Oncosiphon pilulifer

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Oncosiphon pilulifer
Onchosiphon piluliferum - Flickr - Kevin Thiele.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Oncosiphon
Species:
O. pilulifer
Binomial name
Oncosiphon pilulifer
(L.f.) Källersjö
Synonyms [1]
  • Cenocline globifera K.Koch
  • Chrysanthemum obtusum Kuntze
  • Cotula globifera Thunb.
  • Cotula pilulifera L.f.
  • Matricaria globifera Fenzl ex Harv.
  • Matricaria pilulifera Druce
  • Pentzia globifera Hutch.
  • Pentzia pilulifera (L.f.) Fourc.
  • Tanacetum globiferum DC.
  • Tanacetum obtusum Thunb.

Oncosiphon pilulifer, also known as globe chamomile and stinknet, [2] is a flowering plant in the daisy family (Asteraceae) native to South Africa and Lesotho. It is considered invasive in some parts of North America.

Contents

Other names

Synonyms include Matricaria globifera because it was previously in the Matricaria genus, and Pentzia globifera, named for 18th century Swedish botanist Carolus Johannes Pentz. [3]

The common name "stinknet" reflects the plant's strong odor.

Description

Globe chamomile is a straggly, branching annual plant with a strong smell, growing up to 2 ft (60 cm) tall. The bipinnate or tripinnate leaves have a fleshy midrib which widens at the base. The globular flowers are borne in paniculate flower heads. There are no ray florets and the disc florets are yellow. [4]

Ecology

Globe chamomile is native to South Africa and Lesotho. [1] It is also found in the Australian states of Victoria and Western Australia. [3]

In North America, globe chamomile grows from seed in November to January when it begins flowering and setting new seeds. With sufficient moisture, three generations can grow by April. Wind-borne seed transportation spreads the plant which takes root in sunny, disturbed soil in natural and cultivated areas. Plants can cause skin irritation or allergic reaction through contact with the plant or inhalation of its pollen. [5]

A single plant can contain up to 4000 flower balls, each ball being made up of hundreds of flowers. [6]

Invasiveness in the United States

Globe chamomile is considered invasive in the United States in California and Arizona. First seen in Los Angeles and San Diego in the early 1980s, it heavily infests the counties between those cities. [2] It expanded its range to the Phoenix area in the first decade of the 2000s [6] [5] and can be found in Maricopa, Pinal, and Pima counties. [2] Rapid spread in Maricopa County occurred due to above-average fall and winter precipitation in 2016, and 2018–2020. Heavy infestations occurred in northern parts of Phoenix and Scottsdale as well as to the south along the I-10 corridor towards Casa Grande. The first recorded growth in Tucson was in 2015. [2]

The plant can be removed physically or killed with triclopyr; it is resistant to glyphosate-based herbicides. [4]

The Arizona department of Agriculture considers it a "high priority pest for quarantine, control or mitigation if a significant threat to a crop, commodity, or habitat is known to exist." [6] Other problems are its density which displaces native vegetation, high flammability of dried-out patches, and caustic smoke when burned. [2]

Conservation status

Globe chamomile is a species of "least concern" (low conservation concern) in South Africa. [7]

Related Research Articles

Asteraceae Large family of flowering plants

The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae were first described in the year 1740. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of extant species in each family is unknown.

<i>Eschscholzia californica</i> Species of flowering plant and state flower of California

Eschscholzia californica, the California poppy, golden poppy, California sunlight or cup of gold, is a species of flowering plant in the family Papaveraceae, native to the United States and Mexico. It is cultivated as an ornamental plant flowering in summer, with showy cup-shaped flowers in brilliant shades of red, orange and yellow. It is also used as food or a garnish. It became the official state flower of California in 1903.

