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  Re: [Aroid-l] Dieffenbachia hoffmannii photo?
From: ExoticRainforest <Steve at ExoticRainforest.com> on 2010.03.04 at 05:49:42(20691)
The photo in Graf's material is verysimilar to Dieffenbachia seguine (Jacq.)Schott. That species has a ton of synonym names but since" hoffmanii"is not a legitimate name it isn't in the list. As I stated earlier,Mr. Graf's books are a good photo source but Dr. Croat has pointed outin several personal conversations his photos are often improperlycaptioned.

I would suggest you go to the link below, check the photo, then clickon "specimens" at the top of the page. Scroll down to any that werecollected by Dr. Croat, scroll over to the right of the page and clickon his collection number. There you will find where he collected italong with his field notes. Frequently there is enough material thereto make a good ID of a plant, just read as many of Tom's notes aspossible.

http://www.tropicos.org/Name/2106342

However, like all aroids this species can be variable. If you click onthe synonyms on the first page you'll find a long list of additionalnames (now invalid) granted to this species. My guess is you likelyhave a synonym of this species. Although your plant is far too old tobe one of the recent tissue cultures there are many variations beingcreated in tissue culture of this species that can be bought at manystores.

I believe the speciesis in Dr. Croat's Revision of Dieffenbachia(Araceae) of Mexico, Central America, and the West Indies butI don't have a copy. If you have access to JSTOR Isuggest you check out that source.

For those on Aroid l not familiar with natural variability this linkmay be useful. The article addresses why many of us have troublelearning what species we are growing. I recently rewrote the entirepage and added a bunch of photos to illustrate how extreme variabilitycan be in aroid species. I've already asked several well knownaroiders to read the info and so far only one objection has come backto one particular section. I addressed that and feel relativelyconfident the material is scientifically accurate.

If any of you with a strong background in botany find an error I willquickly address the problem: http://www.exoticrainforest.com/Natural%20variation%20within%20aroid%20and%20%20plant%20species.html

Steve

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