Why not post a picture. Other than that, you can check out any of the bulb dealers, such as Van Engelen or Brent and Becky's. Google Dallas Plant Trials and you will see pictures of a number of cultivars. A lone tulip may be difficult to identify, however, particularly if it is in "rescue" condition.

Is it yellow? T.sylvestris (dunno why I am assuming it is some kind of naturalised species here, mind).

Oh, it's a garden variety.. just not over-tall. My phone camera sucks slug bait, hence no pics.

I think it's Duc Van Tol Primrose

http://www.thetulipgallery.com/view/126

single early, 1921. colour/shading is right, & it has those little points on the petals