Basic structure of dicotyledonous stem-Sunflower stem. Inner structure of dicotyledonous stem reveals epidermis, cortex and stele. Epidermis. Epidermis is protective in function and creates the outermost layer of the stem. Epidermis is a single layer of parenchymatous rectangular cells.
Culture. Plumbago is propagated from cuttings in the summer, but you can also grow it from seed. Plant plumbago in light, sandy, well-drained soils, spacing each shrub 36 to 60 inches apart to allow room to grow. If spaced properly, blue plumbago will naturally cascade in a fountain shape.
Tulip Poplar in mid summer. This fast growing, pyramidal shaped tree can grow 3 ft. or more per year. Tulip Poplar has yellow, tulip-shaped flowers with orange markings late spring.It will grow to 50 ft. tall and 30 ft. wide in rich, well drained soils and also in clay soils with adequate drainage or on hillsides.his fast growing, pyramidal shaped tree can grow 3 ft. or more per year. Tulip Poplar has yellow, tulip-shaped flowers with orange markings late spring.