Western White

Pontia occidentalis (Reakirt 1866)

have host

• Global Biotic Interactions: Lepidium virginicum L. (Virginia pepperweed)
• Global Biotic Interactions: Phoenicaulis cheiranthoides Nutt. (wallflower phoenicaulis)
• Global Biotic Interactions: Boechera platysperma (A. Gray) Al-Shehbaz (pioneer rockcress)
• Global Biotic Interactions: Noccaea fendleri subsp. glauca (A. Nelson) Al-Shehbaz & M. Koch (alpine pennycress)
• Global Biotic Interactions: Streptanthus barbatus S. Watson (Pacific jewelflower)
• Global Biotic Interactions: Lepidium fremontii S. Watson (desert pepperweed)
• Global Biotic Interactions: Draba cuneifolia Nutt. (wedgeleaf draba)
• Global Biotic Interactions: Lepidium campestre (L.) W. T. Aiton (field pepperweed)
• Global Biotic Interactions: Caulanthus lasiophyllus (Hook. & Arn.) Payson (California mustard)
• Global Biotic Interactions: Sisymbrium officinale (L.) Scop. (English watercress)
• Global Biotic Interactions: Lepidium ramosissimum A. Nelson (manybranched pepperweed)
• Global Biotic Interactions: Turritis glabra L. (Tower mustard)
• Global Biotic Interactions: Draba crassifolia Graham (snowbed draba)
• Global Biotic Interactions: Sisymbrium altissimum L. (tall tumblemustard)
• Global Biotic Interactions: Barbarea vulgaris (L.) W. T. Aiton (winter-cress, yellow rocket)
• Global Biotic Interactions: Boechera retrofracta (Graham) A. Löve & D. Löve (Reflexed Rockcress)
• Global Biotic Interactions: Descurainia incisa (Engelm. ex A. Gray) Britton
• Global Biotic Interactions: Boechera stricta (Graham) Al-Shehbaz (Canadian Rockcress)
• Global Biotic Interactions: Boechera breweri (S. Watson) Al-Shehbaz (Brewer's rockcress)
• Global Biotic Interactions: Descurainia sophia (L.) Webb ex Prantl (herb sophia)
• Global Biotic Interactions: Lepidium virginicum subsp. menziesii (DC) Thell. (intermediate pepperweed)
• Global Biotic Interactions: Descurainia incana (Bernh. ex Fisch. & C. A. Mey.) Dorn (mountain tansymustard)
• Global Biotic Interactions: Chorispora tenella (Pall.) DC. (crossflower)
• Global Biotic Interactions: Brassica nigra (L.) W. D. J. Koch (black mustard)
• Global Biotic Interactions: Boechera pinetorum (Tidestrom) Windham & Al-Shehbaz (Holboell's rockcress)
• Global Biotic Interactions: Peritoma lutea
• Global Biotic Interactions: Athysanus pusillus (Hook.) Greene (common sandweed)
• Global Biotic Interactions: Draba howellii S. Watson (rosette draba)
• Global Biotic Interactions: Streptanthus tortuosus Kellogg (shieldplant)