A further study published in 2009 included an extra species of Wikstroemia .
A further study published in 2009 suggested that this genus was paraphyletic with respect to Stellera , but otherwise agreed with the cladogram above .
A further study published in 2009 included an extra species of Wikstroemia and suggested that this genus was paraphyletic with respect to Stellera , but otherwise agreed with the cladogram above .