Papus or Pappus: How To spell?
The word Papus is misspelled against Pappus, a noun meaning "The hairy or feathery appendage of the achenes of thistles, dandelions, and most other plants of the order Compositae; also, the scales, awns, or bristles which represent the calyx in other plants of the same order."
Pappus has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings pa & us which should not be misspelled with single 'P'
Wrong Spelling:  pa-p-us  Correct Spelling:  pa-pp-us 
Check more misspelled words of Pappus to spell it correct.