Erigeron


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Erigeron

 

(fleabane), a genus of plants of the family Compositae. They are perennial and, less commonly, annual or biennial grasses or subshrubs. The leaves are entire and alternate. The inflorescences are heads that are solitary at the ends of unbranched stems or are gathered into a raceme, corymb, or panicle. The ray flowers have narrow, often threadlike ligules and form two or more series. The achenes have a sessile pappus of one or two rows of brittle bristles.

There are more than 200 species of Erigeron, distributed on all continents; they are most diverse in North America. In the USSR there are more than 70 species, including the common weeds Erigeron acer and E. canadensis. These two species, which are native to North America, contain essential oils. Certain varieties of Erigeron contain tanning substances in their stems and leaves. Many species are ornamentals; hybrid perennials, such as E. speciosus, E. aurantiacus, and E. macranthus, are raised by florists as tall ornamentals. Short varieties are grown in rock gardens.

References in periodicals archive ?
In this study, we conducted the greenhouse experiments to discuss whether individual- and group-based interspecific competition will affect the growth of invasive plant Erigeron annuus and two co-existing herbs (a native herb Artemisia indica and a common crop Ipomoea batatas in the farmland).
On the roots and shoots of Sisymbrium loeselii and Erigeron Canadensis, minerals were identified that also occur in the soils.
Asi, las especies Bowlesia tenella, Erigeron linifolius, Acicarpha tribuloides, Siphocampylus tupaeformis, Cardionema ramosissima, Lupinus chlorolepis, Hypericum caespitosum, Minthostachys setosa.
Entre otras especies frecuentes encontramos Heliotropium arborescens, Cyclanthera mathewsii (Cucurbitaceae), Sysimbrium orientale (Brassicaceae), Erigeron leptorhizon (Asteraceae), Solanum peruvianum, Sonchus oleraceus, Acmella oleracea, Phyloglossa peruviana (Asteraceae) y Raimundochloa trachyantha.
On species of the genera Aster, Conyza and Erigeron, and recorded in provinces in eastern Canada and in states of northeastern USA.
Closely related is erigeron glaucus Sea Breeze, one of the best salt resistant perennials for seaside gardens.
Try Campanula portenschlagiana (a creeping form of the pretty bell flower), Sempervivum (rosette-forming house leeks), low-growing hebes, erigeron daisies, helianthemum and Veronica spicata.
Why not upgrade to a plant that, like Erigeron scopulinus, delineates the rock it overlays?
nauseous, Chrysothamnus viscidiflorus, Erigeron aphanactis, Guterirhizia sarothrae, Haplopappus acaulis, Polygonum bistortoides, Sisymbrium altissimum Icaria acmon Acmon Blue Erigeron (Westwood and aphanactis Hewiston) Icaria Boisduval's Allium textile, icarioides Blue Balsamorhiza (Bois.
Effect of crop rotations on weed control, Bidens cernua and Erigeron canadensis populations, and carrot yields in organic soils.