* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Ragweed (Ambrosia artemisiifolia L.) Genus: Ambrosia (am
Evolutionary history of plants wikipedia , lookup
Ecology of Banksia wikipedia , lookup
History of botany wikipedia , lookup
Plant stress measurement wikipedia , lookup
Plant use of endophytic fungi in defense wikipedia , lookup
Plant nutrition wikipedia , lookup
Plant secondary metabolism wikipedia , lookup
Plant defense against herbivory wikipedia , lookup
Plant breeding wikipedia , lookup
Ornamental bulbous plant wikipedia , lookup
Plant physiology wikipedia , lookup
Venus flytrap wikipedia , lookup
Plant ecology wikipedia , lookup
Flowering plant wikipedia , lookup
Pollination wikipedia , lookup
Plant evolutionary developmental biology wikipedia , lookup
Plant morphology wikipedia , lookup
Plant reproduction wikipedia , lookup
Verbascum thapsus wikipedia , lookup
Ragweed (Ambrosia artemisiifolia L.) Family: Asteraceae (ass-ter-AY-see-ee) From the aster or daisy family which was formerly called Compositae. Alternative Pronunciation: ass-ter-AY-see-ay Genus: Ambrosia (am-BRO-zhuh) From the Greek ambrŏsia, which, in ancient mythology, was the nectar of the gods. This food would make those who ate or drank it immortal. Now it refers to the group of plants which produce great amounts of tiny air borne pollen causing hay fever. Species: artemisiifolia (ar-te-miz-ee-eye-FOH-lee-uh) Means to have foliage like the Artemisia plant which was named for the Artĕmis, the Greek goddess of chastity. Ragweed The plant is named for the raggedy shape of its leaves. Common Ragweed (also known as annual ragweed, bitterweed, blackweed, and American wormwood) is an annual which is the most widespread plant of its genus in North America. It grows in many places in Altona Forest, but especially around the edge along the fences. Ragweed Common Ragweed, Annual Ragweed, Annual Bur-Sage The leaves are 4 to 10 cm long, egg-shaped in outline and once or twice bipinnately compound giving them a lacy appearance. They are hairy on upper surface and margin and densely appressed on lower surface. The lower leaves are opposite on the stem while the upper ones alternate. The stems are erect, branched, with long, rough hairs. Ragweed It grows from 15 – 170 cm tall. The stems have many branches. The roots are a shallow taproot which makes it easy to pull up. Ragweed Common ragweed's nasty pollen causes much misery to hay-fever sufferers. Goldenrod, which is blamed for hay-fever, is innocent of this malady. The very numerous, tiny, non-showy, greenish flowers grow along long spikes from August until the end of summer. The drabness of the flowers do not attract insects. The fine yellow grains of pollen are very small and easily carried by the wind which is the reason it is so bad for hayfever suffers. The mainly green flower parts are not discernable without a magnifying lens. Ragweed The fruit is a woody achene, yellowish- to reddish-brown, 3-4 mm long and resembles a crown. The numerous seeds are rich in oil and desired by songbirds. To Return to the Plant List Click on the Trout Lily Below To end this program click on this box.