mardi 17 juin 2008

Centaurium

Centaurea vanensis

Centaurium (formerly Erythraea) is a genus containing about 50 species in the gentian family (Gentianaceae), tribe Chironieae, subtribe Chironiinae. The genus was named after the centaurChiron, famed in Greek mythology for his skill in medicinal herbs. The common name for plants in this genus is Centaury.


Centaurea tchihateffii
This genus is primarily distributed in the Mediterranean. However, species such as Centaurium littorale are widespread, but not common, between the northern Mediterranean and Scandinavia.

Centaurea nigrifilbria

This genus is primarily distributed in the Mediterranean. However, species such as Centaurium littorale are widespread, but not common, between the northern Mediterranean and Scandinavia.
Plants in the genus contain bitter principles, and are sometimes used medicinally as a stomachictonic. and tonic.
Centaurium eryhraea


Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Gentianales
Family: Gentianaceae

lundi 3 décembre 2007

Cardamine raphanifolia

Cardamine (Car-dá-mi-ne, Bittercress or Bitter-cress), is a large genus in the family Brassicaceae. It contains more than 150 species of annuals and perennials. The genus grows worldwide in diverse habitats, except in the Antarctic. Genus Dentaria is a synonym for Cardamine.

The leaves can have different forms, going from minute to medium-sized. They can be pinnate or bipinnate. They are basal and cauline (growing on the upper part of the stem), with narrow tips. They are rosulate (forming a rosette). The blade margins can be entire, serrate or dentate. The stem internodes lack firmness.

The radially symmetrical flowers grow in a racemose many-flowered inflorescence or in corymbs. The white, pink or purple flowers are minute to medium-sized. The petals are longer than the sepals. The fertile flowers are hermaphroditic.

The fruits are long, thin pods with many (20-100) seeds.

Some plants were reputed to have medicinal qualities (treatment of heart or stomach ailments).

The name Cardamine is derived from the Greek word kardamon, referring to a Persian or Indian herb with pungent leaves.

Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Brassicales
Family: Brassicaceae
Genus: Cardamine L.

Campanula



Campanula aucheri



Campanula (Cam-pá-nu-la) is one of several genera of in the family Campanulaceae with the common name bellflower. It takes its name from their bell-shaped flowers, and campanula is Latin for "little bell".

The genus includes about 300 species and several subspecies, distributed across the temperate regions of the Northern Hemisphere, with the highest diversity in the Mediterranean region east to the Caucasus.

The species include annual, biennial and perennial plants, and vary in habit from dwarf arctic and alpine species under 5 cm high, to large temperate grassland and woodland species growing to 2 m tall.

The leaves are alternate, sessile, and often vary in shape on a single plant, with larger, broader leaves at the base of the stem and smaller, narrower leaves higher up; the leaf margin may be either entire or serrated (sometimes both on the same plant). Many species contain white latexcorolla, typically large (2-5 cm or more long), mostly blue to purple, sometimes white or pink. The fruit is a capsule containing numerous small seeds. in the leaves and stems. The flowers are produced in panicles (sometimes solitary), and have a bell-shaped, five-lobed

Well-known species include the northern European Campanula rotundifolia, commonly known as Harebell in England and Bluebell in Scotland, and the southern European Campanula medium, commonly known as Canterbury Bells, which is a cultivated garden plant in the United Kingdom. As well as several species occurring naturally in the wild in northern Europe, there are many cultivated garden species. The species Campanula rapunculus, commonly known as Rampion Bellflower, Rampion, or Rover Bellflower, is an annual vegetable and a popular gardenplant, though sometimes considered too invasive. There are blue, purple and white varieties. The Brothers Grimm's tale Rapunzel gave its name to this plant.

Campanula species are used as food plants by the larvae of some Lepidoptera species including Common Pug (recorded on Harebell), Dot Moth, Ingrailed Clay (recorded on Harebell), Lime-speck Pug and Mouse Moth.

Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Asterales
Family: Campanulaceae
Genus: Campanula

Butomus umbellatus


The flowering rush (Butomus umbellatus), also known as grass rush, is a perennial aquatic plant, constituting the family Butomaceae. Its name is derived from Greek bous, meaning "cow", "ox" etc and tome, a cut (the verb 'temnein' meaning "to cut"), which refers to the plant's swordlike leaves.

