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  ID on Philodendron
From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.03 at 07:00:06(17714)

Can any of you give me a possible ID on this Philodendron? The lrgest leaves are currently approximately 10 inches and I've had it for two years. As you can see, some of the leaves are bicolorous. It is kept in moderately low light so the color changes have little to do with the sunlight. The upper side of the blade is glossy, bottom is slightly matte. The plant has slightly red aerial roots. The tag vanished so any possible ID would at least start me in the right direction.

Thanks!

Steve Lucas

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From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.03 at 13:13:42(17720)

Also, the leaf blades are less thand coriacious.

Steve

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From: pugturd at alltel.net (Brian Williams) on 2008.06.03 at 20:31:48(17725)

Steve I cannot say for sure but this looks similar to plants I grew from
seed from Brazil as eximium. Which were later IDed as Agra dos Reis. I
now have what looks to be exactly the same plant that was collected in
Brazil as my seedlings and it is tagged as cordifolium. I know they are
not eximiums but am now confused if they are Agra dos Reis or
cordifolium. Either way they are beautiful species.
I have photos of the seedlings and mature plants if interesting in
seeing more. Thanks.

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From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.03 at 23:51:27(17726)
Then I'll start with the name Philodendron Agra dos Reis and see what turns up!

Thanks Brian!

Steve

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From: mnadruz at jbrj.gov.br (Marcus Nadruz) on 2008.06.04 at 04:49:09(17729)
Dear friends,
Certainly the species is neither eximium and not cordatum, but remembers very P. scandens, differing slightly because of yellow spots on some leaves.

Marcus

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From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.04 at 14:35:40(17737)
Marcus, I do not wish to bicker, but you might want to read this page:

http://www.exoticrainforest.com/Philodendron%20hederaceum%20pc.html

I did a great deal of research which began close to two years ago with Dr. Croat's help. P. scandens is simply a synonym of Philodendron hederaceum as are Arum hederaceum, Philodendron micans, Philodendron miduhoi, Philodendron oxycardium, Philodendron acrocardium, Philodendron cuspidatum, Philodendron hoffmannii, Philodendron microphyllum, Philodendron pittieri and others. It is true Philodendron hederaceum can grow quite large, up to 48cm (19 inches) in the rain forest. But I would have difficulty accepting this specimen as P hederaceum (scandens) unless Dr. Croat has a differing opinion. It is one of the most variable of all Philodendron species and is the source of great confusion. The argument regarding the true name of this plant dates back to close to 180 years but is now settled in botany. Still, collectors challenge the name all the time and continue to prefer P. scandens, P. micans and others. I attempt to explain all of that in detail on the page link above and most of my material was give
n either by Dr. Croat in personal conversation in his office, via email or from his published work. Please take the time to read the page and then offer your comments.

Steve Lucas

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From: criswick at spiceisle.com (criswick) on 2008.06.04 at 14:42:48(17739)
The name is actually Angra dos Reis , and not Agra dos Reis. This common
name is applied to a Philodendron illustrated in Exotica, and I have no idea
as to the plant's true identity. However I have a plant in my collection
which might be it. I must say that I didn't think that the plant in your
photo, Steve, looked at all like Angra dos Reis. But it is, I suppose, a
lead, and one might see where it goes.

John Criswick.

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From: criswick at spiceisle.com (criswick) on 2008.06.04 at 15:51:34(17741)
Evidently the philodendron is named after the town of Angra dos Reis,
southwest of Rio de Janeiro. The name appears to mean "King's Bay".

John Criswick.

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From: mnadruz at jbrj.gov.br (Marcus Nadruz) on 2008.06.05 at 03:45:00(17749)
Dear Lucas,

I ask excuses for failure, in fact you are right and I knew but I just mentioned by custom P. scandens.

Thank you for correction.

Marcus

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From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.05 at 14:33:17(17757)
Marcus, I sincerly hope you found my response simply to be informational. I too often state things that are not scientifically accurate. Just ask Dr. Croat, Leland and Julius!

Steve

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From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.07 at 12:09:14(17793)
Marcus, I owe you a sincere apology! I was totally unaware of your incredible credentials. I am having some difficulty making physical characteristics of this plant match up with Dr. Croat's written description, but due to your extensive knowledge of Brazilian species will certainly tag it for now as another of the wide variations of Philodendron hederaceum.

This one has grown at three times the rate of any of the other 5 species variations I grow. The leaves are quite thin, no color onthe underside, highly glossy on the top and slightly matte beneath. The aerial roots are reddish and more widely spaced than all my other Philodendron hederaceum variation. The vein structure also bears little resemblance. But since I've done all I can to understand variation within species it becomes more and moe evident "anything is possible". And that's a quote from Dr. Croat.

I hope you know that from the moment I began my website almost 3 years ago my only goal has been accuracy within botanical science. As is overly seen on this forum, I am simply a student of botany and ask the experts for advice all the time. I also get in trouble when I try to give it! I would very much enjoy being able to add you to that list of experts.

And for those on this forum not familiar with Marcus Nadiz, here are some things to consider. Marcus has an extensive background in Brazilian botany as a result of his association with the Kew. He knows what the Brazilians call common species which may be misidentified or little known. He works at Rio Botanical Garden as well with a library that is filled with information. His participation on Aroid l should be greatly valued besides the fact he is fluent in English!

Marcus, please forgive my trying to explain anything to you! I simply was not aware of your stature within Brazilian botany. But I won't soon forget your name.

Just for the record, I receive at least 4 or 5 emails each week from some self proclaimed "expert" telling me the information on one or more of my pages is incorrect. And Philodendron hederaceum is at the top of the list! Almost everyone wants me to put up a separate page for P. scandens, P. micans, P. miduhoi and all the rest. The problem is I'd simply be redescribing the same species over and over! Almost always those "experts" turn out to be a plant collector who prefers to believe what they find on the internet rather than in a botanist's journal. I read these things until my eyes get sore! I will never be a botanist, although I wish I had started 40 years ago! But I deeply want to learn, especially about aroids. So information from people such as Marcus is highly valued in my untrained eyes!

Thanks Marcus. I'll go make a new tag right now and include the common name offered by John.

Steve Lucas

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From: mnadruz at jbrj.gov.br (Marcus Nadruz) on 2008.06.08 at 11:14:10(17809)
Dear Steve,

I thank you for your words and I do not mind when someone corrects me, I also like to learn from my mistakes.
I hope always help with my knowledge of the Araceae of Brazil.
Congratulations on his website, it is very informative and interesting.

Marcus

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From: Steve at ExoticRainforest.com (ExoticRainforest) on 2008.06.09 at 08:10:47(17816)
My thanks to you and everyone who helps.

Steve

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