Some strains of S marcescens are capable of producing a pigment called prodigiosin, which ranges in color from dark red to pale pink, depending on the age of the colonies.
Vascular Tissue: the xylem and phloem in leaves are confined to vascular bundles or veins. Veins are surrounded by a layer of cells call the bundle sheath. The bundle sheath can be composed of parenchyma, colenchyma, or fibers.
The vascular tissue in seedless vascular plants, like ferns, is made up of long,tube like cells. These cells carry water, minerals, and food to the cells throughout the plant. Non vascular plants like the moss are usually only a few cells thick.