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  C. 'Fontanesii' id - Pete's id
From: tony at plantdelights.com (Tony Avent) on 2007.10.06 at 07:23:14(16408)
Peter:

I almost missed your note about C. 'Fontanesii' not being a form of C.
esculenta. Sorry to open a can of worms, but if it's not C. esculenta,
what is it and why?

Tony Avent

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From: botanist at malesiana.com (Peter Boyce) on 2007.10.07 at 03:48:50(16416)
Tony,

I am pretty sure that the 'Fontanesii' cultivar of C. esculenta is somewhere
in the gaoligongenis/lihengiae complex defined by glossy leaves and a
loosely stolonifeous habit combined with a short deep yellow spathe that
opens rather wide.

Very best

Peter

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From: tony at plantdelights.com (Tony Avent) on 2007.10.07 at 15:24:32(16420)
Pete:

I checked the flowers on our C. 'Fontanesii' and indeed the spathes do
open quite a bit wider than the C. esculenta cultivars that we grow.
Can you direct us to an article about the C.gaoligongenis/lihengiae
complex. We found plants in Vietnam that seem to resemble C.
gaoligongensis, but these look nothing like C. 'Fontanesii'. Please,
tell us more.

Tony Avent

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From: botanist at malesiana.com (Peter Boyce) on 2007.10.08 at 03:39:23(16424)
Tony,

There are a number of new taxa involved in this complex. I have seen some of
the mss (reviewed a couple) but not all. The refs are:

Colocasia gaoligongensis H.Li & C.L.Long -- Feddes Repert. 110(5-6): 423.
1999 (IK)
Colocasia gongii C.L.Long & H.Li -- Feddes Repert. 111(7-8): 559. 2000 (IK)
Colocasia lihengiae C.L.Long & K.M.Liu -- in Bot. Bull. Acad. Sin. (Taipei)
42(4): 313 (2001). (IK)
Colocasia tibetensis J.T.Yin -- Ann. Bot. Fenn. 43(1): 53 (-56; fig. 1).
2006 [13 Mar 2006]
Colocasia yunnanensis C.L.Long & X.Z.Cai -- Ann. Bot. Fenn. 43(2): 139
(-142; fig. 1). 2006 [26 Apr 2006]

In addition there are a couple of obscure names that need to be accounted
for:

Colocasia fontanesii Schott -- Oesterr. Bot. Wochenbl. 4: 409. 1854 (IK)
Colocasia formosana Hayata -- Icon. Pl. Formosan. 8: 133. 1919 [25 Mar 1919]
(IK)
Colocasia konishii Hayata -- Icon. Pl. Formosan. 8: 134. 1919 [25 Mar 1919]
(IK)
Colocasia kotoensis Hayata -- Icon. Pl. Formosan. 5: 247. 1915 [25 Nov 1915]
(IK)
Colocasia tonoimo Nakai -- in Ic. Pl. As. Or. iii. 231 (1940). (IK)

Very best
Pete

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From: botanist at malesiana.com (Peter Boyce) on 2007.10.08 at 04:03:34(16425)
Hi again Tony,

There are pdf files available on-line the original descriptions appearing in
Ann. Bot. Fennici and Bot. Bull. Acad. Sin. In addition, images of some are
on www.natureproducts.net and
http://221.130.190.61/biodiversity/showArticle.asp?a_id(7&keyword=

Very best

Peter

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From: tony at plantdelights.com (Tony Avent) on 2007.10.08 at 12:42:21(16429)
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From: botanist at malesiana.com (Peter Boyce) on 2007.10.10 at 23:18:48(16451)
Tony,

I have seen rather a few similar but different things labeled as Illustris. But my feeling is that this is C. fallax (including C. bicolor and C. heterochroma).

Pete

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From: tony at plantdelights.com (Tony Avent) on 2007.10.11 at 09:40:02(16455)
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From: botanist at malesiana.com (Peter Boyce) on 2007.10.12 at 15:53:57(16473)
Tony,

I am not saying it is 100%, all I can say is that types plants of heterochroma and bicolor that I have seen in China fall pretty incontrovertibly into fallax sens. lat. They are all notable for the pencil-diameter stolons that do not branch much, the thin-textured leaves that are often (but by not means always) dark-variegated and the rather dull yellow to prurpe-brwon-tinged inflorescences.

Into this stew you need to add C. affinis which in nature is readily identifiable by always grwoing on near-vertical mud waterfalls and river banks with flowing water and in nature and cultivation by the very slender (almost wire-thin) much branching stolons. Colocasia affinis is also USUALLY of much smaller stature than fallax sens lat. although big plants of afiinis can be larger and as robust as small-end fallax while large end fallax can be mistaken as rather weakend esculenta.

As to mlecular analyses of this group, as far as I am aware nothing is underway.

Very best

Peter

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From: tony at plantdelights.com (Tony Avent) on 2007.10.13 at 13:47:08(16485)
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From: botanist at malesiana.com (Peter Boyce) on 2007.10.15 at 23:33:46(16512)
Tony;

My 'thoughts' on esculenta still hold true (for me I hasten to add - am not trying to gain the truth high ground!); the real problem is, as ever, that esculenta has been cultivated (or at least managed) for a VERY long time and that without some pretty robust molecular work utilizing genes to investigate the phylogenetic as well as culton level it is exceedingly difficult to devise a reliable taxonomy. Colocasia bicolor is almost certainly not distinguishable from affinis.

'Illustris' would shoehorn into antiquorum.

As ever

Peter

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From: tony at plantdelights.com (Tony Avent) on 2007.10.16 at 05:14:21(16515)
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