notes Flowers and involucres of Chorizanthe ventricosa, growing in gravelly soil derived from the surrounding serpentine substrate. Although there appears to be a confusing mess of teeth in this image (because those at both the bottom and the top of the involucres are hard to distinguish in the view here), the teeth on the upper end of the involucre have one tooth quite elongate and straight throughout, while the other five teeth are much shorter and unciate.
That results in an erroneous outcome (of either C. uniaristata or C. rectispina...both of which have white perianths) when following the FNA key and/or the Jepson key.
Note that the Jepson Flora line drawing for C. ventricosa clearly (and correctly) shows the abaxial awn (or 'tooth') to be much elongate and straight...even though, to get to C. ventricosa in the Jepson key, one has to choose lead 20' which states: 'Involucre teeth of equal or alternating lengths, abaxial tooth not >> others'. The key in Mary Ann Matthews' book ''Flowering Plants of Monterey County'' recognizes C. ventricosa has a distinctly elongate abaxial awn, and these plants ID correctly in that work.
Note that C. ventricosa is associated with serpentine substrates, and that the Parkfield Grade area is a major known locale for the species (cf. this CalFlora page, and all the current CalPhotos posts).
