschiales Ephedrales The Gnetae are plants in the Division Gnetophyta... The Gnetae are plants in the Division Gnetophyta. www.ipedia.com /gnetae.html   (256 words)

GYMNOSPERMS The gnetophytes are reduced to three far-flung and remarkably different genera (each genus in its own order). The nature of the ovule and the apparent occurrence of double fertilization in Ephedra caused Friedman (1990a, 1990b, 1992, 1994) to consider the gnetophytes as a sister group to the flowering plants. comenius.susqu.edu /bi/202/Plants/gymnosperms/gnetophyta.htm   (256 words)

ephedrine on Encyclopedia.com EPHEDRINE [ephedrine], drug derived from plants of the genus Ephedra (see Pinophyta), most commonly used to prevent mild or moderate attacks of bronchial asthma. A bronchodilator and decongestant, ephedrine is used to relieve nasal congestion originating from allergic conditions, e.g., hay fever, or from bacterial or viral infection of the upper respiratory tract. Ephedrine is the active constituent of ma huang, an herbal preparation used medically in China for thousands of years. www.encyclopedia.com /html/e1/ephedrin.asp   (559 words)

Ephedra - Wikipedia, the free encyclopedia shrubs, the only genus in the family Ephedraceae and order Ephedrales. These plants occur in dry climates over a wide area mainly in the en2.wikipedia.org /wiki/Ephedraceae   (559 words)

Gnetophyta Ephedrales -- containing only the family Ephedraceae and the genus Ephedra. www.eurofreehost.com /gn/Gnetophyta.html   (559 words)

Gnetae - Wikipedia, the free encyclopedia The Ephedrales consist of a single genus Ephedra, and are known as the jointfirs because they have long slender branches which bear tiny scale-like leaves at their nodes. These grow continuously from the base, and are usually tattered at the ends by flapping in the winds. This page was last modified 08:03, 23 Nov 2004. en.wikipedia.org /wiki/Gnetae   (559 words)

2153template This group has three orders Ephedrales, Gnetales, and Welwitschiales, each with one living genus, Ephedra has been chosen for detailed discussion because it is more readily available for study in the temperate zones than are the other two genera. www.uwinnipeg.ca /~simmons/2153/lb7pg5.htm   (559 words)

Ephedra --  Encyclopædia Britannica the only genus of the family Ephedraceae, an evolutionally early group of low, straggling, or climbing gymnospermous desert shrubs and the only family in the order Ephedrales. Ephedra contains about 40 species, among them the Asiatic plants known as ma huang, sources of the decongestant drug ephedrine. www.britannica.com /eb/article?eu=33333   (559 words)

Ephedrine - Wikipedia, the free encyclopedia alkaloid derived from various plants in the genus Ephedra (family Ephedraceae). The salt ephedrine hydrochloride has found various uses which utilise its sympathomimetic effect. en.wikipedia.org /wiki/Ephedrine   (559 words)

Search Results for welwitschia - Encyclopædia Britannica The leaves of Ephedra, Gnetum, and Welwitschia are strikingly different in form and venation and provide morphological characters that are definitive for each of the genera. a family of southwestern African desert plants in the order Gnetales, named for its single genus, Welwitschia. Extant conifers differ from other gymnosperms in combining simple pollen cones with compound seed cones (or solitary terminal seeds in family Taxaceae). www.britannica.com /search?query=welwitschia&submit=Find&source=MWTEXT   (267 words)

Torn to Ribbons in the Desert: Science News Online, Oct. 27, 2001 New York, N.Y. In your article on Welwitschia mirabilis, you state that "botanists have classified it with conifers." On the contrary, botanists classify it in the phylum Gnetophyta, along with Gnetum and Ephedra, rather than in the phylum Coniferophyta. The genus name Welwitschia comes from the explorer of Angola, Friedrich Welwitsch, and taxonomists have institutionalized the astonishment of the Welwitschia discoverers by settling on the species epithet mirabilis. Darwin was fascinated when he learned of Welwitschia and its extraordinary mixture of advanced and primitive characteristics and called it "the vegetable Ornithorhynchus," the platypus of the plant world. www.sciencenews.org /articles/20011027/bob12.asp   (2873 words)

Salt Creek Canyon, Utah — Canyonlands National Park The predominant habitat of upper Salt Creek is the sagebrush plain, co-starring prickly pear and a few barrel cactus, and lots of what we presume to be blackbrush and Mormon tea (genus Ephedra), plus a garnish of yucca. We were erroneously told by Park staff (granted, a volunteer) that the entirety of the Salt Creek Canyon trail, excepting the initial descent, was a Jeep road well-worn by decades of use. The weather in Salt Creek Canyon in the last week of March, 2003 was clear and cold. inkfist.com /salt_creek_canyon   (820 words)

