Flower-Visiting Insects
of Spotted Knapweed
Centaurea biebersteinii (Spotted Knapweed) introduced
(Also known as Centaurea maculosa and Centaurea stoebe micranthos. The butterfly sucks nectar, bees suck nectar or collect pollen, while beetle activity is unspecified; observations are from Herms, MacRae, Swengel & Swengel, Williams, and Wilhelm & Rericha as indicated below.)
Bees (long-tongued)
Apidae (Apinae): Apis mellifera (WR); Apidae (Bombini): Bombus griseocollis (WR), Bombus impatiens (WR); Anthophoridae (Ceratinini): Ceratina dupla (WR); Megachilidae (Coelioxini): Coelioxy banksi sn (WR); Megachilidae (Megachilini): Megachile relativa (WR)
Bees (short-tongued)
Halictidae (Halictinae): Halictus ligatus (WR), Lasioglossum pectorale (WR)
Butterflies
Lycaenidae: Lycaeides melissa samuelis fq (Hm, Sw)
Beetles
Buprestidae: Acmaeodera tubulus (McR); Cantharidae: Chauliognathus pennsylvanicus (Wms); Mordellidae: Mordella atrata (WR)