<i>Matricaria discoidea</i> Species of flowering plant

Matricaria discoidea, commonly known as pineappleweed, wild chamomile, and disc mayweed, is an annual plant native to northeast Asia where it grows as a common herb of fields, gardens, and roadsides. It is in the family Asteraceae. The flowers exude a chamomile/pineapple aroma when crushed. They are edible and have been used in salads and to make herbal tea. Pineappleweed has been used for medicinal purposes, including for relief of gastrointestinal upset, infected sores, fevers, and postpartum anemia.

<i>Leucanthemum vulgare</i> Species of flowering plant

Leucanthemum vulgare, commonly known as the ox-eye daisy, oxeye daisy, dog daisy, marguerite and other common names, is a widespread flowering plant native to Europe and the temperate regions of Asia, and an introduced plant to North America, Australia and New Zealand.

<i>Cirsium vulgare</i> Species of flowering plant in the daisy family Asteraceae

Cirsium vulgare, the spear thistle, bull thistle, or common thistle, is a species of the Asteraceae genus Cirsium, native throughout most of Europe, Western Asia, and northwestern Africa. It is also naturalised in North America, Africa, and Australia and is an invasive weed in some areas. It is the national flower of Scotland.

<i>Matricaria</i> Genus of plants

Matricaria is a genus of flowering plants in the Chamomile tribe within the sunflower family. Some of the species have the common name of "mayweed," but this name also refers to plants not in this genus.

<i>Matricaria chamomilla</i> Species of flowering plant

Matricaria chamomilla, commonly known as chamomile, German chamomile, Hungarian chamomile (kamilla), wild chamomile, blue chamomile, or scented mayweed, is an annual plant of the composite family Asteraceae. Commonly, the name M. recutita is applied to the most popular source of the herbal product chamomile, although other species are also used as chamomile. Chamomile is known mostly for its use against gastrointestinal problems; additionally, it can be used to treat irritation of the skin.

<i>Jacaranda mimosifolia</i> Sub-tropical tree with long-lasting pale indigo flowers

Jacaranda mimosifolia is a sub-tropical tree native to south-central South America that has been widely planted elsewhere because of its attractive and long-lasting violet-colored flowers. It is also known as the jacaranda, blue jacaranda, black poui, Nupur or fern tree. Older sources call it J. acutifolia, but it is nowadays more usually classified as J. mimosifolia. In scientific usage, the name "jacaranda" refers to the genus Jacaranda, which has many other members, but in horticultural and everyday usage, it nearly always means the blue jacaranda.

<i>Centranthus ruber</i> Species of flowering plant in the honeysuckle family Caprifoliaceae

Centranthus ruber, the red valerian, spur valerian, kiss-me-quick, fox's brush, devil's beard or Jupiter's beard, is a popular garden plant grown for its ornamental flowers.

<i>Tripleurospermum inodorum</i> Species of flowering plant

Tripleurospermum inodorum, common names scentless false mayweed, scentless mayweed, scentless chamomile, wild chamomile, mayweed, false chamomile, and Baldr's brow, is the type species of Tripleurospermum. This plant is native to Eurasia and North Africa, and introduced to North America, where it is commonly found in fields, fallow land and gardens.

<i>Chrysanthemoides monilifera</i> Species of plant

Osteospermum moniliferum(Chrysanthemoides monilifera) is an evergreen flowering shrub or small tree of the Asteraceae (daisy) family that is native to South Africa, such as the Cape Flats Dune Strandveld habitat. Most subspecies have woolly, dull, serrate, oval leaves, but the subspecies rotundata has glossy round leaves. Subspecies are known as boneseed and bitou bush in Australasia, or bietou, tick berry, bosluisbessie, or weskusbietou in South Africa. The plant has become a major environmental weed and invasive species in Australia and New Zealand.

<i>Anthemis cotula</i> Species of flowering plant

Anthemis cotula, also known as stinking chamomile, is a flowering annual plant with a noticeable and strong odor. The odor is often considered unpleasant, and it is from this that it gains the common epithet "stinking". In pre-colonial times, its distribution was limited to the Old Continent and Africa; though it was established in most of Europe, it was not present in Finland, Ireland, or the northernmost reaches of Scotland, in spite of the fact that these countries feature climatic regions favorable to this plant and are in proximity to countries where the species is native, such as Russia, Estonia, Lithuania and England. It has successfully migrated to the New Europes where it can be found growing in meadows, alongside roads, and in fields.

