I have discussed the parallel case of a normal fish like a monstrous gold-fish.
I end my discussion by doubting, because all cases of monstrosities which resemble normal structures which I could find were not in allied groups.

Trees like Aspicarpa (95/5.

Aspicarpa, an American genus of Malpighiaceae, is quoted in the "Origin" (Edition VI., page 367) as an illustration of Linnaeus' aphorism that the characters do not give the genus, but the genus gives the characters.

During several years' cultivation in France Aspicarpa produced only degraded flowers, which differed in many of the most important points of structure from the proper type of the order; but it was recognised by M.Richard that the genus should be retained among the Malpighiaceae.

"This case," adds Darwin, "well illustrates the spirit of our classification."), with flowers of two kinds (in the "Origin"), led me also to speculate on the same subject; but I could find only one doubtfully analogous case of species having flowers like the degraded or monstrous flowers.