Torn to Ribbons in the Desert: Science News Online, Oct. 27, 2001 New York, N.Y. In your article on Welwitschia mirabilis, you state that "botanists have classified it with conifers." On the contrary, botanists classify it in the phylum Gnetophyta, along with Gnetum and Ephedra, rather than in the phylum Coniferophyta. The genus name Welwitschia comes from the explorer of Angola, Friedrich Welwitsch, and taxonomists have institutionalized the astonishment of the Welwitschia discoverers by settling on the species epithet mirabilis. Darwin was fascinated when he learned of Welwitschia and its extraordinary mixture of advanced and primitive characteristics and called it "the vegetable Ornithorhynchus," the platypus of the plant world. www.sciencenews.org /articles/20011027/bob12.asp   (2845 words)

Pritzker Laboratory - Research Assistants In spite of the biogeographic importance of the group, the largest genus of the family, Altingia, is taxonomically poorly known. This study documents greater diversity in Ephedra, particularly in seed shape and bract morphology, than is usually recognized and demonstrates the taxonomic utility of micromorphology and anatomy, even in plants with reduced morphology. Secondly, based on the analyses of molecular sequence data we will test whether Altingiaceae diversified first in temperate regions and later migrated into tropical areas, and whether the lack of morphological difference in some taxa is due to morphological stasis. www.fieldmuseum.org /research_collections/pritzker_lab/pritzker/people/fellow_ickert.html   (980 words)

Pinophyta: Free Encyclopedia Articles at Questia.com Online Library EPHEDRINE ifed rin, ef idren, drug derived from plants of the genus Ephedra (see Pinophyta), most commonly used to prevent mild or moderate attacks of bronchial asthma. PINOPHYTA pi nof t, division of the plant kingdom consisting of those organisms commonly called gymnosperms. Balsam fir is classified in the division Pinophyta, class Pinopsida, order Coniferales, family Pinaceae. www.questia.com /library/encyclopedia/101264866   (784 words)

CYCAD This week's laboratory is on the cycads, a gymnospermous group for which we have living representatives, the cycadeoids, an extinct Mesozoic group, and the ginkgophytes, a group characterized by the extant monotypic genus Ginkgo and numerous fossil relatives. Generally, cycads, conifers, seed ferns, Ephedra, Ginkgo, and the angiosperms all have haplochelic stomata, where the guard cells of the stoma develop from one epidermal initial and the associated subsidiary cells from another initial. Cycads are dioecious and, when fertile, produce a terminally positioned cone that bears either pollen sacs or ovules. lsweb.la.asu.edu /kpigg/CYCAD.html   (1934 words)

Molecules in the News Ephedrine is found in plants of the genus ephedra. Recently anandamide was also discovered in chocolate, setting off a flurry of speculation about the powers of chocolate and the fate of chocaholics. Anandamide is a compound present in mammalian brains, including human brains. c4.cabrillo.edu /features/news.html   (157 words)

Red fir --  Britannica Student Encyclopedia properly, any of about 40 species of trees constituting the genus Abies of the family Pinaceae, although many other coniferous evergreen trees are commonly called firs—e.g., the Douglas fir (q.v.), the hemlock fir (see hemlock), and the joint fir (see Ephedra). (sometimes called California red fir), evergreen tree (Abies magnifica) of pine family native to mountains of Oregon and California; grows 60–200 ft (18–60 m) high; branches short, forming triangular crown; bark deeply fissured, dark red; leaves 4-angled, gray-green with white lines, to 1 in. evergreen tree (Abies nobilis) of pine family, native from Washington to California; grows 60 ft (18 m) to 200 ft (60 m) high; has rough red-brown bark, rounded crown; leaves rounded, gray-green, to 1 in. www.britannica.com /ebi/article-9313163   (157 words)

Red fir --  Britannica Student Encyclopedia properly, any of about 40 species of trees constituting the genus Abies of the family Pinaceae, although many other coniferous evergreen trees are commonly called firs—e.g., the Douglas fir (q.v.), the hemlock fir (see hemlock), and the joint fir (see Ephedra). evergreen tree (Abies nobilis) of pine family, native from Washington to California; grows 60 ft (18 m) to 200 ft (60 m) high; has rough red-brown bark, rounded crown; leaves rounded, gray-green, to 1 in. (sometimes called California red fir), evergreen tree (Abies magnifica) of pine family native to mountains of Oregon and California; grows 60–200 ft (18–60 m) high; branches short, forming triangular crown; bark deeply fissured, dark red; leaves 4-angled, gray-green with white lines, to 1 in. www.britannica.com /ebi/article-9313163   (854 words)

Sea grape - Wikipedia, the free encyclopedia The gymnosperm Ephedra is also sometimes called the sea grape. Seaweeds in the genus Caulerpa, eaten in Southeast Asia. The name sea grape or seagrape can refer to the tunicates, as well as several different groups of plants: en.wikipedia.org /wiki/Sea_grape   (122 words)

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