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Is it really a Colocasia gigantea?

Posted by engaiauden (My Page) on
Fri, Aug 27, 10 at 12:39

Dear Sirs,

I am an Italian naturalistic writer and photographer and
I've bought a rhizome on E-Bay one month a go from a man who
said it belongs to a Colocasia gigantea he personally
collected in Asia.
Now I have a very small plant, but can you identify it?
Here are the pictures:
http://www.bananas.org/gallery/uploads/5325/DSC_3514.JPG
http://www.bananas.org/gallery/uploads/5325/DSC_3520.JPG
http://www.bananas.org/gallery/uploads/5325/DSC_3519.JPG
Is it really a Colocasia gigantea or it could be a more
common
Colocasia esculenta? What are the scientific characteristic
of a Colocaosia gigantea? Can you help me please?

Best regards
Stefano


Follow-Up Postings:

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RE: Is it really a Colocasia gigantea?

I realize it is often frustrating to not be able to ID a plant but in this case your plant is still too juvenile to make out the detailed features that are used for that purpose. It looks very much like a variety of forms of Colocasia esculenta but there are over 100 known forms so to offer an opinion would be little more than a guess.

I am posting the scientific description of the species so you can file it and as the plant matures begin to check the features against the plant.

The chances are high you will have to wait for the plant to grow fairly large to be certain. You may want to invest in a descent botanical dictionary to be able to understand some of the terms used in botanist Pete Boyce description.

Again, I am sorry not to be able to give you more assistance but attempting to ID most juvenile plants often results in a bad ID.

Steve

Colocasia gigantea (Blume) J. D. Hooker, Fl. Brit. India 6:
524. 1893.
Ұ da ye yu

Herbs, large to gigantic, evergreen, with massive, stout
epigeal stem. Leaves very large; petiole pale green, strikingly pruinose, to 2.5 m, proximal half sheathing; leaf blade white pruinose abaxially, especially when immature, green or pale green adaxially, ovate-cordate, 25C250 17C150 cm, membranous,base cordate, peltate, margin undulate, apex shortly acuminate. Inflorescences 5C13 arising from leaf axil (actually terminal on shoot and displaced by new shoot); peduncle pruinose, cylindric, 30C80 1C2 cm, each with a membranous cataphyllnearly equaling length of peduncle. Spathe 12C24 cm; tube green, ellipsoid, 3C6 1.5C2 cm; limb erect, white, oblongboat-
shaped, distinctly constricted, 8C19 2C3 cm. Spadix 9C
20 cm; female zone white or cream-colored, conic; sterile zone 3C4.5 cm, slender; male zone 5C14 cm; appendix very short, 1C5 mm, apex acute. Berry oblong, ca. 5 mm. Seeds many, fusiform, with many distinct longitudinal striations. Fl. AprCJun, fr. Sep. 2n = 28.

Valley forests, limestone-associated, usually on moist but welldrained sites, also cultivated; 100C700 m. Fujian, Guangdong, Guangxi, Jiangxi, Yunnan; cultivated in Anhui, Guizhou, Hunan, Sichuan, and Zhejiang [Cambodia, Laos, Malaysia (Peninsular), Myanmar, Thailand, Vietnam; widely cultivated in SE Asia].

The link below may help.

Here is a link that might be useful: Colocoasia esculenta


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