Ageratina altissima GudangMovies21 Rebahinxxi LK21

    Ageratina altissima, also known as white snakeroot, richweed, or white sanicle, is a poisonous perennial herb in the family Asteraceae, native to eastern and central North America. An older binomial name for this species is Eupatorium rugosum, but the genus Eupatorium has undergone taxonomic revision by botanists, and some species once included in it have been moved to other genera.


    Description


    Plants are upright or sometimes ascending, growing to 1.5 metres (4.9 ft) tall, producing single or multi-stemmed clumps in mid to late summer and fall. Stems are smooth with opposite leaves spaced well apart, with each pair of leaves positioned at a 90-degree angle from the pair above and below (decussate). The upper part of the plant has multiple branches, which usually appear in opposite pairs. Leaves have sharply serrated margins and are up to 15 centimetres (6 in) long.
    At the end of the upper branches, flat-topped panicles or compound corymbs of white flower heads appear, measuring 5–15 centimetres (2–6 in) across. The flowers are a clean white color and after blooming, small seeds with fluffy white tails are released to blow in the wind. The plant can spread either by the wind dispersal of its seeds or by rhizomes.
    There are two different varieties: Ageratina altissima var. altissima and Ageratina altissima var. roanensis (Appalachian white snakeroot); they differ in the length of the flower phyllaries and shape of the apices.


    Distribution and habitat


    A. altissima is native to the central and eastern United States, from Texas in the west to Maine in the east and north, and Florida in the south. The species is also native in Canada in Quebec, Ontario, and the Northwest Territories. The species is adaptive to different growing conditions: it is found in woods and brush thickets and also in shady areas with open bare ground, and it can be weedy in shady landscapes and hedgerows.


    Ecology


    The plant blooms in the fall, from July to October. Its nectar attracts many species of butterflies and moths, bees, wasps, and flies. It is a larval host for a few varieties of moths, including the Clymene moth (Haploa clymene), Leucospilapteryx venustella, and the hitched dart moth (Melanchra adjuncta).


    = Galls

    =
    This species is host to the following insect induced galls:

    Asphondylia eupatorii Felt, 1911 (spring and summer generations) stem gall midge
    Neolasioptera eupatorii (Felt, 1907) stem gall midge
    Schizomyia eupatoriflorae (Beutenmuller, 1907) Stem gall midge (see image).

    external link to gallformers


    Toxicity



    White snakeroot contains the toxin tremetol; when the plants are consumed by cattle, the meat and milk become contaminated with the toxin. When milk or meat containing the toxin is consumed, the poison is passed on to humans. If consumed in large enough quantities, it can cause tremetol poisoning in humans. The poisoning is also called milk sickness, as humans often ingested the toxin by drinking the milk of cows that had eaten snakeroot. Although 80% of the plant's toxin, tremetone, decreases after being dried and stored away for 5 years, its toxic properties remain the same.

    During the early 19th century, when large numbers of European Americans from the East, who were unfamiliar with snakeroot, began settling in the plant's habitat of the Midwest and Upper South, many thousands were killed by milk sickness. Notably, milk sickness was possibly the cause of death in 1818 of Nancy Hanks Lincoln, mother of Abraham Lincoln.
    It was some decades before European Americans traced the cause to snakeroot, although today Dr. Anna Pierce Hobbs Bixby is credited with identifying the plant in the 1830s. Legend has it that she was taught about the plant's properties by a Shawnee woman.
    In addition to cattle, the plants are also poisonous to horses, goats, and sheep. Signs of poisoning in these animals include depression and lethargy, placement of hind feet close together (horses, goats, cattle) or held far apart (sheep), nasal discharge, excessive salivation, arched body posture, and rapid or difficult breathing.


    Cultivation


    A cultivar, sold under the name Eupatorium rugosum 'Chocolate', is grown in gardens for its dark-tinted foliage. The darkest color, which is a chocolate black, occurs in plants grown in a sunny location. The plants are shade-tolerant and do best in moist soils. More recently, the plant can be found under the correct species name.


    Etymology


    Ageratina is derived from Greek meaning 'un-aging', in reference to the flowers keeping their color for a long time. This name was used by Dioscorides for a number of different plants.
    Altissima means "the tallest", and probably indicates that this is the tallest species in its genus.


