help i.d. typhonium

Can anybody help me with this one? It's kept in water and about 6 ft tall including the pot. Thanks!

That's not Typhonium; that is Cyrtosperma. I had one like it but it never got as large as yours, and then the cold last winter took it out. They do like to sit in water and they don't like cold, not at all. However, I've heard that if the plant is sitting in a tray of heated water, cool air won't be as damaging to the plant, so long as the water remains heated.

LariAnn
Aroidia Research

Lari Ann got it!

It looks like Cyrtosperma cuspidispathum.

http://www.aroid.org/genera/speciespage.php?genus=cyrtosperma&species=cuspidispathum

Nice plant!

Thanks! My photo, professional owners.

Looks a definite C. cuspidispathum. This is mine, still a bit small though, about 50 centimetres. Seeing we're in winter now I don't think there'll be any growth for a while. Certainly not to 2 metres.

I just wanted to add another image of this plant from a 2006 thread.

http://davesgarden.com/community/forums/fp.php?pid=2789704

Scott

This message was edited Jun 7, 2010 8:27 AM

This message was edited Jun 7, 2010 8:27 AM

Is that at Selby? I have a pic that I took of C. cuspidispathum there that looks similar.

A photo I took in Papua New Guinea, similar to the first photo on this thread, particularly the colour. However, most likely it's Cyrtosperma kokodense which usually grows at higher altitude than C. cupidispathum.

Trbreeze, would that imply it prefers somewhat cool conditions? The display house at Selby is about 93F this time of year.
I could ask the water temp next visit.
Here's a C. johnstonii from a few years ago.

Kalpavriksha, altitude in the tropics, especially places like New Guinea, means a small temperature range and constant high humidity. Where the photo of (probably) C. kokodense was taken was somewhere around the 1000 metre level. Evolving around that altitude with a dense forest canopy makes those plants less tolerant of the higher temperatures and lower (variable) humidity of the lowlands. But C. cupidispathum is more of a lowland plant so it doesn't mind the higher temperatures.

I'm sticking with lowland Cyrtosperma, the temperatures stay constantly too hot here to spend time trying to make cooler weather plants survive. I have cupidispathum, merkusii and johnstonii

This is my C. johntsonii. The leaves are greener than the ones in your photo but the veining is red.

One of my favorite groups of plants. I have seen johnstonii 9 feet tall an impressive site. As well as the huge Merkusii which I have seen at 20 feet but have seen photos of much much larger plants. My one question is the next time at Selby see if they still have Dracontiodies growing. I lost my plant years ago and it is an extremely hard plant to get a hold of. I had grown it so well but a few mishaps in the greenhouse and these plants are gone forever it seems.


Here is a picture of my plant. A very odd aroid and I have only seen it in 2 places. I hope to get one again as I now have a much better heating system in the new greenhouses.

Brian, My Urospatha is still growing and will try to divide it when it gets some size this summer...probably around the first of July. Here is a pic of one of my C. cuspidispathum in bloom from a few years ago.

C. cuspidispathum at Selby

Here is Merkusii at Fairchild

C. cuspidispathum

I believe Julius and Bognor determined this one was a hybrid. Not sure who the parents are but. It was interesting to watch them discuss it. LOL.

Wow! I have enjoyed viewing this thread.

That's great. I can see where my cupidispathum is going - upwards!

This is my C. merkusii, very pot bound. I started on the pond that was going to be its home but the wet season beat me. The pond hole disappeared below a sheet of water and has only just dried out in the last few days. So when I get time I'll have to finish it. Hopefully before the plant bursts the pot it's in.

Brian-I'll ask Angel next time I'm there. I see your photo of C. cuspidispathum at Selby is in the same position as mine; the yellow heliconia is just above and to the right.
There's so much stuffed into the Tropical Display house, it's amazing.
Just from this one posting, I'm humbled at my nescience. I want proper i.d. of my photos so unless something blares out at me from the photographs at aroid.org, I'll be tapping everyone's expertice!

Alistair, never saw any flowers on it. The plant looked like it was on it's last legs with only one leaf left, end of season perhaps, if they have a period of dormancy.

For ID I was going by what you told me last year, about C. carrii being on the Sogeri Plateau and C. kokodense being along the Trail. I didn't get to Sogeri Plateau, but certainly made my acquaintences with the Trail.

I checked back on the original photo. Thought it had been taken near Mt Bellamy, but I was wrong. It was taken some 2 hours north of Imita Ridge, about an hour before Ioribaiwa. So somewhere near Ua Ule Creek, the altitude most likely 400 to 500 metres. Under a pretty dense canopy.

I am sure it must have been kokodense: the leaves look right and I think its the only Cyrtosperma there... I will have to go and look for myself one of these days. I always though it must be a particularly pretty species!

Here are a couple images of the Selby C. cuspidispathum from this past weekend.

Scott

Not the best image but...

last one