What is "bulbed"

Usage examples of "bulbed".

Heaving itself into a higher peak, it poised a moment, its bulbed stalks jerking about as if sniffing the air.

Foul face after face T'sais saw, and each burnt her brain until she thought she must scream and die — visages of leering eye, bulbed cheek, lunatic body, black faces of spiked nose, expressions outraging thought, writhing, hopping, crawling, the spew of the demon-lands.