Nettles constitute between 24 and 39 species of flowering plants of the genus Urtica in the family Urticaceae, with a cosmopolitan though mainly temperate distribution. They are mostly herbaceous perennial plants, but some are annual and a few are shrubby. Most of the species have stinging hairs on the stems and leaves.
The most prominent member of the genus is the stinging nettle, Urtica dioica, native to Europe, Africa, Asia, and North America. The genus also contains a number of other species with similar properties, listed below. However, a large number of species included within this genus in the older literature are now recognized as synonyms of Urtica dioica. Some of these taxa are still recognized as subspecies.
Urtica nettles are food for the caterpillars of numerous Lepidoptera (butterflies and moths), such as the tortrix moth Syricoris lacunana and several Nymphalidae.
Vegetative characteristics
Nettle species grow as annuals or perennial herbaceous plants, rarely shrubs. They can reach, depending on the type, location and nutrient status, a height of 10–300 cm. The perennial species have underground rhizomes. The green parts have stinging hairs. Their often quadrangular stems are unbranched or branched, erect, ascending or spreading.
Most leaves and stalks are arranged across opposite sides of the stem . The leaf blades are elliptic, lanceolate, ovate or circular. The leaf blades usually have three to five, rarely up to seven veins. The leaf margin is usually serrate to more or less coarsely toothed. The often-lasting bracts are free or fused to each other. The Cystoliths are extended to more or less rounded.
[edit]Toxicity
Most of the species listed below share the property of having stinging hairs, and might be expected to have similar medicinal uses to the stinging nettle. The stings of Urtica ferox, the ongaonga or tree nettle of New Zealand, have been known to kill horses, dogs and at least one human.
The nature of the toxin secreted by nettles is not settled. The stinging hairs of most nettle species contain formic acid, serotonin and histamine; however recent studies of Urtica thunbergiana implicate oxalic acid and tartaric acid rather than any of those substances, at least in that species.
Monday, December 12, 2011
Medicinal Plants
The goodness and healing properties of herbal plants were explored by people since ages. The study of herbal medicinal plants, known as Ayurveda was practiced in India. Use of plants for medication and treatment dates back to the Vedic period. Today, implementation of traditional methods to treat body ailments has become a profession. This has further boosted its commercial production and the rate of consumption has considerably increased.
List of Medicinal Plants and their Uses
The list of medicinal herbs available across the globe is huge. In the following list we have sorted the species that are commonly used due to their wonderful healing effects and therapeutic value. Have a look at them.
List of Medicinal Herbs and their Uses
A plethora of herbs are also utilized for treatment of health disorders. From the table below you shall come to know their medicinal properties and uses. Such herbal medicines are capable of curing health problems completely.
List of Medicinal Plants and their Uses
The list of medicinal herbs available across the globe is huge. In the following list we have sorted the species that are commonly used due to their wonderful healing effects and therapeutic value. Have a look at them.
Common Name | Scientific Name | Uses |
Acacia | Acacia greggi | astringent, demulcent, emollient |
Agrimony | Agrimonia eupatoria | blood coagulant |
Pimenta | Pimenta dioica | heals wounds, bruises |
Ajwain | Trachyspermum ammi | antibacterial, carminative, digestive |
Ashok | Trachyspermum ammi | relieves menstrual pain, diabetes, uterine disorders |
Amla | Phyllanthus emblica | Cough, diabetes, laxative, acidity |
Ashwagandha | Withania somnifera | relieves stress, nerve disorder, restores normal function of body |
Brahmi | Bacopa monnieri | jaundice, anemia, dropsy |
Bael | Aegle marmelos | constipation, diarrhea, dysentery |
Chirata | Swertia chirata | burn, skin diseases, fever |
Guggul | Commiphora wightii | asthma, hydrocele, diabetes |
Guluchi | Tinospora cordifolia | jaundice, gout, piles, fever |
Kalmegh | Andrographis paniculata | gastritis, fever, weakness |
Makoi | Solanum nigrum | dysentery, diuretic, debility |
Pashan Bheda | Coleus barbatus | calculus, stones in kidney |
Sarpa Gandha | Ranwolfia serpentina | insomnia, hypertension |
Tulsi | Ocimum tenuiflorum | expectorant, cough, cold |
Vai Vidanka | Embelia ribes | skin disease, helminthiasis |
Peppermint | Mentha piperita | pain-killer, digestive |
Vringraj | Eclipta alba | anti-inflammatory, leukemia, stress reliever |
Chitrak | Plumbargo zeylanica | dyspepsia, inflammation, cough, colic |
Harada | Terminalia chebula | leprosy, inflammation, vomiting, insomnia |
Neem | Azadirachta indica | analgesic, astringent, epilepsy |
Kantakari | Solanum xanthocarpum | appetizer, stomach ache, diuretic |
List of Medicinal Herbs and their Uses
A plethora of herbs are also utilized for treatment of health disorders. From the table below you shall come to know their medicinal properties and uses. Such herbal medicines are capable of curing health problems completely.
Common Names | Scientific Names | Uses |
Lemon Balm | Melissa officinalis | digestion, stomach spasms, anti-viral |
Angelica | Angelica sylvestris | gastritis, cramps, digestion |
Chickweed | Stellaria media | itching, irritation, rashes |
Cleavers | Galium aparine | skin diseases, diuretic |
Couch grass | Cynodon dactylon | rheumatism, cystitis, gout |
Dandelion | Taraxacum officinale | dissolves kidney and gallstones, diuretics |
Elderberry | Sambucus canadensis | bronchitis, cold, cough |
Garlic | Allium sativum | anti-microbial, cardiovascular treatment |
Ginger | Zingiber officinale | motion sickness, vomiting, flatulence, diarrhea |
Lavender | Lavandula angustifolia | stress reliever, boosts spirits, stomach disorders |
Red Clover | Trifolium pratense | rejuvenatory, skin nourishing |
Rosemary | Rosmarinus officinalis | improves blood supply to brain |
Thyme | Thymus pulegioides | antifungal, anti-bacterial, expectorant |
Yarrow | Achillea millefolium | wound cleansing, blood coagulation, digestive |
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