Abstract
The taxonomic classification of dwarf mistletoes ( Arceuthobium spp., Viscaceae) in series Campylopoda requires a multi-trait approach, integrating plant genetics, morphologies, and phenologies as well as their host and geographic distributions. Thus, competing interpretations on the contribution of these traits to defining species and subspecies boundaries has spurred considerable debate. Accordingly, the recent reclassification of 12 previously recognized species in ser. Campylopoda to separate subspecies of Arceuthobium campylopodum in the Flora of North America (FNA) has furthered this debate. We contend that these taxa deserve separate species recognition, while subspecies described prior to and after the recombination of ser. Campylopoda taxa in the FNA also deserve recognition. Herein, we provide evidence that the treatment in the FNA does not adequately reflect the diverse morphological, geographic, host, and phenological differences across the series, and hence, we maintain that the reclassification of ser. Campylopoda taxa was not justified according to empirical evidence published prior to and following the FNA treatment. We conclude our critique of the FNA treatment of ser. Campylopoda by advocating for the continued application of the Hawksworth and Wiens’ classification system, with minor modifications to the constitution of the series.
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Claims 5
Claim · model-written summary
The authors contend that the taxa of Arceuthobium series Campylopoda deserve separate species recognition.
- Taxon
- Arceuthobium
Arceuthobiumt0 - Outcome
- separate species recognitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arceuthobium campylopodum complex”
e0“We contend that these taxa deserve separate species recognition”
Claim · model-written summary
Subspecies described before and after the FNA recombination of series Campylopoda taxa also deserve recognition.
- Taxon
- ArceuthobiumArceuthobiumt0
- Outcome
- deserve recognitione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arceuthobium campylopodum complex”
e1“subspecies described prior to and after the recombination of ser. Campylopoda taxa in the FNA also deserve recognition”
Claim · model-written summary
The FNA treatment does not adequately reflect the morphological, geographic, host and phenological differences across the series.
- Taxon
- ArceuthobiumArceuthobiumt0
- Outcome
- diverse morphological, geographic, host, and phenological differences across the seriese2
- Direction
- does not adequately reflecte2
- Comparator
- treatment in the FNAe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arceuthobium campylopodum complex”
e2“the treatment in the FNA does not adequately reflect the diverse morphological, geographic, host, and phenological differences across the series”
Claim · model-written summary
The reclassification of series Campylopoda taxa was not justified by the empirical evidence published before and after the FNA treatment.
- Taxon
- ArceuthobiumArceuthobiumt0
- Outcome
- reclassification of ser. Campylopoda taxae3
- Direction
- was not justifiede3
- Comparator
- empirical evidence published prior to and following the FNA treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arceuthobium campylopodum complex”
e3“the reclassification of ser. Campylopoda taxa was not justified according to empirical evidence published prior to and following the FNA treatment”
Claim · model-written summary
The authors advocate continued use of the Hawksworth and Wiens classification system, with minor modifications.
- Taxon
- ArceuthobiumArceuthobiumt0
- Outcome
- continued application of the Hawksworth and Wiens’ classification systeme4
- Qualifier
- minor modifications to the constitution of the seriese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arceuthobium campylopodum complex”
e4“advocating for the continued application of the Hawksworth and Wiens’ classification system, with minor modifications to the constitution of the series”