<i>Lolium perenne</i> Species of plant

Lolium perenne, common name perennial ryegrass, English ryegrass, winter ryegrass, or ray grass, is a grass from the family Poaceae. It is native to Europe, Asia and northern Africa, but is widely cultivated and naturalised around the world.

<i>Acacia mearnsii</i> Species of flowering plant

Acacia mearnsii, commonly known as black wattle, late black wattle or green wattle, is a species of flowering plant in the family Fabaceae and is endemic to south-eastern Australia. It is usually an erect tree with smooth bark, bipinnate leaves and spherical heads of pale yellow or cream-coloured flowers followed by black to reddish brown pods. In some other parts of the world, it is regarded as an invasive species.

<i>Crupina vulgaris</i> Species of flowering plant

Crupina vulgaris is a species of flowering plant in the aster family, Asteraceae. Its common names include common crupina, bearded-creeper, false saw-wort, and starry scabious. It is native to parts of Europe, Asia, and North Africa, and it is known elsewhere as an introduced species and often a noxious weed.

<i>Senecio tamoides</i> Species of vine

Senecio tamoides, also known as Canary creeper, is a climbing member of the genus Senecio of the family Asteraceae that is native to Southern Africa. It is used as an ornamental plant for its showy yellow, daisy-like flowers in autumn.

<i>Oncosiphon</i> Genus of plants

Oncosiphon is a small genus of flowering plants in the daisy family (Asteraceae). All known species are native to southern Africa.

Pectis imberbis is a species of flowering plant in the aster family, Asteraceae. It is native to Chihuahua and Sonora in Mexico and Arizona in the United States. It is known by the common names beardless chinchweed, beardless fetid-marigold, hierba de venado, and tall chinchweed.

<i>Lolium rigidum</i> Species of grass

Lolium rigidum is a species of annual grass. Common names by which it is known include annual ryegrass, a name also given to Italian ryegrass, rigid ryegrass, stiff darnel, Swiss ryegrass and Wimmera ryegrass. It is a native of southern Europe, northern Africa, the Middle East and the Indian subcontinent and is grown as a forage crop, particularly in Australia, where it is also a serious and economically damaging crop weed.

Onocosiphon suffruticosus, the shrubby mayweed, is a flowering plant native to Namibia and the Western Cape and Northern Cape provinces of South Africa. In Afrikaans it is known as knoppiesstinkkruid, the "button stink herb". The species is listed on the SANBI Red List as "safe" (LC).

References

  1. 1 2 "Oncosiphon pilulifer (L.f.) Källersjö". Plants of the World Online. Royal Botanic Gardens, Kew . Retrieved 4 April 2020.
  2. 1 2 3 4 5 "Stinknet (also called Globe Chamomile) - (Oncosiphon piluliferum)". sdcwma.org. Sonoran Desert Cooperative Weed Management Area. Retrieved April 4, 2020.
  3. 1 2 "Globe Chamomile". herbguide.com.au. Retrieved April 4, 2020.
  4. 1 2 "Globe Chamomile - A Threat Spreading Quickly" (PDF). aznps.com. Arizona Native Plant Society . Retrieved April 4, 2020.
  5. 1 2 DuHarnel, Jonathan (April 27, 2019). "Globe Chamomile, an invasive species in Arizona". Arizona Independent News Network. Retrieved April 4, 2020.
  6. 1 2 3 Woods, Alden (Apr 10, 2019). "Instagram-friendly flowers are taking over the Phoenix area. One problem: They're invasive weeds". Arizona Republic . Retrieved April 4, 2020.
  7. Foden, W. & Potter, L. 2005. Oncosiphon piluliferum (L.f.) Källersjö. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2020/04/04