Allium hollandicum

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Allium hollandicum.jpg

|taxon = Allium hollandicum

|parent = Allium subg. Melanocrommyum

|authority = R.M. Fritsch

|synonyms =

|synonyms_ref =

}}

Allium hollandicum, the Persian onion[http://www.greatplantpicks.org/plantlists/view/119 Great Plant Picks, Allium hollandicum ‘Purple Sensation’ ]{{Cite web |url=http://www.thebattery.org/plants/plantview.php?id=216 |title=Battery Conservancy Plant Database, Allium hollandicum 'Purple Sensation' Purple globe onion |access-date=2014-03-21 |archive-url=https://web.archive.org/web/20140310234618/http://www.thebattery.org/plants/plantview.php?id=216 |archive-date=2014-03-10 |url-status=dead }} or Dutch garlic, is a species of flowering plant native to Iran and Kyrgyzstan[http://apps.kew.org/wcsp/acceptedRef.do?name_id=295720 Kew World Checklist of Selected Plant Families] but widely cultivated as an ornamental because of its umbels of attractive purple flowers.[http://www.pacificbulbsociety.org/pbswiki/index.php/AlliumSpeciesTwo Pacific Bulb Society, Allium Species Two]{{Cite web |url=http://www.thebattery.org/plants/plantview.php?id=216 |title=Battery Plant Conservancy, New York, Battery Database, Allium hollandicum 'Purple Sensation' Purple globe onion |access-date=2014-03-21 |archive-url=https://web.archive.org/web/20140310234618/http://www.thebattery.org/plants/plantview.php?id=216 |archive-date=2014-03-10 |url-status=dead }}[http://www.lejardindesophie.net/liste%20des%20plantes/da/allium%20afla.html Le Jardin de Sophie, Bruxelles, Allium hollandicum ( = A. aflatunense) ail décoratif (alliacée)] It is reportedly naturalized in Saint Louis County, Minnesota.{{Cite web

|url=http://www.bellmuseum.umn.edu/prod/groups/cfans/@pub/@cfans/@bell/documents/asset/cfans_asset_357853.pdf |title=Anita F. Cholewa. 2011. Annotated Checklist of the Flora of Minnesota |access-date=2014-03-21 |archive-url=https://web.archive.org/web/20150417020332/http://www.bellmuseum.umn.edu/prod/groups/cfans/@pub/@cfans/@bell/documents/asset/cfans_asset_357853.pdf |archive-date=2015-04-17 |url-status=dead }}[http://bonap.net/MapGallery/County/Allium%20hollandicum.png BONAP (Biota of North America Project), floristic synthesis, Allium hollandicum]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.

Allium hollandicum is a bulb-forming perennial with scapes up to {{convert|90|cm|in|abbr=on}} tall. It has long, flat, strap-shaped leaves up to {{convert|60|cm|in|abbr=on}} long. Umbels are relatively small and spherical, up to {{convert|10|cm|in|abbr=on}} in diameter, composed of many purple to reddish-purple star-shaped flowers appearing in late spring and early summer.Fritsch, Reinhard M. 1993. Candollea 48(2): 422.{{Cite web |url=http://www.rhs.org.uk/Gardens/Hyde-Hall/About-HydeHall/Plant-of-the-month/May/Allium-hollandicum-Purple-Sensation- |title=Royal Horticultural Society, London, Allium hollandicum 'Purple Sensation' |access-date=2014-03-21 |archive-url=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- |archive-date=2014-02-27 |url-status=dead }}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.

The popular cultivar 'Purple Sensation' has gained the Royal Horticultural Society's Award of Garden Merit.{{cite web | url= https://www.rhs.org.uk/Plants/57088/i-Allium-hollandicum-i-Purple-Sensation/Details

| title = RHS Plantfinder - Allium hollandicum 'Purple Sensation'

| publisher=Royal Horticultural Society | date=1993 | accessdate=5 January 2018}} It prefers moist, fertile soil in full sun.