Which flowering plant is native to Central America, Helictotrichon or Odontonema?
Odontonema Odontonema, the toothedthreads, is a genus of flowering plants in the bear's breeches family, Acanthaceae. It is native to Central America.
Grusonia pulchella Grusonia pulchella (Engelm.) H.Rob. (sagebrush cholla) is a tuberous species of opuntioid cactus from the Mojave Desert of central Nevada, eastern California, northwestern Arizona and western Utah in the United States. "Grusonia pulchella" has at various times been included in "Opuntia" or placed in a separate genus "Micropuntia".