الاثنين، 9 مايو 2016

Alstroemeria

Alstroemeria



Alstroemeria (/ˌælstrᵻˈmɪəriə/),[2] commonly called the Peruvian lily or lily of the Incas, is a genus of flowering plants in the family Alstroemeriaceae. They are all native to South America although some have become naturalized in the United States, Mexico, Australia, New Zealand, Madeira and the Canary Islands.[3][4][1] Almost all of the species are restricted to one of two distinct centers of diversity, one in central Chile, the other in easternBrazil. Species of Alstroemeria from Chile are winter-growing plants while those of Brazil are summer-growing. All are long-lived perennials except A. graminea, a diminutive annual from the Atacama Desert of Chile.
في ليست هناك تعليقات:
التسميات: ,

Alchemilla

Alchemilla



Alchemilla is a genus of herbaceous perennial plants in the family Rosaceae, with the common name "lady's mantle" applied generically as well as specifically to Alchemilla mollis. There are about 300 species, the majoritynative to cool temperate and subarctic regions of Europe and Asia, with a few species native to the mountains of Africa and the Americas.
Most species of Alchemilla are clump-forming or mounded, perennials with basal leaves arising from woody rhizomes. Some species have leaves with lobes that radiate from a common point and others have divided leaves—both are typically fan-shaped with small teeth at the tips. The long-stalked, gray-green to green leaves are often covered with soft hairs, and show a high degree of water-resistance (see Lotus effect). Green to bright chartreuseflowers are small, have no petals and appear in clusters above the foliage in late spring and summer.[5]
في ليست هناك تعليقات:
التسميات: ,

Allium

Allium



Allium is a genus of monocotyledonous flowering plants that includes the cultivated onion, garlic, scallion, shallot and leek as well as chives and hundreds of other wild species.
The generic name Allium is the Latin word for garlic,[3] and Linnaeus first described the genus Allium in 1753. Some sources refer to Greek αλεω (aleo, to avoid) by reason of the smell of garlic.[4] The cooking and consumption of parts of the plants is due to the large variety of flavours and textures of the species. Various Allium have been cultivated from the earliest times and about a dozen species are economically important as crops, or gardenvegetables, and an increasing number of species are important as ornamental plants.[4][5] The inclusion of a species to the genus Allium is taxonomically difficult and species boundaries are unclear. Estimates of the number of species have been as low as 260,[6] and as high as 979.[7] Most authorities accept about 750 species.[8] The type species for the genus is Allium sativum.[9]
Allium species occur in temperate climates of the Northern Hemisphere, except for a few species occurring in Chile (such as A. juncifolium), Brazil (A. sellovianum), and tropical Africa (A. spathaceum). They vary in height between 5 cm and 150 cm. The flowers form an umbel at the top of a leafless stalk. The bulbs vary in size between species, from small (around 2–3 mm in diameter) to rather large (8–10 cm). Some species (such as Welsh onion A. fistulosum) develop thickened leaf-bases rather than forming bulbs as such.
Plants of the Allium genus produce chemical compounds (mostly derived from cysteine sulfoxides) that give them a characteristic (alliaceous) onion or garlic taste and odor.[4] Many are used as food plants, though not all members of the genus are equally flavorous. In most cases, both bulb and leaves are edible and the taste may be strong or weak, depending on the species and on ground sulfur (usually as sulfate) content.[4] In the rare occurrence of sulfur-free growth conditions, all Allium species lose their usual pungency altogether.
In the APG III classification system, Allium is placed in the family Amaryllidaceae, subfamily Allioideae (formerly the family Alliaceae).[10] In some of the older classification systems, Allium was placed in Liliaceae.[4][5][11][12][13]Molecular phylogenetic studies have shown this circumscription of Liliaceae is not monophyletic.
Allium is one of about fifty-seven genera of flowering plants with more than 500 species.[14] It is by far the largest genus in the Amaryllidaceae, and also in the Alliaceae in classification systems in which that family is recognized as separate.[6]
في ليست هناك تعليقات:
التسميات: ,

Ajuga reptans



Ajuga reptans



Ajuga reptans, commonly known as bugle, blue bugle, bugleherb, bugleweed, carpetweed, carpet bungleweed, common bugle, is an herbaceous flowering plant native to Europe. It is invasive in parts of North America. Grown as a garden plant it provides useful groundcover. Numerous cultivars have been selected, of which "Caitlin's Giant" has gained the Royal Horticultural Society's Award of Garden Merit.[1] Ajuga reptans is also a component of Purple moor grass and rush pastures, a Biodiversity Action Plan habitat in the United Kingdom.
Ajuga reptans has dark green leaves with purple highlights. It is a spreading ground cover that grows in a dense mat. The leaves grow 5–8 cm (2.0–3.1 in) high but in the spring it sends up 10–15 cm (3.9–5.9 in) tall flower stalks with many purple flowers on them. The flowers are frequently visited by flies, such as Rhingia campestris.[2]

Contents

  [hide] 
في ليست هناك تعليقات:
التسميات: ,

Ageratum

Ageratum



Ageratum est un genre de la famille des Asteraceae.
Le nom du genre vient du grec α- (privatif) et γηρας, la vieillesse. Les fleurs des agératums durent longtemps ("sans vieillesse").
Cette fleur estivale est considérée comme une annuelle mais se comporte dans son milieu naturel (Mexique) comme une bisannuelle.
في ليست هناك تعليقات:
التسميات: ,

Agave americana

Agave americana



Agave americana, common names centuryplant,[4] maguey, or American aloe,[5] is a species of flowering plant in the family Agavaceae, native to Mexico, and the United States in Arizona and Texas. Today, it is cultivated worldwide as an ornamental plant. It has become naturalized in many regions, including the West Indies, parts of South America, the southern Mediterranean Basin, and parts of Africa, India, China, Thailand, and Australia. [6]
Despite the common name "American aloe", it is not closely related to plants in the genus Aloe.
Blossoms of maguey agave
في ليست هناك تعليقات:
التسميات: ,

Agapanthus



Agapanthus



Agapanthus /ˌæɡəˈpænθəs/[2] is the only genus in the subfamily Agapanthoideae of the flowering plant family Amaryllidaceae.[3] The family is in the monocot order Asparagales. The name is derived from scientific Greek: αγάπη (agape) = love, άνθος (anthos) = flower.
Some species of Agapanthus are commonly known as lily of the Nile (or African lily in the UK), although they are not lilies and all of the species are native to Southern Africa (South Africa, Lesotho, Swaziland, Mozambique) though some have become naturalized in scattered places around the world (Australia, Great Britain, Mexico, Ethiopia, Jamaica, etc.).[1][4]
Species boundaries are not clear in the genus, and in spite of having been intensively studied, the number of species recognized by different authorities varies from 6 to 10. The type species for the genus is Agapanthus africanus.[5] A great many hybrids and cultivars have been produced and they are cultivated throughout warm areas of the world, and can especially be spotted all throughout Northern California.[6] Most of these were described in a book published in 2004.[7]
في ليست هناك تعليقات:
التسميات: ,
الاشتراك في: الرسائل (Atom)