Sairocarpus vexillocalyculatus

(Kellogg) D. A. Sutton

Revis. Antirrhineae, 472. 1988.

Common names: Wiry snapdragon
Endemic
Basionym: Antirrhinum vexillocalyculatum Kellogg Proc. Calif. Acad. Sci. 1: 27. 1855
Treatment appears in FNA Volume 17. Treatment on page 47. Mentioned on page 24, 44.

Annuals. Stems 7–170 cm, not self-supporting, glabrous, eglandular-hairy, or glandular-hairy; branches twining. Leaves opposite proximally, alternate distally; blade ovate to narrowly elliptic, 10–60 × 1–20 mm, surfaces glabrous or hairy. Inflorescences axillary, racemes or flowers solitary. Pedicels 1–4 mm. Flowers cleistogamous and chasmogamous; calyx lobes unequal, glandular-hairy, adaxial lobe 3.5–14 × 1–9 mm; corolla light purple to white, often dark-veined, 8–17 mm, base gibbous, mouth 2–4 mm diam., palate sometimes purple-veined, convex, 3.5–8 mm diam., puberulent. Capsules ovoid, 4–8 mm, glandular-hairy, abaxial locule with 1 pore. Seeds dark brown to black, 0.7–1.5 mm, tuberculate, reticulate-ridged. 2n = 30.

Discussion

Subspecies 3 (3 in the flora).

Subspecies breweri and vexillocalyculatus intergrade where their distributions overlap in the coastal ranges of California. Subspecies intermedius is disjunct in the Sierra Nevada.

Selected References

None.

Key

1 Stems proximally glabrous or eglandular-hairy; corollas 11–17 mm, adaxial lips 7–17 mm. Sairocarpus vexillocalyculatus subsp. vexillocalyculatus
1 Stems proximally glandular-hairy and, sometimes, eglandular-hairy; corollas 8–15 mm, adaxial lips 2–5.5 mm. > 2
2 Inflorescence branches with 1 leaf at each proximal node. Sairocarpus vexillocalyculatus subsp. breweri
2 Inflorescence branches with 2 leaves at each proximal node. Sairocarpus vexillocalyculatus subsp. intermedius