The Collaborative International Dictionary
semifloret
Semifloscule \Sem"i*flos`cule\, n. (Bot.) A floscule, or florest, with its corolla prolonged into a strap-shaped petal; -- called also semifloret.
Wiktionary
semifloret
n. (context botany English) A floret, or floscule, with its corolla lengthened into a strap-shaped petal.