Phytoneuron 2012-54: 1. 2012.
Herbs, annual. Stems erect, 10–100 mm, glandular-puberulent to glandular-pubescent. Leaves mostly cauline, relatively even-sized; petiole absent, larger with petiolelike extension; blade narrowly to broadly ovate to broadly elliptic, (4–) 8–39 × (2–) 4–23 mm, margins entire or crenate, plane, proximal 1/2 usually ciliate, apex obtuse, surfaces glandular-pubescent. Pedicels 1.5–4 mm in fruit, not twisting to invert calyx. Flowers 2 per node, or 1 or 2 per node on 1 plant, chasmogamous. Calyces distinctly asymmetrically attached to pedicel, inflated in fruit, 8–13 mm, glandular-pubescent, lobes subequal, apex obtuse, ribs green, intercostal areas pale green to whitish. Corollas: throat magenta, golden yellow at base, limb magenta, palate ridges golden yellow, purple-speckled, tube-throat 12–19 mm, limb 5–11 mm diam., bilabiate, abaxial lip smaller than adaxial. Anthers (distal pair) nearly exserted, glabrous. Styles pubescent distally. Stigmas exserted, lobes unequal, abaxial 3–4 times adaxial. Capsules (5–) 6–11 mm, indehiscent.
Phenology: Flowering Mar–Apr(–May).
Habitat: Rocky, brushy slopes.
Elevation: 100–300 m.
Calif., Mexico (Baja California)
Diplacus brandegeei is known only from Santa Catalina (Los Angeles County), Santa Cruz (Santa Barbara County), and Guadalupe (Baja California) islands. The earliest name for the species, Mimulus latifolius A. Gray, was first transferred to Diplacus as D. latifolius (A. Gray) G. L. Nesom, but that name is a later homonym of D. latifolius Nuttall.