<i>Ammoselinum popei</i> Torr. &amp; A. Gray - plains sandparsley
AMPO4
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 2: 652.
1913
<a rel="nofollow" class="external free" href="https://plants.usda.gov/java/profile?symbol=AMPO4">http://plants.usda.gov/java/profile?symbol=AMPO4</a>