Plant Database forum: alocasia zebrina entry

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JC/NYC (Zone 7b)
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skylark
Sep 24, 2014 11:02 AM CST
i came across this article on IAS site aroid.org in reference of A.zebrina names incorrectly used by sellers.
http://www.aroid.org/gallery/lucas/arch/Alocasia%20zebrina%2...
there are 2 entries in ATP db that are mentioned in the article as 'incorrect usage' due to the fact that neither one was registered.
they are: Alocasia zebrina 'Tigrina Superba' and Alocasia zebrina 'Reticulata'.
i don't know what the current view on the matter is, so i thought to let you know about the article.
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
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eclayne
Sep 24, 2014 12:06 PM CST

Plants Admin

Essentially none of the Legacy entries are registered, nor are they likely to be unless something changes at the International Aroid Society, the registration authority for most Araceae genera. Many stable forms of various Aroid genera/species, including those you've mentioned, are not registered. These primarily fall into two categories, those which are stable forms and those which are currently considered synonyms of other species.

Elephant's Ear (Alocasia zebrina 'Tigrina Superba') and Elephant's Ear (Alocasia zebrina 'Reticulata') fall into the former category. Most of the plants in this category are collected plants. Some believe these are actually different species but I don't believe genetic level studies have been conducted.

The second group of Aroids includes Alocasia macrorrhizos, Colocasia esculenta, Xanthosoma sagitiifolium and others. Theses species have been in cultivation for so long that, according to the botanists, definitively wild populations of the type plants are unknown. "Further study is required" is a common (para)phrase in many of these studies. Some of the synonyms of these species you will find in our database as accepted names or as cultivars. Elephant's Ear (Alocasia plumbea) and Purple Stem Tannia (Xanthosoma violaceum) are examples in our database.

I've found comments by Alistair Hay, Thomas Croat and Peter Boyce supporting these types of usages and encouraging people to submit these names for formal registration.

African Mask (Alocasia 'Amazonica') and African Mask (Alocasia 'Polly') are slightly different examples of plants that aren't formally registered but are included in our database. As you probably know A. x amazonica is a hybrid bred at the Amazon Nursery in Florida and never formally registered. A. 'Polly' is a tissue culture selection of A. x amazonica with shorter petioles and generally more compact habit. It was selected by one of the Rotolante brothers but I can't remember which one. Because both are common, named varieties, I've chosen to include them in our database as well, even though they've never been registered.
Evan
JC/NYC (Zone 7b)
Aroids Tropicals Container Gardener Garden Photography Amaryllis Celebrating Gardening: 2015
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skylark
Sep 24, 2014 1:51 PM CST
thanks for taking time with me - i am still in my beginning stages of plant education Smiling
and i am never sure about all these entries in db...how they differ from each other,etc.
it would be nice to color code them (my programmer's mind is never at rest ;)) - like so you would know at a glance when looking thru the list which is registered which is legacy which is common name or smth like that...it could really help to navigate, i think.
i suppose due to dna studies and reclassification you have some plants listed in 'legacy entries' and also in new correct place? just wondering...like some alo/colo is caladium now?
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
Charter ATP Member Plant Database Moderator Forum moderator Aroids Irises Celebrating Gardening: 2015
I was one of the first 300 contributors to the plant database! Tropicals Foliage Fan Bulbs Hummingbirder Lover of wildlife (Black bear badge)
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eclayne
Sep 24, 2014 4:27 PM CST

Plants Admin

If you see a plant that you feel is incorrect just ask here and we'll do our best to help. There are many new species being described every year as well. Looking thru the IAS database I've not found a plant listed as officially registered yet, but many have been published, even patented, and it may simply be slow website updates. I don't see any benefit in noting what is a legacy entry and what isn't for this reason.
Evan
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
Charter ATP Member Plant Database Moderator Forum moderator Aroids Irises Celebrating Gardening: 2015
I was one of the first 300 contributors to the plant database! Tropicals Foliage Fan Bulbs Hummingbirder Lover of wildlife (Black bear badge)
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eclayne
Sep 25, 2014 5:48 PM CST

Plants Admin

This revision to Xanthosoma illustrates the difficulties when dealing with the cultivated species I mentioned earlier, specifically X. sagittifolium.

The Commonly Cultivated Species of Xanthosoma Schott (Araceae), including Four New Species
by E. G. Goncalves, Aroideana Volume 34, 2011

In the article Goncalves argues that while "It has has been stressed that many forms can be considered cultivars of Xanthosoma sagittifolium...it seems that most authors are not completely sure about what constitutes Xanthosoma sagittifolium..."

The described species are as follows:
(species that "...can be considered cultivars of Xanthosoma sagittifolium..." are denoted, below, by an *).
Elephant Ear (Xanthosoma appendiculatum) *
Elephant Ear (Xanthosoma atrovirens) *
Arrow Leaf Elephant's Ear (Xanthosoma aureum) *
Elephant Ear (Xanthosoma blandum) *
Tanier spinach (Xanthosoma brasiliense)
Elephant Ear (Xanthosoma mafaffa) *
Crested Elephant Ear (Xanthosoma mafaffa 'Lineatum')
Mickey Mouse Taro (Xanthosoma monstruosum) *
Elephant Ear (Xanthosoma panduriforme) *
Elephant Ear (Xanthosoma riedelianum)
Arrowleaf Elephant Ear (Xanthosoma robustum)
Arrowleaf Elephant Ear (Xanthosoma sagittifolium)
Elephant Ear (Xanthosoma taioba)
Purple Stem Tannia (Xanthosoma violaceum) *
Evan

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