Despite their strong and interlinked root structure, the actual flowers were of a lowly order, though, canted towards the sun, they attracted the cordate butterflies.
-- Brian Wilson Aldiss, Hothouse
Without any wind blowing, the sheer weight of a raindrop, shining in parasitic luxury on a cordate leaf, caused its tip to dip, and what looked like a globule of quicksilver performed a sudden glissando down the center vein, and then, having shed its bright load, the relieved leaf unbent.
-- Vladimir Nabakov, Speak, Memory
Related to core, cordate comes from the Latin word for heart, cor, and the suffix -ate which forms an adjective from a noun.