الثلاثاء، 10 مايو 2016

Antennaria

Antennaria



Antennaria is a genus of herbaceous perennial plants in the family Asteraceae, native to temperate regions of the Northern Hemisphere, with one species (A. chilensis) in temperate southern South America; the highest species diversity is in North America. Common names include catsfoot or cat's-foot, pussytoes and everlasting.[4][5][6]
Different Antennaria species reach between 10 cm and 50 cm in height. The leaves are basal and often stem leaves. The name Antennaria refers to the projecting stamens seen on the flowers of some species, resemblinginsect antennae.[7]
Antennaria species are used as food plants by the larvae of some Lepidoptera species including Vanessa virginiensis (American painted lady),[8] Coleophora pappiferella (which feeds exclusively on A. dioica), Schinia verna(which feeds on several Antennaria species).

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Angelica

Angelica



Angelica is a genus of about 60 species of tall biennial and perennial herbs in the family Apiaceae, native to temperate and subarctic regions of the Northern Hemisphere, reaching as far north as Iceland and Lapland andGreenland.[1] They grow to 1–3 m (3 ft 3 in–9 ft 10 in) tall, with large bipinnate leaves and large compound umbels of white or greenish-white flowers.
Some species can be found in purple moor and rush pastures.
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Anemone

Anemone



Anemone /əˈnɛməniː/ is a genus of about 120 species of flowering plants in the family Ranunculaceae, native to temperate zones. The genus is closely related to Pulsatilla ('Pasque flower') and Hepatica; some botanists even include both of these genera within Anemone.
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Androsace

Androsace


Androsace (les androsaces) est un genre de petites plantes herbacées de la famille des Primulaceae.
Elles sont vivaces ou annuelles et sont caractérisées par des feuilles en rosettes basales, des fleurs solitaires ou en ombelles simples. Les fleurs sont de couleur blanche ou rosée. Elles poussent essentiellement sur la roche nue en altitude, dans des conditions difficiles. Beaucoup sont des espèces protégées.

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Anchusa

Anchusa



The genus Anchusa belongs to the tribe Boragineae of the borage family (Boraginaceae). It includes about 40 species.
These species grow in Europe, North Africa, South Africa and Western Asia. They are introduced in the USA.
They consist of annual plants, biennial plants and perennial plants with the general characteristics of the borage family. They are generally herbs, covered with bristly hairs. The leaves are simple or undulate, covered with stiff hairs.
The small radially symmetrical flowers are sapphire blue and retain their colour a long time. The plants show numerous flowers with 5 sepals, united at their bases, and 5 petals forming a narrow tube facing upwards. The flowers grow in several axillary cymes, simple or branched, or are clustered at the end. The flowers are much frequented by bees.
The roots of Anchusa (just like those of Alkanna and Lithospermum) contain anchusin (or alkanet-red ), a red-brown resinoid colouring matter. It is insoluble in water, but soluble in alcohol, chloroform and ether.
Anchusa species are used as food plants by the larvae of some Lepidoptera species including Coleophora onosmella.

Taxonomy[edit]

There are four subgenera : Buglossum, Buglossoides, Buglossellum and Anchusa.
The first two form one subclade, the other two each a separate subclade. The subclade of the subgenus Anchusa (containing Anchusa capensis) is largely unresolved.
If we consider Anchusa s.l., then it includes the subgenus Limbata, which diverges markedly in its floral morphology.
The subgenera Buglossum, Buglossellum and Buglossoides clearly need new independent entities, while the subgenus Anchusa needs a narrower concept. This way taxonomy and phylogeny with respect to Anchusa can become completely analogous.
The following genera are synonyms for Anchusa : Buglossum Mill., Hormuzakia Gusul, Lycopsis L. and Phyllocara Gusul.. The genus Anchusella Bigazzi et al. is sometimes included in Anchusa.
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Anaphalis margaritacea

Anaphalis margaritacea


Anaphalis margaritacea, commonly known as the western pearly everlasting[5] or pearly everlasting,[6] is an Asian and North American species of flowering perennial plant in the sunflower family. It is widespread across most of the United States and Canada, as well as northwestern Mexico.[7][8] Asian populations are found in China, the Russian Far East, Japan, Korea, northern Indochina, and the Himalayas.[9] The species is reportedly naturalized in Europe though not native there.
Anaphalis margaritacea grows erect up to about 1.2 meters[10] and has narrow, alternate leaves. One salient feature is that the undersides of the leaves are covered in tiny hairs, giving them a woolly feel and appearance. The stems are dry and brittle. The small whitish to yellowish flower grows in a corymb inflorescence. The inflorescence's most conspicuous part is the numerous white bracts that surround the disc florets.[11]
The plant is dioecious, meaning the pollen-producing (male) and seed-producing (female) flowers are borne on separate plants. It prefers dry, sunny climates, although it is hardy to temperatures well below freezing. The leaves and young plants are edible when cooked.[12]
Varieties and subspecies[4]
  • Anaphalis margaritacea var. cinnamomea (DC.) Herder ex Maxim.
  • Anaphalis margaritacea subsp. japonica (Maxim.) Kitam.
  • Anaphalis margaritacea var. margaritacea
  • Anaphalis margaritacea var. yedoensis (Franch. & Sav.) Ohwi

References[edit]

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Anagallis arvensis

Anagallis arvensis



Le Mouron rouge ou Mouron des champs (Anagallis arvensis, syn. selon la classification phylogénétique APG III (2009) : Lysimachia arvensis) est une plante annuelle de la famille des Primulaceae selon laclassification classique et selon la classification phylogénétique APG III (2009) (mais des Myrsinaceae selon la classification phylogénétique APG (1998) et la classification phylogénétique APG II (2003)).
C'est une plante rampante à fleurs rouges, ou parfois bleues, qui pousse dans les cultures, les jardins... Les fruits sont des Pyxides produisant de nombreuses graines.
Le Mouron rouge n'appartient pas à la même famille que le Mouron des oiseaux (Stellaria media, qui est une Caryophyllaceae). Seule une similitude dans le port de la plante et la forme des feuilles rapproche ces deux espèces.
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