Re: [aroid-l] Xanthosoma "roseum"
- Subject: Re: [aroid-l] Xanthosoma "roseum"
- From: "Eduardo Goncalves" firstname.lastname@example.org
- Date: Thu, 30 Jan 2003 00:01:36 +0000
Well, I couldn´t access the other pictures (a weird error message
appeared) but the "Xanthosoma sagittifolium" you showed is also X. robustum!
Believe, Xanthosoma sagiitifolium (if it really cultivated in USA) is pretty
rare!!!! In Lorenzi´s book "The tropical plants of Burle-Marx" there are
both species featured and I checked the ID personally, but the angle of the
picture is not good enough to show exactly the differences.
Grayum´s statement on Flora of CR is very accurate, and I agree with him
in almost anything. However, based on my experience cultivating those
beasts, Xanthosoma sagittifolium will never turn into X. robustum, even when
you allow it to grow fully. I have started both species, side by side, at
the same juvenile state, and they get different with time. On the top of
this, young plants are different too!
Anyhow, I do believe that Xanthosoma sagittifolium is a domesticated
"species" and it is possible that the original stock were gathered from
something within same evolutionary lineage of modern X. robustum. It seems
to have been selected from some neotenic individuals of the X. robustum
complex, because young specimens keep their starch-rich cormels instead of
the spongy adult stem. Even today, only young individuals of X. robustum
(malanga blanca) are harvested as food.
I have an article on cultivated Xanthosoma that I am preparing to be
published in Aroideana, with pictures of most cultivated species. I am
planning to release it this year, so I think a few things will get clear.
Very best wishes,
Thank you for that information. I appologize if no one is interested in
this subject, but I appreciate the
Here is a photo of X. sagittifolia and others that may be synonomous:
Xanthosoma robustum. To me, the leaves look too collected to be the plant
in the black and white photo of X.
roseum, but this is a younger plant? A leaf photo:
Xanthosoma roseum is refered to on one site (though it doesn't obviously
say which source this information
comes from) as 'rosey malanga' and 'elephant ear'. Xanthosoma
sagittifolium in various cultivated edible forms
is refered to as 'tiquisque blanco and tiquisque colorado'....in Costa
Rica. Eduardo, you mention that the
true form of X. sattifolium it is also refered to as 'malanga-blanca'. I'm
not sure what all this means but M.
H. Grayum says this in his description of Xanthosoma (You'll have to scroll
down to Xanthosoma where he
describes X. dealbatum; X. robustum; X. sagittifolium) site follows:
"Xanthosoma robustum is characterized by its erect, aerial stems, glaucous
foliage, naked posterior leaf ribs,
and uniformly greenish inner spathe tube surface. The infls. are the
largest of any CR Xanthosoma sp. This sp.
is most similar to X. undipes (with non-glaucous foliage and usually red
spathe tubes) and X. sagittifolium
(acaulescent and usually with winged posterior ribs). Indeed, the plants
treated here as X. robustum may prove
to represent merely robust individuals of X. sagittifolium."
X robustum and X. sagittifolium may end up being the same plant, but how
about X. roseum because he also says:
"Because the taxonomy and nomenclature of the cult. Xanthosoma are in such
chaos, a single, variable sp. is
here recognized, and the oldest available name is applied. Various
cultivars are represented in CR, e.g.,
tiquisque blanco and tiquisque colorado. Some names may prove to be
incorrecly synonymized here, such as
Xanthosoma roseum, typified by a Costa Rican collection".
So I guess it's X. sagittifolium that really I'm looking for? Wasn't the
black and white photo taken in Costa
Rica? I'd like to know more about the text book that included that photo
if anyone knows. Brian, if you find
one of these before I do, I'm available to sell to.
Thanks Eduardo, Michael, and Brian,
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