Plant ID forum: Can I safely say this is a Xanthosoma sp.?

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Name: Myriam
Ghent, Belgium (Zone 8a)
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bonitin
May 24, 2014 6:08 AM CST
It cannot be an Alocasia as this genus doesn't occur in Brazil.

There are 4 species of Xanthosoma registered in the Atlantic rainforest of the Rio de Janeiro state.

Xanthosma maximilianii
Xanthosoma pentaphyllum
Xanthosoma taioba
Xanthosoma riedelianum

It is none of the first 3, unfortunately I cannot find any photos or even herbarium species of X.riedelianum on the web.

The plant was growing in the shade on a very steep, almost vertical slope with a stream underneath heading to the river. It was difficult to take good photos as I had to stand on the crumbling edge of the slope, the plant was tall, and I found the leaf shape interesting, different from the other species I've met during this trip or my previous trip 4 years ago.

I'm not entirely sure but I think it had the beginning of an inflorescence coming up. A pity I couldn't come closer by and take better and more detailed shots.
In the hope to find a bloom about week later, I returned to the same spot, but alas the poor plant had been destroyed by a heavy monsoon, it had probably been washed down and taken by the stream. What a shame! Sad
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Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
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JRsbugs
May 24, 2014 7:30 AM CST
I searched for the subspecies of Xanthosoma brancoanum which (Xanthosoma riedelianum var. brancoanum) is listed as a synonym of Xanthosoma riedelianum on the Plant List Myriam.

http://www.theplantlist.org/tpl1.1/search?q=Xanthosoma+riede...

I found a specimen of that which is on Kew, you can't enlarge it but it doesn't look correct.

http://plants.jstor.org/specimen/k000400707

There's drawings of leaf shapes of Xanthosoma species on plantillustrations, you can see how difficult it is..

http://plantillustrations.org/illustration.php?id_illustrati...
Name: Lin
Florida (Zone 9b)
Region: United States of America Morning Glories Region: Florida Houseplants Charter ATP Member I was one of the first 300 contributors to the plant database!
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plantladylin
May 24, 2014 7:42 AM CST
Found this when googling re: Xanthosoma riparium:

http://www.cabdirect.org/abstracts/20001613873.html;jsession...

http://www.jstor.org/discover/10.2307/3393179?uid=3739600&ui...

And, this says Xanthosoma sagittifolium grows in Brazil:

http://www.ncbi.nlm.nih.gov/pubmed/22468879
~ Eat, Sleep .... Play in the dirt ~
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
Image
bonitin
May 24, 2014 7:59 AM CST
Thanks Janet! Smiling No it doesn't look like the herbarium sp on Kew of Xanthosoma riedelianum.
I know it would be very difficult, but can I call it Xanthosoma sp. or are there other genera that could be candidate?
[Last edited by bonitin - May 24, 2014 8:05 AM (+)]
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Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
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bonitin
May 24, 2014 8:03 AM CST
Thanks Lin, I'm sure it isn't Xanthosoma saggitifolium and Xanthosoma riparium (Central Brazil) has not been registered in the place I was which is the South-East of Brazil at least according to the Flora do Brasil.
Name: Lin
Florida (Zone 9b)
Region: United States of America Morning Glories Region: Florida Houseplants Charter ATP Member I was one of the first 300 contributors to the plant database!
Garden Procrastinator Birds Butterflies Bee Lover Hummingbirder Container Gardener
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plantladylin
May 24, 2014 8:20 AM CST
This site says X. sagittifolium is popular in several states in Southeastern Brazil: http://www.worldcrops.org/crops/Taioba.cfm but I guess it's not a native.

Maybe you can put your photo's in the general Xanthosoma entry in the database until you can get an exact ID.
~ Eat, Sleep .... Play in the dirt ~
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
Image
bonitin
May 24, 2014 8:35 AM CST
Yes I know Lin, Xanthosoma sagittifolium is also growing in the place I was and I had already submitted photos of that plant from my previous trip, but the plant I posted here is really different and cannot be it.
I was planning to put the photos into the general Xanthosoma page but wanted to make sure it is the correct genus. Smiling
Name: Lin
Florida (Zone 9b)
Region: United States of America Morning Glories Region: Florida Houseplants Charter ATP Member I was one of the first 300 contributors to the plant database!
Garden Procrastinator Birds Butterflies Bee Lover Hummingbirder Container Gardener
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plantladylin
May 24, 2014 8:45 AM CST
It sure is pretty and looks to have the form and growth habit of Xanthosoma. I love that tall (Bird of Paradise?, Palm?, Musa?) plant growing in the background too! Lovey dubby
~ Eat, Sleep .... Play in the dirt ~
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
Image
bonitin
May 24, 2014 9:17 AM CST
It is Musa paradisiaca Lin, native to Brazil.
I love banana trees, they are very beautiful, so generous to so many species of wildlife! Smiling
Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
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JRsbugs
May 24, 2014 9:22 AM CST
bonitin said:Thanks Janet! Smiling No it doesn't look like the herbarium sp on Kew of Xanthosoma riedelianum.
I know it would be very difficult, but can I call it Xanthosoma sp. or are there other genera that could be candidate?


To me, it looks like a Xanthosoma sp., the leaves are very similar to the line drawings. If it turns out to be something else it can be moved but I doubt it is something else.
Name: Myriam
Ghent, Belgium (Zone 8a)
Charter ATP Member Ferns Native Plants and Wildflowers Cat Lover Birds Bee Lover
Organic Gardener I was one of the first 300 contributors to the plant database! Frogs and Toads Plant Identifier
Image
bonitin
May 24, 2014 10:46 AM CST
Thanks Janet, Xanthosoma sp. it will be for now.. Smiling


Name: Janet Super Sleuth
Near Lincoln UK
Charter ATP Member Organic Gardener Garden Photography Bee Lover Dragonflies Cat Lover
Butterflies Birds Plant Identifier I was one of the first 300 contributors to the plant database! Spiders!
Image
JRsbugs
May 24, 2014 10:51 AM CST
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