sentences:  "Pavetta" has small, white, tubular flowers, sometimes salviform or funnel-shaped with 4 spreading petal lobes.The flowers are carried on terminal corymbs or cymes.Two "Pavetta" species, "Pavetta harborii" and "Pavetta schummaniana", harbor endophytic "Burkholderia" bacteria in visible leaf nodules and are known to cause gousiekte, a cardiotoxicosis of ruminants characterised by heart failure four to eight weeks after ingestion of certain rubiaceous plants.