|—n , pl pappi|
|a ring of fine feathery hairs surrounding the fruit in composite plants, such as the thistle; aids dispersal of the fruits by the wind|
|[C18: via New Latin, from Greek pappos grandfather, old man, old man's beard, hence: pappus, down]|
|pappus (pāp'əs) Pronunciation Key
Plural pappi (pāp'ī)
A structure made of scales, bristles, or featherlike hairs that is attached to the seeds (called cypselae) of plants of the composite family and that aids in dispersal by the wind. The downy part of a dandelion or thistle seed is a pappus. The pappus is derived from a modified calyx.