abstract appearance edges erect flora frangipani green greenery in the garden ladder-like leaf leaves light nature New new growth patterns plants semi-tropical tips trees bracts devil's backbone drought tolerant flower flowers garden plant houseplant Jacob's ladder lady’s slipper pedilanthus tithymaloides pink plant pointed tips shaped like pink slippers shrub slipper flower sub-tropical succulent tropical unusual upright variegated zigzag plant zigzag stems