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  Panama Aroid
From: "Harry Witmore" <harrywitmore at witmore.net> on 2009.11.21 at 04:10:25(20350)
This plant is being passed around the dart frog hobby since it makes such a nice small aroid to grow in terrariums. It was supposedly collected in Panama but I have no other info other than that. If someone had told me it was from Asia I would say it was a species of Pothos. Any ideas on the id?

http://www.cloudjungle.com/CloudJungle/Araceae/Unknown/Aroid_1_1.JPG

http://www.cloudjungle.com/CloudJungle/Araceae/Unknown/Aroid_1_2.JPG

http://www.cloudjungle.com/CloudJungle/Araceae/Unknown/Aroid_1_3.JPG

http://www.cloudjungle.com/CloudJungle/Araceae/Unknown/Aroid_1_4.JPG

Harry Witmore

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From: ExoticRainforest <Steve at ExoticRainforest.com> on 2009.11.22 at 14:45:18(20354)
I may be way off Harry but it justlooks like a juvenile Philodendron hederaceum (micans,scandens, oxycardium) based on the stem, venation and one cataphyll. Tom would be the best source. Some have the velvet appearance but manyforms don't. We saw a fairly large semi-adult at the Myriad Centeryesterday that had no velutinous appearance and I have several in myatrium that don't show it as well.

Steve

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From: Peter Boyce <phymatarum at googlemail.com> on 2009.11.22 at 15:03:23(20355)
Harry,

This looks to be a Philodendron in subgen. Pteromischum. THE expert on this group is Missouri's Mike Grayum.

Cheers

Peter

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From: RAYMOMATTLA at cs.com on 2009.11.22 at 18:19:52(20356)
In a message dated 11/22/2009 1:03:25 PM Eastern Standard Time, harrywitmore@witmore.net writes:

http://www.cloudjungle.com/CloudJungle/Araceae/Unknown/Aroid_1_1.

Harry, since it was collected in Panama it surely is a Monstera...but which, I don't know. Neat plant though.

Thanks,

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From: Jonathan Ertelt <jonathan.ertelt at vanderbilt.edu> on 2009.11.23 at 08:01:55(20358)
Harry,

I don't know the plant though I didsee some similar things in Panama, and have one with round leavesinstead of heart-shaped growing in one of my terraria right now that Idon't think I have an i.d. on.

Speaking of id's, in your"unknowns" among your albums, #1 Columnea arguta, #2orchid, #6 Aeschynanthus, #8-9 Ericaceous, though not sure on genus -Macleania or some close related epiphytic Ericad, #11 I don't have aclue but it looks neat - I'd like to get a piece at some point. Thereare also a couple of Begonia spp. I'd be interested in, including thatblue-leaved species that was the topic of a thread some time back now.But these things can wait.

In your gesneriad grouping, under the unknowns: #1&2Chrysothemis pulchella, #3 Columnea purpreovittata (spelling?) and #4looks like Aeschynanthus micranthus or one of the ones that wascirculating as such.

Have a wonderful Thanksgiving.

Jonathan

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From: Steve Marak <samarak at gizmoworks.com> on 2009.11.23 at 23:20:44(20360)
Harry & Jonathan,

#2, the orchid, looks like perhaps Trichotosia gracilis to me.

Cute, in any case.

Steve

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From: "Harry Witmore" <harrywitmore at witmore.net> on 2009.11.24 at 04:23:51(20362)
I have had another person send me a note off list saying the same thing. I haven't located a list of Philos in the subgenus yet but it helps.

Steve, I'm pretty sure this is not hederaceum or not like any of the many clones I have had. I haven't had any with a petiole like this one.

Michael, these are all the same plant although the first picture does look very much like a Monstera the rest of the plant doesn't look like any I have seen.

Thanks for the id's Jon and Steve. I forgot that folder existed.

Harry Witmore

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From: "Tom Croat" <Thomas.Croat at mobot.org> on 2009.11.24 at 09:34:39(20364)
Dear Harry:

This is Philodendron subgen.Pteromischum. I have forwarded it to Mike Grayum, the expert on this group inhopes he can determine it in this state. It looks a lot like P.auranitiifolium, I think, but there are quite a number that are similar.

Tom

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From: Peter Boyce <phymatarum at googlemail.com> on 2009.11.25 at 21:47:00(20370)
Hi Harry, has Tom commented on it? It's definitely NOT hederaceum/scandens/micans, which have a very short petiolar sheath and an otherwise terete petiole; the venation is wrong for Monstera

Pete

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From: "Marek Argent" <abri1973 at wp.pl> on 2009.11.29 at 09:21:19(20372)

Hello Harry,

Similar petiole sheathes you can observe in juvenile forms of many Philodendron species.

The very first leaves from a new stem often emerge from petiole sheathes,

they unfold faster than the typical adult and adolescent leaves emerging from cataphylls.

For a plant growing in the wild it is important to grow fast in the first stage of its life.

I append photos of my Ph. bipennifolium juvenile cutlings.

Best,

Marek

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From: "Tom Croat" <Thomas.Croat at mobot.org> on 2009.12.02 at 09:07:00(20374)
Dear Marek: Do know the source of origin ofyour collection? I am just trying to figure out how reliable the determinationis.

Tom

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From: "Tom Croat" <Thomas.Croat at mobot.org> on 2009.12.02 at 09:12:49(20375)
Dear Pete, Harry:

Yes, I have commented on it. I said that I thought it was Philodendron subgen. Pteromischum and still dobelieve it is that despite Mike Grayum’s belief that it might not be. Ihave seen material exactly like this. No name, of course. Many of thesebuggers are new and you could never name one without flowers.

Tom

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From: "Harry Witmore" <harrywitmore at witmore.net> on 2009.12.03 at 03:53:54(20379)
Thanks to all for the leads. I guess I need to yank this thing from the terrarium and grow it in the greenhouse to see if it will mature a bit and maybe flower. I wish I had more information about it but I have not been able to even find out who or where it came from. Just that it was from Panama which Mike noted is not much to go on.

Harry Witmore

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From: "Marek Argent" <abri1973 at wp.pl> on 2009.12.03 at 07:55:01(20381)
Dear Tom,

The origin of the collection - it was growing in a pot in a school library about 10 years ago, I asked for a cutling. I doubt if they still have it, it grows very poorly at my home. In spite of being tied to a coconut stalk, its leaf blades never have been longer than 15 cm and its stem is very brittle. Do you need any other detailed photos?

I'm rather sure this is the same species as here:

http://www.aroidpictures.fr/LYON/philobipennifolium.html

Marek

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