Allium hollandicum explained

Allium hollandicum, the Persian onion^{[1] [2]} or Dutch garlic, is a species of flowering plant native to Iran and Kyrgyzstan^[3] but widely cultivated as an ornamental because of its umbels of attractive purple flowers.^{[4] [5] [6]} It is reportedly naturalized in Saint Louis County, Minnesota.^{[7] [8] [9]}

Allium hollandicum is a bulb-forming perennial with scapes up to 90cm (40inches) tall. It has long, flat, strap-shaped leaves up to 60cm (20inches) long. Umbels are relatively small and spherical, up to 10cm (00inches) in diameter, composed of many purple to reddish-purple star-shaped flowers appearing in late spring and early summer.^{[10] [11] [12]}

The popular cultivar 'Purple Sensation' has gained the Royal Horticultural Society's Award of Garden Merit.^[13] It prefers moist, fertile soil in full sun.

Notes and References

1. http://www.greatplantpicks.org/plantlists/view/119 Great Plant Picks, Allium hollandicum ‘Purple Sensation’
2. Web site: Battery Conservancy Plant Database, Allium hollandicum 'Purple Sensation' Purple globe onion . 2014-03-21 . https://web.archive.org/web/20140310234618/http://www.thebattery.org/plants/plantview.php?id=216 . 2014-03-10 . dead .
3. http://apps.kew.org/wcsp/acceptedRef.do?name_id=295720 Kew World Checklist of Selected Plant Families
4. http://www.pacificbulbsociety.org/pbswiki/index.php/AlliumSpeciesTwo Pacific Bulb Society, Allium Species Two
5. Web site: Battery Plant Conservancy, New York, Battery Database, Allium hollandicum 'Purple Sensation' Purple globe onion . 2014-03-21 . https://web.archive.org/web/20140310234618/http://www.thebattery.org/plants/plantview.php?id=216 . 2014-03-10 . dead .
6. http://www.lejardindesophie.net/liste%20des%20plantes/da/allium%20afla.html Le Jardin de Sophie, Bruxelles, Allium hollandicum (= A. aflatunense) ail décoratif (alliacée)
7. Web site: Anita F. Cholewa. 2011. Annotated Checklist of the Flora of Minnesota . 2014-03-21 . https://web.archive.org/web/20150417020332/http://www.bellmuseum.umn.edu/prod/groups/cfans/@pub/@cfans/@bell/documents/asset/cfans_asset_357853.pdf . 2015-04-17 . dead .
8. http://bonap.net/MapGallery/County/Allium%20hollandicum.png BONAP (Biota of North America Project), floristic synthesis, Allium hollandicum
9. Fritsch, R.M., Blattner, F.R. & Gurushidze, M. (2010). New classification of Allium L. subg. Melanocrommyum (Webb & Berthel.) Rouy (Alliaceae) based on molecular and morphological characters. Phyton: Annales Rei Botanicae 49: 145-320.
10. Fritsch, Reinhard M. 1993. Candollea 48(2): 422.
11. Web site: Royal Horticultural Society, London, Allium hollandicum 'Purple Sensation' . 2014-03-21 . https://web.archive.org/web/20140227022714/http://www.rhs.org.uk/Gardens/Hyde-Hall/About-HydeHall/Plant-of-the-month/May/Allium-hollandicum-Purple-Sensation- . 2014-02-27 . dead .
12. Fritsch, R.M., Blattner, F.R. & Gurushidze, M. (2010). New classification of Allium L. subg. Melanocrommyum (Webb & Berthel.) Rouy (Alliaceae) based on molecular and morphological characters. Phyton: Annales Rei Botanicae 49: 145-320.
13. Web site: RHS Plantfinder - Allium hollandicum 'Purple Sensation'. Royal Horticultural Society . 1993 . 5 January 2018.