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Plants that support Juniper Hairstreak

14 plants

Big Deervetch

Hosackia crassifolia var. crassifolia

high

perennial herb

Larvae feed on plant foliage; univoltine or bivoltine depending on location

Bay Area native

Bigelow's Sneezeweed

Helenium bigelovii

moderate

perennial herb

Uses as larval foodplant; multiple generations spring through fall

Bay Area native

Bladder Desert-parsley

Lomatium utriculatum

moderate

perennial herb

Larvae feed on Apiaceae; multiple broods April-September in California

Bay Area native

California Coffeeberry

Frangula californica

high

shrub

Larval host plant, caterpillars feed on new growth April-May

Bay Area native

California Juniper

Juniperus californica

high

tree

Important larval host; caterpillars consume juniper foliage year-round in mild California climate

Bay Area nativeKeystone species

Cascade Canada Goldenrod

Solidago elongata

moderate

perennial herb

late summer adult nectar source

Bay Area nativeKeystone species

Deerbrush

Ceanothus integerrimus

moderate

perennial herb

Caterpillars feed on spring foliage and new growth

Bay Area nativeKeystone species

Deerweed

Acmispon glaber

moderate

shrub

Larval host; supports spring brood development

Bay Area native

Glandular Layia

Layia glandulosa

high

perennial herb

Larval food plant for caterpillars in spring emergence period

Bay Area native

Ninebark

Physocarpus capitatus

high

shrub

Larval host plant for butterfly caterpillars

Bay Area native

Oregon Bitter-root

Lewisia rediviva

moderate

perennial herb

Caterpillars feed on host plants; adults use Lewisia for nectar

Bay Area native

Stretchberry

Forestiera pubescens

high

tree

Multi-generational larval host; eggs laid on foliage throughout growing season

Bay Area native

Water parsely

Oenanthe sarmentosa

moderate

perennial herb

Caterpillars feed on various host plants in California; Apr-Sep

Bay Area native

Winecup clarkia

Clarkia purpurea

moderate

annual

Spring bloom nectar foraging

Bay Area native