Maclura pomifera, Hedge Apple, Horse Apple, Bowdark, Bowdock, Bois d'Arc and of course, Osage-orange. All the same, depending on where you're from.
Making my first "osage" selfbow was intimidating to me. Way back then, all of the talk about humps, bumps, undulations, pin knots, spring and summer growth rings, etc. scared the bejesus out of me. Especially because I paid $50 for the stave, 20 years ago. It was my second bow. We didn't so much, narrow the tips back then. We were just learning about it. We didn't steam in reflex or make corrections with a heat gun. We discovered that, later. I picked a naturally reflexed, small diameter stave with decent growth rings and went for it. I won the Eagle Eye at Denton Hills with that bow. It eventually developed a little lift in front of a pin knot that I fixed with a sinew bandaid. The next year, I took my first archery whitetail with that bow. It accompanied me on a caribou hunt, an elk hunt and a moose hunt. Fearing It may eventually break, I retired that bow.
I've lost count how many osage bows I've made or helped make, since then. Hundreds, I suspect. I've made nice bows from several other woods to experience and sharpen my skills in the craft. To me though it's resilient, forgiving, tough and versatile. Capable of constructing bows of many different styles. Osage #1 still lies above my mantle.