''Ptelea aptera'', the wingless ptelea, is a small flowering shrub native to

Baja California Norte Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

. It is neighbored by the more northern ''

Ptelea crenulata ''Ptelea crenulata'', commonly known as the California hoptree, is a species of tree that is endemic to the state of California in the United States. It is found in the western Sierra Nevada and southern Cascade Range foothills, the northern Cali ...

'', the western hoptree. It seemingly has the smallest distribution of the three species. This species is located almost entirely within the Baja area and is predicted to be at risk of extinction.

References

Zanthoxyloideae {{Rutaceae-stub Flora of Baja California Shrubs Endangered flora of North America