Seen on Arroyo Burro trail (backside), at Forbush, Cottam and down by the Grotto in grassy areas.
The flowers are mostly white with a few pink ones (sometimes on the same plant). The flowers are in small umbrels with a small tuft of bracts.
Opposite leaves, but each leaf is so finely divided that it almost looks as if they were in whorl around the stem.
The plants I saw were all 3-6 inches tall; I’ve read that it grows taller in the shade but I haven’t seen any in the shade.