11 letters · 16 points in Scrabble
originFrom translingual Grandiflora, from New Latin grandiflōra, the feminine form, following the feminine gender of rosa (“rose”), of grandiflōrus (“having large flowers”), from grandis (“large”) + flōs (“flower”, stem flōr-) + -us (suffix forming adjectives; feminine -a).
Etymology from Wiktionary, CC BY-SA 3.0