do both variwtis of locust hve lrger nuts?
Maybe it int the thorns but the fruits that were of use. I had to look up thevarieties of honey locust (black, thorny, honey) they all had some throny segments of the tree. The honey locusts thorns (according to the Pa extensive arborist annual, That variety had its thorns only at the height where deer would have been deterred. Plesitocene megafauna were often ABOVE the thorn areas but within the sweet nut browse area. '
However , humans have taken to spreading this tree artificially because its found in 39 oof the 50 states and its a source of some kind of sweetened syrup. (BUT the nuts hve to be ground. Apparently not ALL the nuts are wasted on making sweetener (and Mammoths arent crappin em out) So weve got artificial selection.
Polymorphism doesnt always lead to evolution or extinction of several of the "morphs. Like the peppered moth, predation can exist under several means and as long as the moth species is extant, the polymoorphic forms may remain in the pool and the genes are expressed at some ratio that almost appears to be 1 to 1 unless predator pressure "selects" one form out for awhile