Wiktionary
heart-leaf
n. (alternative spelling of heartleaf English)
WordNet
Usage examples of "heart-leaf".
Side by side, two buds have been tossing jauntily in the breeze, often brought very near to each other, sometimes touching for a moment, with a secret thrill in their close-folded heart-leaves, it may be, but still the cool green sepals shutting tight over the burning secret within.