Cyanastrum cordifoliumCyanastrum cordifolium at a glance: Cyanastrum cordifolium is a compact tropical understory plant that pairs glossy, heart shaped leaves with small blue violet flowers that appear close to the foliage instead of towering above it. The overall effect is lush but controlled, which makes it especially useful for humid shelves, terrariums, and smaller tropical displays where oversized leaves would overwhelm the space. It has a quieter presence than louder