    See also


    List of poisonous plants
    List of plants poisonous to equines


    References




    External links


    Media related to Ageratina altissima at Wikimedia Commons
    Data related to Ageratina altissima at Wikispecies
    NRCS. "Ageratina altissima". PLANTS Database. United States Department of Agriculture (USDA).
    Ageratina altissima images from Vanderbilt University
    Picture of Eupatorium rugosum, Missouri State University

Kata Kunci Pencarian:

ageratina altissimaageratina altissima white snakerootageratina altissima l rm king & h robageratina altissima chocolateageratina altissima braunlaubageratina altissima usosageratina altissima native rangeageratina altissima medicinal usesageratina altissima l rm kingageratina altissima common name
Ageratina altissima, White Snakeroot at Toadshade Wildflower Farm

Ageratina altissima, White Snakeroot at Toadshade Wildflower Farm

Ageratina altissima – Blue Thumb

Ageratina altissima – Blue Thumb

Ageratina altissima (NGN) - Natural Garden Natives

Ageratina altissima (NGN) - Natural Garden Natives

Ageratina altissima - Jersey-Friendly Yards

Ageratina altissima - Jersey-Friendly Yards

Ageratina altissima 2 | Wicklein

Ageratina altissima 2 | Wicklein's Wholesale Native Plant Nursery Maryland

Ageratina altissima page

Ageratina altissima page

Ageratina altissima – Meadow City

Ageratina altissima – Meadow City

Photo #22451 | Ageratina altissima

Photo #22451 | Ageratina altissima 'Chocolate' | plant lust

Ageratina altissima – Meadow City

Ageratina altissima – Meadow City

Ageratina altissima – Native Gardens of Blue Hill

Ageratina altissima – Native Gardens of Blue Hill

Ageratina altissima

Ageratina altissima 'Chocolate' – Ballyrobert Gardens

Ageratina altissima

Ageratina altissima 'Chocolate' – Ballyrobert Gardens

Search Results

ageratina altissima

Daftar Isi

Ageratina altissima - Wikipedia

Ageratina altissima, also known as white snakeroot, [3] richweed, [3] or white sanicle, [4] is a poisonous perennial herb in the family Asteraceae, native to eastern and central North America.

Ageratina altissima - Plant Finder - Missouri Botanical Garden

Ageratina altissima commonly called white snakeroot, is native to woodland areas in the Eastern United States. It is common throughout Missouri where it typically occurs in rich or rocky woods, thickets, wood margins and rocky areas (Steyermark).

White Snakeroot (Ageratina altissima) - Illinois Wildflowers

White Snakeroot has been reassigned recently to the genus Ageratina, although it is still often referred to as Eupatorium rugosum. Normally, White Snakeroot is largely hairless, although some authorities describe a pubescent variety of this species.

Ageratina altissima - North Carolina Extension Gardener Plant …

White Snakeroot is a herbaceous perennial in the aster family (Asteraceae) The plant is native to woodland areas in the Eastern United States and typically occurs in rich or rocky woods, thickets, wood margins, and rocky areas. The Genus name is Greek meaning 'un-aging', referring to the flowers keeping their color for a long time.

A Complete Guide To White Snakeroot – What You Need To Know!

White Snakeroot is a herbacrous perennial flower native to Eastern North America. Scientifically known as Ageratina altissima, it grows 1-3′ tall in partial shade and average moisture. Blooming white flowers in late Summer to Fall, it provides nectar to …

Ageratina altissima White Snakeroot | Prairie Moon Nursery

White Snakeroot bears clusters of small, foamy white flowers, often reaching 2 to 4 feet in height. Toothed, somewhat heart-shaped leaves drape elegantly from long stems. Blooming in late summer, this plant keeps its dainty blossoms well into …

White snakeroot | Poisonous, Toxic, Invasive | Britannica

White snakeroot, (Ageratina altissima), poisonous North American herb of the aster family (Asteraceae). White snakeroot contains a toxic alcohol (tremetol), and cattle allowed to pasture on the plant may suffer muscular tremors (the “trembles”), weakness, constipation, and death.

Ageratina altissima — white snakeroot - Go Botany

Mesic, deciduous forests, especially rich types, riparian forests.

Ageratina altissima (White Snakeroot) - Gardenia

Ageratina altissima (White Snakeroot) is a clump-forming, spreading, herbaceous perennial boasting flat-topped clusters of small, fluffy, bright white flowers in summer and fall. Borne atop erect, strong branching stems, the long-lasting blossoms are attractive to bees, butterflies and moths in search of nectar.

Ageratina altissima - New England Wild Flower Society

Ageratina is a striking summer bloomer, with fuzzy white flowers clustering towards the tips of the racemes. This species naturalizes readily and can be aggressive in sunny, moist spots, so make sure to site it accordingly. Particularly great for native bees!