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Comments ( Anglèis )

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Most populations of Arctotheca calendula are sterile and spread aggressively by stolons; at least three populations in the flora are fertile and highly invasive. The species is listed by the California Exotic Pest Plant Council (CalEPPC) as a weed with the potential to spread explosively (Red Alert, CDFA A).
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
sitassion bibliogràfica
Flora of North America Vol. 19: 196, 197 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description ( Anglèis )

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Plants usually stoloniferous. Leaves obovate, (2–)5–20(–30+) × (1–)2–5(–7) cm, margins pinna­ti-sect (lyrate to runcinate), remotely prickly, abaxial faces white-pannose, adaxial faces sparsely puberulent to arachnose, usually glandular as well. Heads 4–7 cm diam. (across the rays). Phyllaries: outer reflexed, apices mucronate, white-woolly; inner appressed, margins hyaline, apices rounded, glabrous. Ray florets 11–17(–25); corolla laminae abaxially greenish to purplish, adaxially yellow (drying to basally ochroleucous, apically blue, forming bull’s eye around disc), 10–25 × 2–4 mm, sparsely puberulent, glandular. Disc florets: corollas yellow proximally, bluish distally. Cypselae dark brown, 3 mm, densely woolly; pappi ca. 0.5 mm (usually hidden by hairs on cypselae).
licensa
cc-by-nc-sa-3.0
drit d'autor
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
sitassion bibliogràfica
Flora of North America Vol. 19: 196, 197 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
sorgiss
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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eFloras

Synonym ( Anglèis )

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Arctotis calendula Linnaeus, Sp. Pl. 2: 922. 1753; Cryptostemma calendula (Linnaeus) Druce
licensa
cc-by-nc-sa-3.0
drit d'autor
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
sitassion bibliogràfica
Flora of North America Vol. 19: 196, 197 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
sorgiss
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
proget
eFloras.org
original
visité la sorgiss
sit compagn
eFloras

Arctotheca calendula ( Anglèis )

fornì da wikipedia EN

Arctotheca calendula is a plant in the sunflower family commonly known as capeweed,[2] plain treasureflower,[3] cape dandelion, or cape marigold because it originates from the Cape Province in South Africa.[4][5] It is also found in neighboring KwaZulu-Natal.[6]

Description

Arctotheca calendula is a squat perennial or annual which grows in rosettes and sends out stolons and can spread across the ground quickly. The leaves are covered with white woolly hairs, especially on their undersides. The leaves are lobed or deeply toothed. Hairy stems bear daisy-like flowers with small yellow petals that sometimes have a green or purple tint surrounded by white or yellow ray petals extending further out from the flower centers.

Cultivation

It is cultivated as an attractive ornamental groundcover but has invasive potential when introduced to a new area. The plant can reproduce vegetatively or via seed. Seed-bearing plants are most likely to become weedy, taking hold most easily in bare or sparsely vegetated soil or disturbed areas.[7]

Spread

Arctotheca calendula is naturalized in California,[8][9] Spain,[10][11] Portugal, Italy,[12] Australia,[13][14] and New Zealand,[15] and considered a noxious weed in some of those places.

References

  1. ^ The Plant List Arctotheca calendula (L.) Levyns
  2. ^ USDA, NRCS (n.d.). "Arctotheca calendula". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 8 January 2016.
  3. ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  4. ^ Levyns, Margaret Rutherford Bryan 1942. Journal of South African Botany 8(4): 284
  5. ^ "Tropicos | Name - Arctotheca calendula (L.) Levyns". www.tropicos.org. Retrieved October 1, 2019.
  6. ^ "Arctotheca calendula | PlantZAfrica". pza.sanbi.org. Retrieved October 1, 2019.
  7. ^ "Arctotheca calendula in Flora of North America @ efloras.org". www.efloras.org. Retrieved October 1, 2019.
  8. ^ California Invasive Plant Council, University of California @ Davis
  9. ^ "Arctotheca calendula Calflora". www.calflora.org. Retrieved October 1, 2019.
  10. ^ Flora Vascular de Andalucía Occidental, Arctotheca calendula (L.) Levyns in Spanish
  11. ^ Flora Catalana, Arctotheca calendula in Catalan with color photos
  12. ^ Altervista Flora Italiana, Arctoteca simile alla calendola, Arctotheca calendula (L.) Levyns numerous photos
  13. ^ "Arctotheca calendula". Atlas of Living Australia. Retrieved October 1, 2019.
  14. ^ Weeds Australia, Capeweed Arctotheca calendula
  15. ^ Flora of New Zealand Arctotheca calendula (L.) Levyns

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Arctotheca calendula: Brief Summary ( Anglèis )

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Arctotheca calendula is a plant in the sunflower family commonly known as capeweed, plain treasureflower, cape dandelion, or cape marigold because it originates from the Cape Province in South Africa. It is also found in neighboring KwaZulu-Natal.

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Wikipedia authors and editors
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wikipedia EN