subtend

1.18(17) Inflorescence subtended by a broad, 2-keeled prophyll; rachilla internodes usually distinct and disarticulating.

花序被包着以一宽阔部分，2龙骨状；小穗节间通常清楚和脱节。

2.In the daisy family the numerous bracts which subtend the inflorescence are known as an involucre.

在菊科植物中，苞片数目多而聚生在花序，为总苞。