Don Rideout found this plant while searching for more Stipellula capensis above the main population on the Alternate Trail in Borrego Palm Canyon. He discovered a single individual of this non-native natal grass, which had never been seen before in ABDSP. There are no iNat records or vouchers of this grass in either ABDSP or the Coachella Valley! It is a coastal weed in southern California.
We got this plant just in time, as it was just starting to drop its seeds. Don carefully gathered up the seeds, and we made a voucher out of this plant.
What were the odds of having TWO new non-native species found near the highest point on the Alternate Trail within a week of each other???
Thanks to @birgitknorr who first discovered the plant: