Herb of central and southern europe having purple florets .

欧洲中部和南部草本植物，有紫色小花。

Florets disarticulating from above downward , falling together with the rachilla joints .

脱节从在上面向下的小花，下降以及具关节的小穗轴。

Why are the florets in a sunflower arranged in a double spiral ?

向日葵花瓣为什么是双螺旋排列？

Class 11 spider : long tubular ray florets which may coil or hook at the ends .

第十一型蜘蛛型：小花长管状，先端盘绕或弯曲。

The phenomenon of ear barren tip composed from aborted kernels and florets without fecundation at the tip of ear is an important factor causing yield losses .

玉米果穗顶部败育的籽粒和未受精的小花构成的秃尖现象是一个重要的减产因素。