Sairocarpus coulterianus (syn. Antirrhinum coulterianum) is a species of New World snapdragon known by the common name Coulter's snapdragon.^[2][3] Anterrhinum coulterianum is a host species for the Edith's checkerspot butterfly.^[4]

Quick Facts Sairocarpus coulterianus, Scientific classification ...

Sairocarpus coulterianus
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Plantaginaceae
Genus:	Sairocarpus
Species:	S. coulterianus
Binomial name
Sairocarpus coulterianus (Benth.) D.A.Sutton
Synonyms[1]
Antirrhinum coulterianum Benth. Antirrhinum coulterianum var. nevinianum (A.Gray) Jeps. Antirrhinum coulterianum subsp. orcuttianum (A.Gray) Pennell Antirrhinum coulterianum f. orcuttianum (A.Gray) Munz Antirrhinum nevinianum A.Gray Antirrhinum orcuttianum A.Gray

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It is native to southern California and Baja California, where it grows in desert shrublands and in the coastal hills and mountains, especially in areas that have recently burned.

Sairocarpus coulterianus is an annual herb producing an erect stem which often clings to objects or other plants for support. It is mostly hairless, except for the inflorescence at the top, which can be quite woolly.

Leaves are sparse and generally linear and there is often a basal rosette of leaves at the base of the stem.

The top of the mostly naked stem is occupied by a raceme inflorescence of white snapdragon flowers, which are often tinted with lavender or pink, especially when newly opened. Each flower is about a centimeter wide.