Claim · model-written summary
A fourth flowering group of Arceuthobium is intermediate between the first and second groups.
- Taxon
- Arceuthobium
Arceuthobiume0 - Outcome
- fourth groupe7
- Qualifier
- intermediate between the first and second categoriese7
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chromosome numbers and other karyological features of Arceuthobium are reported for all species and subspecific groups in the United States and 7 of the 13 entities occurring in Mexico”
e7“A fourth group is intermediate between the first and second categories”
Title
CHROMOSOMAL AND FLOWERING CHARACTERISTICS IN DWARF MISTLETOES (ARCEUTHOBIUM)
Delbert Wiens American Journal of Botany 1968. doi:10.1002/j.1537-2197.1968.tb07384.x
Other claims from this paper (9)
- Observation Arceuthobium has the only known chromosome number in the genus, n = 14.
- Observation The karyotype of Arceuthobium appears fundamentally symmetrical.
- Association Bivalents in Arceuthobium are significantly smaller than in the related genus Phoradendron.
- Observation No supernumerary chromosomes were observed in Arceuthobium.
- Mechanism Strong isolating mechanisms are advanced as a possible, hypothetical explanation for the absence of polyploidy in dwarf mistletoes.
- Observation The flowering characteristics of American Arceuthobium species fall into three principal groups.
- Observation Group 1 Arceuthobium species flower in winter and early spring and have southern distributions.
- Observation Group 2 Arceuthobium species flower in summer and have more northerly distributions.
- Observation Group 3 Arceuthobium species flower in spring at the highest latitudes but essentially complete floral development the previous summer.