Jim S pointed out the change appropriate to the name derived from the English name Mason: older books show masonorum, the preferred form now is masoniorum. Here's another discrepancy between older usage and current usage. In an earlier post I made reference to words which have a different stem in the oblique cases. What does that mean? In Latin and Greek, there are words which have one stem for the nominative form and another stem for the other cases. Thus, the Greek word for mouth is, in its Latinized form, stoma. But the other cases (in the grammatical sense) of the word are based on the stem stomat- . Compounds should be formed from this oblique stem, not the nominative stem. Thus, in older books, you will see the family name Melastomaceae; the preferred modern form is Melastomataceae. Jim McKenney Montgomery County, Maryland, USA, USDA zone 7, where I'm wondering if some of you think it's time for me to shut my big stoma.