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dimorphic snapdragon

tall snapdragon, twig-like snapdragon

Habit Annuals. Perennials.
Stems

8–90 cm, not self-supporting, hairy;

branches twining.

40–220 cm, self-supporting, glabrous;

branches not twining.

Leaves

opposite proximally, alternate distally;

blade ovate, 10–60 × 5–45 mm, surfaces glabrous, glandular-hairy, or eglandular-hairy.

alternate;

blade linear, 50–120 × 3–10 mm, surfaces glabrous.

Inflorescences

axillary, racemes or flowers solitary.

terminal, racemes.

Pedicels

1–3 mm.

2–6 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.

chasmogamous;

calyx lobes equal, glabrous, adaxial lobe 6–8 × 1.5–2.5 mm;

corolla pink to pale pink, 13–18 mm, base gibbous, mouth 3–5 mm diam., palate not veined, rounded, 5–7.5 mm diam., puberulent.

Capsules

narrowly ovoid, 5–6 mm, glandular-hairy, abaxial locule with 1 pore.

globular-ovoid, 7–9 mm, glabrous, abaxial locule with 2 pores.

Seeds

dark brown to black, 1 mm, tuberculate, reticulate-ridged.

black, 1–1.5 mm, ridges reticulate.

2n

= 30.

= 32.

Sairocarpus subcordatus

Sairocarpus virga

Phenology Flowering May–Jun. Flowering Jun–Jul.
Habitat Open slopes on serpentine, under shrubs. Openings in chaparral, rocky areas, often on serpentine.
Elevation 150–800 m. (500–2600 ft.) 200–2000 m. (700–6600 ft.)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Stems of Sairocarpus virga regrow quickly after fires (D. M. Thompson 1988).

Sairocarpus virga is known from the southern High and Inner North Coast ranges.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 17, p. 47. FNA vol. 17, p. 48.
Parent taxa Plantaginaceae > Sairocarpus Plantaginaceae > Sairocarpus
Sibling taxa
S. cornutus, S. coulterianus, S. kingii, S. multiflorus, S. nuttallianus, S. vexillocalyculatus, S. virga, S. watsonii
S. cornutus, S. coulterianus, S. kingii, S. multiflorus, S. nuttallianus, S. subcordatus, S. vexillocalyculatus, S. watsonii
Synonyms Antirrhinum subcordatum Antirrhinum virga
Name authority (A. Gray) D. A. Sutton: Revis. Antirrhineae, 477. (1988) (A. Gray) D. A. Sutton: Revis. Antirrhineae, 466. (1988)
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