I generally assume that the rest of the plant world knows how to correctly pronounce botanical Latin and I’m the one with the lack of ability. So when I hear a couple of plants-people whom I respect pronounce Pittosporum a new (to me) way I pay attention.
Just to check my new assumption I decide to visit the Fine Gardening Magazine pronunciation guide. That’s when things get interesting. Turns out if you just want to say Pittosporum it sounds like Pit-toss-poor-um.
But if you want to say Pittosporum tobira or Pittosporum tenuifolium then Pittosporum sounds like Pit-o-spore-um.
Try it: http://www.finegardening.com/pguide/pronunciation-guide-to-botanical-latin.aspx
What sense does that make? If you say my first name (Loree) it sounds like “Lori”. If you say my first name and my last name together well, my first name still sounds like “Lori” (well unless you get all fancy, in which case it sounds like Lereee in both examples but I grew up in Spokane…people don’t talk fancy there…maybe my name wasn’t the best example to use?)