Senior Invertebrate Ecologist/ Taxonomist
((,///////////=======<
EcoAnalysts, Inc.
1.530.756.4481
1.530. 383.4798 (cell)
1307 "L" Street
Davis, CA 95616
USA
?Invertebrate Taxonomy
?Endangered Species
?Ecological Studies
?Bioassessment
?Invasive Species
?Plankton
?Phycology
Moscow, Idaho ? Bozeman, Montana ? Davis, California ? Joplin, Missouri
Selinsgrove, Pennsylvania
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From: aroid-l-bounces at gizmoworks.com [mailto:aroid-l-bounces at gizmoworks.com]
On Behalf Of Peter Boyce
Sent: Monday, June 23, 2008 3:10 AM
To: Discussion of aroids
Subject: Re: [Aroid-l] Fw: Schismatoglottis species
Colocasia & Xanthosoma, & Alocasia (for the most part), have very
distinctive 'colocasioid' venation with primary veins running pinnately off
both sides of the mid-rib with the secondary veins arising from the primary
veins and uniting between the primary veins into more-or-less sinuous
interprimary collective veins. I have attached a photograph of this typical
'colocasioid' venation. No Schismatoglottis have such venation, although the
aptly named S. colocasiodea approaches it (see attached image). An
additional problem is that not all Alocasia have 'colocasioid' venation and
a much more reliable method in differentiating Alocasia is that there are
glands, often waxy, in the axils of the primary veins on the abaxial side of
the leaf; these glands are never present in Schismatoglottis.
Additional useful characters are that Xanthosoma and Colocasia both have
slightly to very milky latex from cut tissue. A few Alocasia have milky
latex (A. macrorrhizos) for example, but for the most part the say is clear.
Hope this helps some
Peter
----- Original Message -----
From: Christopher Rogers
To: 'Discussion of aroids'
Sent: Sunday, June 22, 2008 11:17 AM
Subject: Re: [Aroid-l] Fw: Schismatoglottis species
Wow. Okay, so is there an easy way to separate Schismatoglottis, Alocasia,
Colocasia and Xanthosoma just by the leaves?
D. Christopher Rogers
Senior Invertebrate Ecologist/ Taxonomist
((,///////////=======<
EcoAnalysts, Inc.
1.530.756.4481
1.530. 383.4798 (cell)
1307 "L" Street
Davis, CA 95616
USA
?Invertebrate Taxonomy
?Endangered Species
?Ecological Studies
?Bioassessment
?Invasive Species
?Plankton
?Phycology
Moscow, Idaho ? Bozeman, Montana ? Davis, California ? Joplin, Missouri
Selinsgrove, Pennsylvania
ecoanalysts.com
From: aroid-l-bounces at gizmoworks.com [mailto:aroid-l-bounces at gizmoworks.com]
On Behalf Of Peter Boyce
Sent: Friday, June 20, 2008 2:14 PM
To: Discussion of aroids
Subject: [Aroid-l] Fw: Schismatoglottis species
Hi Leyland,
I think that the server may have stripped the image; am resending.
Pete
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