Hedgerow hairstreak
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Lycaenidae
Genus:	Satyrium
Species:	S. saepium
Binomial name
Satyrium saepium (Boisduval, 1852)[1]
Synonyms
Thecla saepium Boisduval, 1852 Strymon saepium var. okanagana McDunnough, 1944 Ignata illepida Johnson, 1992 Thecla chalcis Edwards, 1869 Thecla saepium var. fulvescens H. Edwards, 1877 Strymon saepium chlorophora Watson & Comstock, 1920 Strymon saepium provo Watson & Comstock, 1920 Satyrium saepium rubrotenebrosum Emmel, Emmel & Mattoon, 1998 Satyrium saepium caliginosum Emmel, Emmel & Mattoon, 1998 Satyrium saepium subaridum Emmel, Emmel & Mattoon, 1998 Satyrium saepium obscurofuscum Austin, 1998 Satyrium saepium latalinea Austin & Savage, 1998

Satyrium saepium, the hedgerow hairstreak, is a butterfly of the family Lycaenidae. It is found in western North America,^[1] from British Columbia south through California into Baja California and east through northern Arizona to northern New Mexico, Colorado and Montana.

The wingspan is 26–30 mm. Adults are on wing from April to September. They feed on the nectar of various flowers, including yerba santa and wild buckwheats.

The larvae feed on the buckbrush (Ceanothus species, Rhamnaceae).^[2]

• S. s. caliginosum Emmel, Emmel & Mattoon, 1998 (California)
• S. s. chalcis (Edwards, 1869) (California)
• S. s. chlorophora (Watson & Comstock, 1920) (California)
• S. s. fulvescens (H. Edwards, 1877) (California)
• S. s. latalinea Austin & Savage, 1998 (Utah)
• S. s. obscurofuscum Austin, 1998 (Nevada)
• S. s. provo (Watson & Comstock, 1920) (Utah)
• S. s. rubrotenebrosum Emmel, Emmel & Mattoon, 1998 (California)
• S. s. subaridum Emmel, Emmel & Mattoon, 1998 (California)
• S. s. saepium (California to British Columbia)