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E-mail from Bob Peet on 2012-10-3:
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Here are a few other cases to consider.
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1. We sometimes use composite taxa to correct for low resolution names or changes in concept. Here are some examples where we convert scientific names in old data to new names in the sense of Weakley 2011 (for example).
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Vaccinium corymbosum -> Vaccinium [caesariense + corymbosum + formosum]
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Viburnum dentatum -> Viburnum [dentatum + recognitum]
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Leucothoe -> [Agarista + Eubotrys + Leucothoe]
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Aster -> [Ampelaster + Aster + Doellingeria + Eurybia + Ionactis + Oclemena + Sericocarpus + Symphyotrichum]
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2. We sometimes have a real species that is not yet published: Allium sp #1.
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Other times we have a species in a genus and know nothing more: Allium sp.
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This gets complicated when we have two unknowns from one genus in a plot, with the result that Allium sp#1. Can here have a different and less consistent meaning and should be rendered as Allium sp., or just Allium.
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3. We sometime have informal codes for low resolution groups of taxa, but which are consistently defined, such as Carex {rfb} (aka Cared red-fibrous-bases) and Rubus {blackberry}.
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