Inflorescence - Peduncle

[Steve Manning]

At 02:45 PM 12/6/2004 -0600, Susan Farmer wrote:
>On Mon, 6 Dec 2004 12:41:36 -0500, Richard Jensen <rjensen at SAINTMARYS.EDU>
>wrote:
>
>*snip*
>
> >
> >I see nothing in your model that answers the question posed: what is a
>peduncle?  If we have an inflorescence, is the peduncle part of the
>inflorescence or is it part of the shoot supporting the inflorescence?  Is
>there some biological reality that would allow me to refere to one shoot as
>a peduncle and another as a stem (or branch, twig, etc.) and know that I am
>referring to two different structures?  Agreeing on terminology is not the
>same as agreeing on homology and proper comparisons of taxa require that the
>comparisons be based on perceived homologies.
>
>And to muddy the waters even further, if you have a solitary infloresence,
>does that mean that the peduncle and the pedicel are the same thing?  Which
>term would be preferred in that case?

It has been my perception that in the case of solitary flowers  the name
"peduncle" pre-empts the name "pedicel" and nothing would be called the
pedicel.  But in an inflorescence, solitary or not, the peduncle, if any,
subtends the inflorescence and any branches at or above the first node
within the inflorescence would be called pedicels.


>Susan (who searches for the answer to what are those large, green things on
>a Trillium plant called -- leaves or bracts .....)
>-----
>Susan Farmer
>sfarmer at goldsword.com
>Botany Department, University of Tennessee
>http://www.goldsword.com/sfarmer/Trillium
>
> >
> >Cheers.
> >
> >Dick
> >
> >"Paterson, Trevor" wrote:
> >
> >> This issue is a very old chestnut:
> >>
> >> Unless people suscribe to a shared terminology (i.e. agree shared
>definitions of  structures, states, measurement units etc.) they will never
>be able to share  and compare data meaningfully.
> >>
> >> We have a paper coming out in Taxon soon about this, and a rather more
>technical/computer modelling paper available online:
> >>
> >> Paterson, T., Kennedy, J.B., Pullan, M.R., Cannon, A., Armstrong, K.,
>Watson, M.F., Raguenaud, C., McDonald, S.M., Russell, G.: A Universal
>Character Model and Ontology of Defined Terms for Taxonomic Description.
>Proc. Data Integration in the Life Sciences (DILS 2004) (ed. E. Rahm) in:
>Lecture Notes in Bioinformatics 2994 (2004) pp63-78
> >>
> >>
>http://www.dcs.napier.ac.uk/~prometheus/prometheus_2/publications/Paterson_etal_DILS.pdf
> >>
> >>
> >> Trevor Paterson PhD
> >> t.paterson at napier.ac.uk <mailto:t.paterson at napier.ac.uk>
> >>
> >> School of Computing
> >> Napier University
> >> Merchiston Campus
> >> EDINBURGH
> >> EH10 5DT
> >> Scotland UK
> >>
> >> tel:          +44 (0)131 455-2752
> >>
> >> www.dcs.napier.ac.uk/~cs175
> >> <http://www.dcs.napier.ac.uk/~cs175> www.prometheusdb.org
><http://www.prometheusdb.org>
> >>
> >> >-----Original Message-----
> >> >From: Taxacom Discussion List [mailto:TAXACOM at LISTSERV.NHM.KU.EDU]On
> >> >Behalf Of Richard Jensen
> >> >Sent: 06 December 2004 16:06
> >> >To: TAXACOM at LISTSERV.NHM.KU.EDU
> >> >Subject: Re: [TAXACOM] Inflorescence - Peduncle
> >> >
> >> >
> >> >Curtis Clark wrote:My general tendency is to call everything
> >> >basal to the
> >> >pedicels and
> >> >
> >> >> terminal to the first foliage-leaf-bearing node the
> >> >peduncle, but it's
> >> >> worth noting that the stalk of a grass spikelet, tecnically
> >> >a peduncle,
> >> >> is usually called a pedicel.
> >> >
> >> >If the stalk of the individual spikelet is a pedicel, then
> >> >what is the stalk
> >> >of the entire inflorescence?  And, what about grasses that have
> >> >single-flowered spikelets, e.g., Zizania?  Is the stalk of the
> >> >spikelet then
> >> >a pedicle and the stalk of the inflorescence a peduncle?
> >> >
> >> >A grain of wisdom would come in handy about now.
> >> >
> >> >Dick
> >> >
> >> >Dick
> >> >--
> >> >Richard J. Jensen              | tel: 574-284-4674
> >> >Department of Biology      | fax: 574-284-4716
> >> >Saint Mary's College         | e-mail: rjensen at saintmarys.edu
> >> >Notre Dame, IN 46556    | http://www.saintmarys.edu/~rjensen
> >> >
> >
> >--
> >Richard J. Jensen              | tel: 574-284-4674
> >Department of Biology      | fax: 574-284-4716
> >Saint Mary's College         | e-mail: rjensen at saintmarys.edu
> >Notre Dame, IN 46556    | http://www.saintmarys.edu/~rjensen

Dr. Steve Manning
Arkansas State University--Beebe
Mathematics and Science
Professor of Biology
P.O. Box 1000
Beebe, AR  72012
Phone: 501-882-8203
Fax: 501-882-4437