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.
biloba) grows nearly as tall at 60 to 70 feet high and 35 to 50 feet wide in USDA zones 5 through 8. Cucumber tree magnolia (M. acuminata) reaches 60 to 70 feet high with a spread of 35 to 50 feet.iloba) grows nearly as tall at 60 to 70 feet high and 35 to 50 feet wide in USDA zones 5 through 8. Cucumber tree magnolia (M. acuminata) reaches 60 to 70 feet high with a spread of 35 to 50 feet.