いろは紅葉 (iroha-momiji), the Japanese maple, gets its name from something wonderfully playful. Children once counted its 5-7 leaf lobes using the syllables of Japan's most famous poem: い、ろ、は、に、ほ、へ、と. The Iroha poem, written over a thousand years ago, contains every syllable of the Japanese writing system exactly once. A literacy lesson hiding in every leaf. The kanji 紅 (crimson) combines silk (糸) with work (工).