Sairocarpus subcordatus
Revis. Antirrhineae, 477. 1988.
Annuals. Stems 8–90 cm, not self-supporting, hairy; branches twining. Leaves opposite proximally, alternate distally; blade ovate, 10–60 × 5–45 mm, surfaces glabrous, glandular-hairy, or eglandular-hairy. Inflorescences axillary, racemes or flowers solitary. Pedicels 1–3 mm. Flowers chasmogamous; calyx lobes unequal, hairy or glandular-hairy, adaxial lobe 8–14 × 5–10 mm; corolla white to tan, 13–17 mm, base gibbous, mouth 2.5–3.5 mm diam., palate not veined, slightly 2-lobed, 5–9 mm diam., tomentose. Capsules narrowly ovoid, 5–6 mm, glandular-hairy, abaxial locule with 1 pore. Seeds dark brown to black, 1 mm, tuberculate, reticulate-ridged. 2n = 30.
Phenology: Flowering May–Jun.
Habitat: Open slopes on serpentine, under shrubs.
Elevation: 150–800 m.
Discussion
Sairocarpus subcordatus is similar to S. vexillocalyculatus; it has relatively broader leaves and white to tan corollas with abaxial lobes reflexed. The species is known from the northern and central Inner North Coast Ranges.
Selected References
None.