Other than suggested by its English common name, it is not a true rush. It is native to Eurasia and grows on the margins of still and slowly moving water down to a depth of about 3 m. It has pink flowers. Introduced into North America as an ornamental plant it has now become a serious invasive weed in the Great Lakes area.

Butomus is a rhizamatous perennial with linear leaves up to 1 metre long, or more. The leaves are triangular in cross-section and arise in two rows along the rhizome.

The inflorescence is umbel-like consisting of a single terminal flower surrounded by three cymes. The flowers are regular and bisexual. There are three petal-like sepals which are pink with darker veins. They persist in the fruit. The three petals are like the sepals but somewhat larger. 6 - 9 stamens. Carpels superior, 6 - 9 and slightly united at the base. When ripe they are obovoid and crowned with a persistent style. Ovules are numerous and found scattered over the inner surface of the carpel wall, except on the midrib and edges. Fruit is a follicle. The seeds have no endosperm and a straight embryo.

Uses

Frequently cultivated as an attractive ornamental plant. In parts of Russia the rhizomes are used as food.

Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Alismatales
Family: Butomaceae
Genus: Butomus
Species: B. umbellatus


samedi 1 décembre 2007

Aubrietta olympica


Kingdom: Plantae
Division:
Class:
Order:
Family: Brassicacea
Genus: Aubrietta

Atropa belladona


Atropa (Á-tro-pa) is a genus of plants in the nightshade family. Its best-known member is the deadly nightshade, Atropa belladonna. Its pharmacologically active ingredient is atropine. The genus is named after one of the Three Fates, the one which cut the life thread.

In some older classifications, the Mandrake (Mandragora officinarum) is considered a species of the Atropa genus as Atropa mandragora.

Deadly nightshade (Atropa belladonna), also known as belladonna, dwale, Banewort, Devil's Cherries, Naughty Man's Cherries, Divale, Black Cherry, Devil's Herb, Great Morel, and Dwayberry, is a well-known perennial herbaceous plant, with leaves and berries that are highly toxic and hallucinogenic. It is in the nightshade family (Solanaceae), which it shares with potatoes, tomatoes, eggplants, jimsonweed, tobacco, goji, and chili peppers. In addition, Solanum nigrum is also called Deadly nightshade.

The Belladonna is native to Europe, North Africa, and Western Asia, and has become naturalized in parts of North America. It is not nearly as common in the wild as many field guides would suggest. This is because it is readily attacked by mint flea beetles Longitarsus waterhousei and has a low tolerance for direct sunlight. In areas where it has become naturalized it can often be found in shady, moist areas with a limestone-rich soil.

he Belladonna has dull green leaves and bell-shaped flowers that are an unremarkable shade of purple, which yield black, shiny berries measuring approximately 1 cm in diameter. The yellow form (Atropa belladonna var. lutea) has pale yellow flowers and fruit. The berries are sweet, but most of their alkaloids are in the seed. It is an herbaceous plant, and can grow to be approximately five metres tall. The leaves have an oily, "poison ivy"-like feel and can cause vesicular pustular eruptions if handled carelessly. Many animals, such as rabbits, birds and deer, seem to eat the plant without suffering harmful effects, though dogs and cats are affected.

When Belladonna is in its first stages of growing the star shaped base of the berries is barely visible.

Germination is often difficult due to the presence of germination inhibitors in the seeds. Belladonna is not common as a garden plant, and is considered a weed in some areas. Belladonna is a perennial branching herb growing to 5 metre tall, with 18 cm long ovate leaves. Belladonna contain the heaviest leaf in its angiosperm group. It is not a very hardy perennial and is sensitive to being transplanted. Germination requires several weeks in warm, moist, absolutely sterile soil, usually far from normal garden conditions.

Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Solanales
Family: Solanaceae
Genus: Atropa

Astrantia maxima


Astrantia is a genus of herbaceous plants in the family Apiaceae, endemic to Central, EasternSouthern Europe and the Caucasus. There are 8 or 9 species, which have aromatic roots, palmate leaves, and decorative flowers. They are commonly known as great masterwort, which may be confused with masterwort, Peucedanum ostruthium.

Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Apiales
Family: Apiaceae
Genus: Astrantia