Plant ID forum: Philodendron ornatum

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Name: Myriam
Ghent, Belgium (Zone 8a)
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bonitin
Feb 28, 2015 1:17 AM CST
I didn't manage to find an id for this wild beauty growing by the river.
The closest I found was Philodendron ornatum , but the shape and the veinage are not really a match.
http://fm2.fieldmuseum.org/plantguides/view.asp?chkbox=20469



Another plant on another location..one that looks closer to Philodendron ornatum..?


Name: Janet Super Sleuth
Near Lincoln UK
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JRsbugs
Feb 28, 2015 10:12 AM CST
Did you see the other photo of P. ornatum on Flora do Brasil Myriam? It shows the leaf stalk which has lots of red bumps on it.

http://floradobrasil.jbrj.gov.br/jabot/listaBrasil/ConsultaP...

I've gone through the list for Rio, P. ornatum is the only one which comes close! There's often unnamed species but in such a popular area you would think they had all been named by now.

There's a photo on MOBOT ..

http://www.mobot.org/mobot/photoessays/largephotoessay.asp?f...
Name: Myriam
Ghent, Belgium (Zone 8a)
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bonitin
Feb 28, 2015 10:35 AM CST
No I hadn't seen the pics of Philodendron ornatum on the Flora do Brasil, Janet, usually they don't have photos..
It's true Philodendron ornatum is really the closest match and the only possible for the region; I guess some slight variations in species can occur..
I had seen the photo on MOBOT during my search, but was still doubting, the flower shown there is a beauty!
I think I'll close this as solved!
Thank You! for your assistance! Smiling
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
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eclayne
Mar 4, 2015 9:16 PM CST

Moderator

Myrian, these are some great photos of P. ornatum.
Evan
Name: Myriam
Ghent, Belgium (Zone 8a)
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bonitin
Mar 5, 2015 12:28 AM CST
Thank You!
Name: Tiffany
Opp, AL (Zone 8b)
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purpleinopp
Mar 5, 2015 8:41 AM CST
Whatever it is, it's absolutely gorgeous!

Sorry, this is kind of sidebar, but it looks like this is a Philodendron with a geniculum on the petiole? I'd read on Exotic Rainforest in the past that Philodendron (as a genus) doesn't have a geniculum, but was informed in another discussion that some Philos do have a geniculum and that the presence or absence of that feature can't be used to automatically include or eliminate Philo when trying to ID a mystery plant.

It's not always easy to know if one is seeing a geniculum or not, in pics. I'm trying to learn more about recognizing them, and what plants might have that. What are folks' thoughts about whether or not the reddish and slightly swollen area on the petioles of the plant shown here is a geniculum? TIA!
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Name: mj
Central Florida
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mjsponies
Mar 5, 2015 9:02 AM CST
Tiffany, not a 100 % certain but I think you might be thinking of Anthurium.


Thumb of 2015-03-05/mjsponies/879f18

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Name: Tiffany
Opp, AL (Zone 8b)
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purpleinopp
Mar 5, 2015 3:05 PM CST
TY. If I've been informed correctly, all Anthuriums have a geniculum, as do Spathiphyllums, Monsteras.

Trying to investigate, one encounters picture-less paragraphs like this:
http://e-monocot.org/taxon/urn:kew.org:wcs:taxon:344584

Philo swartiae:
https://www.chicagobotanic.org/downloads/staff/yates/new_spe...

Trying to find a pic of a Philodendron geniculum has proved fruitless. Reading the descriptions, they don't all have the distinct line that can be so noticeable on Anthurium.
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Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
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eclayne
Mar 5, 2015 3:18 PM CST

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Tiffany, this page describes the geniculum in P. subg. Philodendron. "...A geniculum is typically not apparent, but the genicular area serves the same purpose as it does in Anthurium..."
http://www.aroid.org/genera/philodendron/petioles.php
Evan
Name: Tiffany
Opp, AL (Zone 8b)
Houseplants Organic Gardener Composter Region: Gulf Coast Miniature Gardening Native Plants and Wildflowers
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purpleinopp
Mar 6, 2015 8:13 AM CST
TY. Yes, I've read that too. This sentence is intriguing, "...rarely with a conspicuous geniculum." Which implies that sometimes it is conspicuous. If so, the search words I've tried failed to find any pics to help educate my eyes.

"Usually the genicular area is somewhat firmer than the remainder of the petiole and sometimes it is differently colored but it is usually neither swollen nor so conspicuously distinct as in Anthurium. Typically the genicular area is the same shape as the remainder of the petiole, but sometimes the cross-sectional shape is different, being more frequently bluntly ribbed and often rather deeply cracked or scurfy around the circumference (perhaps owing to the bending in relation to changes in light). The geniculum, when apparent is sometimes thicker than the remainder of the petiole as in P. brunneicaule, P. ferrugineum, P. heleniae, P. tenue. It may be darker than the petiole as sometimes in P. bakeri or P. glanduliferum or slightly paler as in P. ferrugineum or P. scalarinerve."

This sounds like it could apply to the original plant of this discussion. The petiole changes color and shape as it joins the leaf.
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