Claim · model-written summary
Marginal parenchyma at the limit of annual rings may extend beyond it and be more plentiful than ray tracheids in Cedrus.
CedrusNot reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The medullary rays of Cedrus are provided with a margin which varies greatly in composition”
e2“Marginal parenchyma when present occurs at the limit of annual rings, and may also extend beyond this point so as to be more plentiful than ray tracheids”
Title
M. A. Chrysler Botanical Gazette 1915. doi:10.1086/331569
Other claims from this paper (4)
- Observation The medullary rays of Cedrus have a margin whose composition varies greatly.
- Mechanism The constant occurrence of marginal parenchyma at annual ring limits, with its connection to resin cells, indicates that parenchyma has replaced tracheids in resin secretion in Cedrus.
- Observation The marginal cells in Cedrus show distinct evidence of a degenerating condition.
- Observation The medullary ray structure places Cedrus as intermediate between Pinus and Abies.