{If ye have} (ei echete). Condition of the first class,
assumed to be true. {Ye would say} (elegete an). Imperfect
active with an and so a conclusion (apodosis) of the second
class, determined as unfulfilled, a mixed condition therefore.
{Sycamine tree} (sukamin(9369)). At the present time both the black
mulberry (sycamine) and the white mulberry (sycamore) exist in
Palestine. Luke alone in the N.T. uses either word, the sycamine
here, the sycamore in  19:4 . The distinction is not observed in
the LXX, but it is observed in the late Greek medical writers for
both trees have medicinal properties. Hence it may be assumed
that Luke, as a physician, makes the distinction. Both trees
differ from the English sycamore. In  Mt 17:20  we have
"mountain" in place of "sycamine tree." {Be thou rooted up}
(ekriz(9374)h(8874)i). First aorist passive imperative as is
phuteuth(8874)i. {Would have obeyed} (hup(886b)ousen an). First
aorist active indicative with an, apodosis of a second-class
condition (note aorist tense here, imperfect elegete).