Fam: Asteraceae (Compositae)
Genus: Aster L.
English Name:
Description:
Baskets medium . Bell-shaped shell composed of ordered as tile roof and ends webbed little leafs . Blossom bed flat or convex , covered with dimples. Peripheral blossoms tabs, female or infertile; less all blossoms hermaphrodite and tubular . Tabs bluish or purple . The units of the pedicles flat, oblong or pointed ; fruits rolled, fluffy , with one or more rows of hairs. Perennial plants with narrow , rough on the edges , spirally arranged leaves.
1. Peripheral blossoms in the baskets tabs, internal tubular ....................................................................................................................................... 2
1* . Tabs blossoms missing, baskets only with tubular blossoms .............................................................................................................................. 4
2 . Baskets single, large, up to 4 cm in diameter (with jke tabs together ) ................................................................................. ( 1 ) Aster alpinus L..
2* . Baskets are smaller and usually collected in the thyroid clusters ........................................................................................................................ 3
3 . Gtay - wooly plant, envelope leafs grassy shaped, with spread tips, .......................………................................................ ( 2 ) Aster amellus L.
3 * .Leaves naked inner petals almost membranous sheath , colored and lies close ................................................................ ( 5 ) Aster tripolium L.
4 . Outer wrap sheets almost elliptic or oval , dump. Leaves oblong - lanceolate. Plant usually dense fiber .............. ( 4 ) Aster villosus (L.) Sch.-Bip.
4 * Envelope laves of the the petals linear- lanceolate or linear; pointed ;narrow leaves . Nude plant. ………...…. . ( 3 ) Aster linosyris (L.) Bernh.
„Флора на България”, Н. Стоянов, Б. Стефанов, Б. Китанов, Наука и Изкуство, София, (1967)
The genus Aster once contained nearly 600 species in Eurasia and North America, but after morphologic and molecular research on the genus during the 1990s, it was decided that the North American species are better treated in a series of other related genera. After this split there are roughly 180 species within the genus, all but one being confined to Eurasia.[3] The name Aster comes from the Ancient Greek word ἀστήρ (astér), meaning "star", referring to the shape of the flower head. Many species and a variety of hybrids and varieties are popular as garden plants because of their attractive and colourful flowers. Aster species are used as food plants by the larvae of a number of Lepidoptera species—see list of Lepidoptera that feed on Aster. Asters can grow in all hardiness zones.
The genus Aster is now generally restricted to the Old World species, with Aster amellus being the type species of the genus, as well as of the family Asteraceae.[1] The New World species have now been reclassified in the genera Almutaster, Canadanthus, Doellingeria, Eucephalus, Eurybia, Ionactis, Oligoneuron, Oreostemma, Sericocarpus and Symphyotrichum, though all are treated within the tribe Astereae. Regardless of the taxonomic change, all are still widely referred to as "asters" (popularly "Michaelmas daisies" because of their typical blooming period) in the horticultural trades. See the List of Aster synonyms for more information.
Aster alpinus, Alpine aster
Aster amellus, European Michaelmas daisy or Italian aster
Aster linosyris, goldilocks aster
Aster scaber
Aster tataricus, Tatarian aster
Aster tongolensis
Aster tripolium, sea aster
From Wikipedia, the free encyclopedia
References:
„Флора на България”, Н. Стоянов, Б. Стефанов, Б. Китанов, Наука и Изкуство, София, (1967); Wikipedia, the free encyclopedia
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