Onthophagus pennsylvanicus Harold 1871

are mutualistic with

• Global Biotic Interactions: Spiranthes lacera (Raf.) Raf. (Slender ladies'-tresses)
• Global Biotic Interactions: Datura stramonium L. (Thorn-apple)
• Global Biotic Interactions: Bidens frondosa L. (devil's beggartick)
• Global Biotic Interactions: Frasera fastigiata (Pursh) A. A. Heller (clustered green gentian)
• Global Biotic Interactions: Galium trifidum L. (three-petal bedstraw)
• Global Biotic Interactions: Veratrum virginicum (L.) W. T. Aiton (Virginia Bunchflower)
• Global Biotic Interactions: Cirsium discolor (Muhl. ex Willd.) Spreng. (field thistle)
• Global Biotic Interactions: Lespedeza virginica (L.) Britton (slender lespedeza)
• Global Biotic Interactions: Abutilon theophrasti Medik. (Indianmallow)
• Global Biotic Interactions: Solidago nemoralis Ait. (gray goldenrod)
• Global Biotic Interactions: Ammannia coccinea Rottb. (valley redstem)
• Global Biotic Interactions: Echinacea pallida (Nutt.) Nutt. (pale purple coneflower)
• Global Biotic Interactions: Geum canadense Jacq. (white avens)
• Global Biotic Interactions: Viburnum dentatum L. (southern arrowwood)
• Global Biotic Interactions: Helianthus mollis Lam. (ashy sunflower)
• Global Biotic Interactions: Crataegus submollis Sarg. (Quebec hawthorn)
• Global Biotic Interactions: Erechtites hieracifolia
• Global Biotic Interactions: Taenidia integerrima (L.) Drude (yellow pimpernel)
• Global Biotic Interactions: Ageratina altissima (L.) R. King & H. Rob. (white snakeroot)
• Global Biotic Interactions: Erythronium albidum Nutt. (white fawnlily)
• Global Biotic Interactions: Aesculus hippocastanum L. (European horse chestnut)
• Global Biotic Interactions: Penstemon hirsutus (L.) Willd. (hairy beardtongue)
• Global Biotic Interactions: Asclepias verticillata L. (whorled milkweed)
• Global Biotic Interactions: Plantago major L. (Broadleaf Plantain)
• Global Biotic Interactions: Ambrosia trifida L. (great ragweed)
• Global Biotic Interactions: Boltonia asteroides (L.) L'Hér. (white doll's daisy)
• Global Biotic Interactions: Cerastium glomeratum Thuill. (sticky chickweed)
• Global Biotic Interactions: Cuscuta glomerata Choisy (rope dodder)
• Global Biotic Interactions: Melilotus albus Medik. (White Melilot)
• Global Biotic Interactions: Cynoglossum officinale L. (gypsyflower)
• Global Biotic Interactions: Mertensia virginica (L.) Pers. ex Link (Virginia Bluebell)
• Global Biotic Interactions: Crataegus crus-galli L. (Cockspur Hawthorn)
• Global Biotic Interactions: Desmodium illinoense A. Gray (Illinois ticktrefoil)
• Global Biotic Interactions: Erigeron canadensis L. (Canadian Horseweed)
• Global Biotic Interactions: Calystegia sepium subsp. sepium (hedge false bindweed)
• Global Biotic Interactions: Mentha arvensis L. (wild mint)
• Global Biotic Interactions: Aesculus glabra Willd. (Ohio buckeye)
• Global Biotic Interactions: Ceanothus americanus L. (New Jersey tea)
• Global Biotic Interactions: Veronica arvensis L. (common speedwell)
• Global Biotic Interactions: Geranium carolinianum L. (Carolina geranium)
• Global Biotic Interactions: Helianthus grosseserratus M. Martens (sawtooth sunflower)
• Global Biotic Interactions: Amelanchier laevis Wieg. (Allegheny Serviceberry)
• Global Biotic Interactions: Desmodium canadense (L.) DC. (showy ticktrefoil)
• Global Biotic Interactions: Asclepias tuberosa L. (butterfly milkweed)
• Global Biotic Interactions: Cardamine concatenata (Michx.) O. Schwarz (cutleaf toothwort)
• Global Biotic Interactions: Dicentra cucullaria (L.) Bernh. (dutchman's breeches)
• Global Biotic Interactions: Amaranthus spinosus L. (Thorny pigweed)
• Global Biotic Interactions: Capsella bursa-pastoris (L.) Medik. (shepherd's purse)
• Global Biotic Interactions: Helianthus strumosus L. (Pale-Leaf Woodland Sunflower)
• Global Biotic Interactions: Staphylea trifolia L. (American bladdernut)
• Global Biotic Interactions: Planodes virginicum (L.) Greene (Virginia Winged Rockcress)