Icaricia lupini, the lupine blue, is a butterfly of the family Lycaenidae. It is found from south-western Canada, south through much of mountainous and intermountain western United States and high plains to northern Mexico.

Lupine blue
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Lycaenidae
Genus: Icaricia
Species:
I. lupini
Binomial name
Icaricia lupini
(Boisduval, 1869)
Synonyms
  • Lycaena lupini Boisduval, 1869
  • Plebejus lupini (Boisduval, 1869)
  • Aricia lupini (Boisduval, 1869)

The wingspan is 22–29 mm. Adults are on wing from June to August in one generation in the Sierra Nevada of eastern California. Elsewhere, there are several generations from March to July.

The larvae feed on Eriogonum umbellatum and Eriogonum fasciculatum. Adults feed on flower nectar.

The hairs of the caterpillars can cause skin irritation (urticaria).

Subspecies

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  • Icaricia lupini lupini (California)
  • Icaricia lupini monticola (California)
  • Icaricia lupini chlorina
  • Icaricia lupini texanus (Arizona)
  • Icaricia lupini argentata (California)
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  Media related to Icaricia lupini at Wikimedia Commons