http://www.planthardiness.gc.ca/index.pl?lang...
Alnus ×spaethii Callier […]
Spaeth’s alder

http://davisla.wordpress.com/2012/08/25/plant...
Alnus spaethii is commonly known as Spaeth’s Alder.

http://www.glasgow.gov.uk/CHttpHandler.ashx?i...
Spaeth’s alder ¦ Alnus spaethii

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http://www.pflanzen-fuer-unsere-gaerten.ch/Ar...
Alnus spaethii (x)
Purpurerle

http://www.pollenstiftung.de/aktuelles-einzel...
In der Fachzeitschrift «New England Journal of Medicine» erhält eine vom Schweizer Arzt Markus Gassner lancierte Studie besondere Anerkennung. Sie weist nach, dass die nicht heimische Purpurerle (Alnus spaethii) seit drei Jahren bereits an Weihnachten blüht, was gerade bei Kindern nachweisbar zu Immunreaktionen führt.

http://www.alleebaume.ch/de/alnus-spaethii.html
Alnus spaethii - Purpurerle

http://www.baumschule-newgarden.de/product_in...
Alnus spaethii / Purpur-Erle

http://www.gartenstauden.de/baumschul-pflanze...
Alnus spaethii - Purpur-Erle

http://www.pflanzenfuchs.de/laubgehoelze/alnu...
Alnus spaethii oder Purpur-Erle stammt aus Mitteleuropa und wird als farbenprächtiger mittelgroßer Baum 12 bis 15 m hoch.

A horticultural hybrid known only from cultivation.
Pictures / Bilder

Andere deutsche Namen (nicht vorgeschlagen):
Großblättrige Erle

Taxonomic citation:
Alnus × spaethii Callier, Mitteilungen der Deutschen Dendrologischen Gesellschaft 1908: 215. 1908.

The name honors either Franz Ludwig Späth (1838–1913) or his father, Ludwig Späth (1793–1883), fifth- and fourth-generation (respectively) family owners & managers of what was once the world’s largest nursery (covering 120 hectares) in what is today called the Baumschulenweg district of Treptow-Köpenick, Berlin. See:
Deutsch Wikipedia-Artikel über Franz Späth
English Wikipedia article on Franz Ludwig Späth
English Wikipedia article on Ludwig Späth
Deutsch Wikipedia-Artikel über Späth-Arboretum
English Wikipedia article on Späth-Arboretum
English Wikipedia article on Späth nursery
Callier’s only indication for the origin of the name: Seite 216, Mitteilungen der Deutschen Dendrologischen Gesellschaft für 1908
Alfons Callier, who first distinguished & named this hybrid, & who claimed its discovery for himself, did not specify which member of the family he honored. Many authorities say the honor was intended for the elder Ludwig for first discovering the hybrid, but Ludwig died eleven years before it was first grown in his son’s Arboretum. Some authorities say that the plant was named for the Arboretum where it was first found, but that would properly require naming the plant “spaethiana” or “spaethiensis”. If Callier had intended to honor both or all members of the Späth family, then that would properly require naming the plant “spaethiorum”. Callier knew his Latin & he knew the proper way of naming plants. He chose the epithet “spaethii” to honor one person, but neglected to specify which family member he intended to honor.
NOTE: The Arboretum is open to the public. The nursery closed in 1944 after 224 years of operation under six generations of the Späth family.

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