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Orobanche Hederae
''Orobanche hederae'', the ivy broomrape, is, like other members of the genus ''Orobanche'', a parasitic plant without chlorophyll, and thus totally dependent on its host, which is ivy. It grows to , with stems in shades of brown and purple, sometimes yellow. The flowers are long, cream in colour with reddish-purple veins. Etymology ''Orobanche'' is derived from Greek, and means 'bitter vetch strangler'. This name originates from the species '' Orobanche rapum-genistae'', which parasitizes legumes. The name ''hederae'' means 'of ivy', in reference to its host plant, ''Hedera''. Common names in English include ivy broomrape and chokeweed. It is also called ''erva-toira da hera'' in Portuguese and ''orobanche du lierre'' in French. Description Its yellowish to purplish stems are usually strongly swollen at the base and by . They are covered in short soft glandular hairs. Leaves are acute and oblong to lance-shaped. It's calyx (sepals) are with free segments that are entire or u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orobanche
''Orobanche'', commonly known as broomrape, is a genus of over 200 species of small parasitic herbaceous plants, mostly native to the temperate Northern Hemisphere. It is the type genus of the broomrape family Orobanchaceae. Description Broomrapes are generally small, only tall depending on species. They are best recognized by the yellow- to straw-coloured stems completely lacking chlorophyll, bearing yellow, white, or blue snapdragon-like flowers. The flower shoots are scaly, with a dense terminal spike of 10-20 flowers in most species, although single in one-flowered broomrape (''Orobanche uniflora''). The leaves are merely triangular scales. The seeds are minute, tan or brown, blackening with age. These plants generally flower from late winter to late spring. When they are not flowering, no part of the plants is visible above the surface of the soil. Parasitism As they have no chlorophyll, the broomrapes are totally dependent on other plants for nutrients. Broomrape seeds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorophyll
Chlorophyll (also chlorophyl) is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words , ("pale green") and , ("leaf"). Chlorophyll allow plants to absorb energy from light. Chlorophylls absorb light most strongly in the blue portion of the electromagnetic spectrum as well as the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum. Hence chlorophyll-containing tissues appear green because green light, diffusively reflected by structures like cell walls, is less absorbed. Two types of chlorophyll exist in the photosystems of green plants: chlorophyll ''a'' and ''b''. History Chlorophyll was first isolated and named by Joseph Bienaimé Caventou and Pierre Joseph Pelletier in 1817. The presence of magnesium in chlorophyll was discovered in 1906, and was that element's first detection in living tissue. After initial work done by German chemi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hedera
''Hedera'', commonly called ivy (plural ivies), is a genus of 12–15 species of evergreen climbing or ground-creeping woody plants in the family Araliaceae, native to western, central and southern Europe, Macaronesia, northwestern Africa and across central-southern Asia east to Japan and Taiwan. Description On level ground they remain creeping, not exceeding 5–20 cm height, but on suitable surfaces for climbing, including trees, natural rock outcrops or man-made structures such as quarry rock faces or built masonry and wooden structures, they can climb to at least 30 m above the ground. Ivies have two leaf types, with palmately lobed juvenile leaves on creeping and climbing stems and unlobed cordate adult leaves on fertile flowering stems exposed to full sun, usually high in the crowns of trees or the tops of rock faces, from 2 m or more above ground. The juvenile and adult shoots also differ, the former being slender, flexible and scrambling or climbing with small ae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orobanche Rapum-genistae
''Orobanche rapum-genistae'', the greater broomrape, is a plant species in the genus ''Orobanche''. It is a parasitic plant, native to Europe, growing on the roots of plants in the bean family, usually common broom or European gorse. Description The broomrapes are perennial, parasitic plants which contain no chlorophyll and are totally dependent on other plants to provide their nutrients. The greater broomrape can grow to a height of with a honey-brown downy stem, persisting as a dark brown dead spike after flowering. The leaves are represented by small pointed scales, concentrated near the base of the stem, and there is a single bract, which is longer than the flower, below each flower. These have a corolla with two lips, four stamens and a curved-down style. The upper lip is hooded and the lower lip has three lobes, the central one being the largest. The fruits are egg-shaped and enclosed in the dead flowerhead, and the seeds are minute. Distribution and habitat The greater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orobanche Amethystea
