epidermis morphology trait epidermis stratum basale morphology trait columnar layer morphology trait Any measurable or observable characteristic related to the shape, structure, color, or pattern of the deepest layer of the epidermis, which is composed of dividing stem cells and anchoring cells. stratum germinativum morphology trait palisade layer morphology trait stratum basale epidermis morphology trait VT:0001231 stratum cylindricum morphology trait germinative layer morphology trait basal layer morphology trait Trait.ontology