Flora of North America species comparison

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Sairocarpus coulterianus

Coulter's snapdragon
Habit Annuals.
Stems

12–150 cm, seldom self-supporting, basally hairy, otherwise glabrous;

branches twining.
Leaves

opposite proximally, basal rosette sometimes present, alternate distally;

blade lanceolate to linear, 20–50(–110) × 1–5(–25) mm, surfaces glabrous or slightly villous.
Inflorescences

terminal, racemes.
Pedicels

1–5 mm.
Flowers

cleistogamous and chasmogamous;

calyx lobes equal to subequal, glandular-hairy, adaxial lobe 3–6 × 0.5–1 mm;

corolla white to light purple, 9–12 mm, base gibbous, mouth 1–1.5(–2) mm diam., palate purple-spotted, rounded, 4–8 mm diam., glandular-hairy.
Capsules

narrowly ovoid, 5–10 mm, sparsely glandular-hairy, abaxial locule indehiscent.
Seeds

black, 1 mm, longitudinally ridged, reticulate.
2n

= 30.

Sairocarpus coulterianus
Phenology Flowering Apr–Jul.
Habitat Coastal and desert scrub, burned slopes.
Elevation 0–2700 m. (0–8900 ft.)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

The relatively large, rounded palates make the flowers of Sairocarpus coulterianus distinctive. Plants growing in chaparral and coastal sage habitats usually have basal rosettes. Sometimes, the racemes develop an elongate, prehensile tip. Sairocarpus coulterianus is known from the southern Outer South Coastal Ranges, southwestern mainland California, and the northwestern edge of the Sonoran Desert.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 45.
Parent taxa Plantaginaceae > Sairocarpus
Sibling taxa
S. cornutus, S. kingii, S. multiflorus, S. nuttallianus, S. subcordatus, S. vexillocalyculatus, S. virga, S. watsonii
Synonyms Antirrhinum coulterianum, A. coulterianum subsp. orcuttianum
Name authority (Bentham ex A. de Candolle) D. A. Sutton: Revis. Antirrhineae, 468. (1988)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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