''Orobanche'', commonly known as broomrape, is a genus of over 200 species of small parasitic herbaceous plants, mostly native to the temperate Northern Hemisphere. It is the type genus of the broomrape family Orobanchaceae. Description Broomrapes are generally small, only tall depending on species. They are best recognized by the yellow- to straw-coloured stems completely lacking chlorophyll, bearing yellow, white, or blue snapdragon-like flowers. The flower shoots are scaly, with a dense terminal spike of 10-20 flowers in most species, although single in one-flowered broomrape (''Orobanche uniflora''). The leaves are merely triangular scales. The seeds are minute, tan or brown, blackening with age. These plants generally flower from late winter to late spring. When they are not flowering, no part of the plants is visible above the surface of the soil. Parasitism As they have no chlorophyll, the broomrapes are totally dependent on other plants for nutrients. Broomrape seeds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eryngium Campestre
''Eryngium campestre'', known as field eryngo, or Watling Street thistle, is a species of '' Eryngium'', which is used medicinally. A member of the family Apiaceae, eryngo is a hairless, thorny perennial plant. The leaves are tough and stiff, whitish-green. The basal leaves are long-stalked, pinnate and spiny. The leaves of this plant are mined by the gall fly, ''Euleia heraclei''. Description ''Eryngium campestre'' is a stiff, hairless, prickly perennial plant. It resembles the better known sea holly (''Eryngium maritimum''), but is taller and less robust, and the stem and leaves are paler and not bluish-green. The palmate leaves have more slender lobes which are tipped with spines, and the bracts below the flower heads are slender. The stems are thinner, the branches are longer and the globular flower heads are white and much smaller than the sea holly. This plant flowers between July and September. Distribution and habitat ''Eryngium campestre'' has a mainly Central and So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apiales
The Apiales are an order of flowering plants. The families are those recognized in the APG III system. This is typical of the newer classifications, though there is some slight variation and in particular, the Torriceliaceae may also be divided. Under this definition, well-known members include carrots, celery, parsley, and ''Hedera helix'' (English ivy). The order Apiales is placed within the asterid group of eudicots as circumscribed by the APG III system. Within the asterids, Apiales belongs to an unranked group called the campanulids, and within the campanulids, it belongs to a clade known in phylogenetic nomenclature as Apiidae. In 2010, a subclade of Apiidae named Dipsapiidae was defined to consist of the three orders: Apiales, Paracryphiales, and Dipsacales. Taxonomy Under the Cronquist system, only the Apiaceae and Araliaceae were included here, and the restricted order was placed among the rosids rather than the asterids. The Pittosporaceae were placed within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedanius Dioscorides
Pedanius Dioscorides ( grc-gre, Πεδάνιος Διοσκουρίδης, ; 40–90 AD), “the father of pharmacognosy”, was a Greek physician, pharmacologist, botanist, and author of ''De materia medica'' (, On Medical Material) —a 5-volume Greek encyclopedia about herbal medicine and related medicinal substances (a pharmacopeia), that was widely read for more than 1,500 years. For almost two millennia Dioscorides was regarded as the most prominent writer on plants and plant drugs. Life A native of Anazarbus, Cilicia, Asia Minor, Dioscorides likely studied medicine nearby at the school in Tarsus, Mersin, Tarsus, which had a pharmacological emphasis, and he dedicated his medical books to Laecanius Arius, a medical practitioner there. Though he writes he lived a "soldier's life" or "soldier-like life", his pharmacopeia refers almost solely to plants found in the Greek-speaking eastern Mediterranean, making it likely that he served in campaigns, or travelled in a civilian ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
