Claim · model-written summary
The same species have lignotubers whose cambium produces inward contorted xylem and outward phellem.
- Organ / stage
- lignotuberse0
- Outcome
- contorted xylem (mostly vessels) to the inside, phellem toward the outsidee0
StylidiumNot reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same species have lignotubers in which a cambium produces contorted xylem (mostly vessels) to the inside, phellem toward the outside.”
t0“Stylidium”
Title
Types of Cambial Activity and Wood Anatomy of Stylidium (Stylidiaceae)
Sherwin Carlquist American Journal of Botany 1981. doi:10.2307/2443182
Other claims from this paper (8)
- Observation Three cambial activity types, including two previously unreported types, were described in Stylidium.
- Observation Four species of sect. Rhynchangium have woody cylinders in upright stems.
- Observation In these species, cambium beneath the endodermis produces a limited inward quantity of fibers, vessel elements and interxylary phloem strands, with no outward derivatives.
- Observation Cambium in S. glandulosum produces indefinite inward xylem and interxylary phloem but nothing outward.
- Observation Cambium in S. laricifolium produces indefinite inward xylem and interxylary phloem but nothing outward.
- Observation The xylem lacks rays and axial xylem parenchyma.
- Observation The three cambial modes are interpreted as innovations within Stylidiaceae.
- Mechanism The family is inferred to have wholly herbaceous ancestry from the lack of cambial activity in vascular bundles.