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.
Bhutanâs national flower, Meconopsis Grandis, or Himalayan blue poppy as is it popularly known, is a flower so enchantingly blue that it instantly commands undivided attention. Growing only above the tree line in a harsh high altitude environment of 3,500m to 4500m, it blooms just once during the monsoon between late May to July, after which it disperses its seeds and dies.