After seeing @alan_rockefeller's observation HERE I had to go take a look!
Photos:
1&2 - Upright, multiflowered, calyx lobes 5
3 - Basal leaf narrow (oblong-lanceolate?) not clasping
4 - Middle part of stem shows calyx lobes 3, leaves smaller
5 - branching
6 - top of leaf glabrous
7 - bottom of leaf glabrous
8 - fruiting capsule long and narrow, fracturing near apex
9 - roots (not diagnostic)
10 - Measurement of inflorescence
11 - Seeds
12 - Seeds
I agree with @sambiology on his observation HERE that this keys out as T. leptocarpa using FNCT.
Exciting find Alan!!
A suggested "Let's Get Outside!" activity for the El Camino Real TMN chapter: Nature survey of the 12th St Park (aka Poor Farm)
Found in a roadside ditch in a parking area leading to a large creek. Leaves looked very rounded. Many in bloom, so collected, but others look less rounded.