Polemoniaceae: Phlox Family — Linanthus
The beautiful flowers in the phlox family are mostly tubular. Instead of distinct petals, they have spreading lobes, fused to the tube at their base. They may be bell-shaped with gradually spreading lobes, or funnel-shaped, with a slender tube and abruptly spreading lobes. Typically, there are 5 lobes, with 5 stamens attached to the tube, and 3 stigmas on the pistil.
Linanthus used to include what are now separated into two genera, Linanthus and Leptosiphon, depending upon whether or not the flower tube is exserted from the calyx. The common name Linanthus may apply to members of both genera.