DIGERA ARVENSIS PDF

Gosida Please donate to Arkive Help us share the wonders of the natural world. Digera muricata Filed as Digera muricata L. Rodents of Unusual Size. Flora of Tropical East Africa.

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Description[ edit ] When found as a summer annual, the scarlet pimpernel has a low-growing creeping habit, but as a winter annual, it forms a half- rosette with an upright stem. They bear bright green, soft, ovate sessile leaves in opposite pairs. The orange, red or blue, radially symmetric flowers , about 10—15 millimetres 0. The petal margins are somewhat crenate and have small glandular hairs. The stamens have lollipop hairs and therefore attract a variety of pollinators , especially flies , but the flowers are also capable of autopollination.

The dehiscent capsule fruits ripen from August to October in the northern hemisphere. The weight of the fruiting body bends the stem, and the seeds are transported by the wind or rain.

Blue-flowered plants A. In , a molecular phylogenetic study showed that Anagallis foemina is more closely related to Anagallis monelli than to Anagallis arvensis, and should be treated as a separate species. It has recently started to occur along the verges of salted roads, creating a broad red band along the roadside. The petals of the type arvensis are bright red to minium -coloured; carnea is deep peach , lilacina is lilac ; pallida is white; and azurea is blue.

The blue form can be difficult to distinguish from A. The glandular hairs on the petal margins, at least 50 in this example, are clearly visible in the enlarged photo. Medical and agricultural significance[ edit ] Anagallis arvensis is generally unwelcome as a cosmopolitan invasive species ; it is harmfully toxic in several respects and accordingly undesirable in pastures.

Perhaps fortunately, the plant is acrid and bitter, and grazing livestock generally avoid eating it except in conditions of overgrazing or grazing of unsatisfying stubble. Experimental feeding of the plant material to various animals, such as horses and dogs, caused gastroenteritis. In various countries however, the plant material has been applied externally to slow-healing ulcers and wounds.

It also has been applied as an expectorant and as a remedy for pruritus , rheumatism , haemorrhoids , rabies , leprosy , and snake-bite. Anagallis has been used in treatment of non-specified types of phthisis , and of kidney-related conditions such as dropsy and chronic nephritis. It was used as an antidepressant in ancient Greece , and to treat various mental disorders in European folk medicine, leading to the German name Gauchheil Gauch meaning "fool" or "cuckoo", and heil meaning "heal".

Generally however, documented evidence for clinical efficacy is lacking. Anagallis arvensis is traditionally known by pharmacists as Arvensis Herba [16] Anagallis arvensis is insecticidal, or at least is repellent to some insects, possibly by virtue of its pungent essential oil which has a characteristic smell.

Taken by mouth, experimental doses of the liquid in humans caused twenty-four hours of intense nausea, headache and bodily pain. Some people also experience dermatitis from contact with the leaf. Reports from Australia state that when grain crops have been infested by the weed, chaff that contains much of the material becomes unpalatable to stock as fodder.

When grazing in pasture, livestock usually leave the plant alone, but when they do nonetheless eat significant quantities, they suffer diuretic and narcotic effects sufficiently intense to justify regarding the plant as poisonous. Antibacterial tests of the green parts failed to show any encouraging positive effect.

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