Larval host plant for Eastern tiger swallowtail ( Pterourous glaucus ).

Larval host for the southern tiger swallowtail.  This butterfly is restricted to Magnolia virginiana.

Beetles are the primary pollinators. The flowers have a hardened carpel to avoid damage by their gnawing mandibles as the feed. The beetles are after the protein-rich pollen. Because the beetles are interesting in pollen and pollen alone, the flowers mature in a way that ensures cross pollination. The male parts mature first and offer said pollen. The female parts of the flower are second to mature. They produce no reward for the beetles but are instead believed to mimic the male parts, ensuring that the beetles will spend some time exploring and thus effectively pollinating the flowers ( In Defense of Plants blog).

Seeds are eaten by woodpeckers, kingbirds, red-eyed vireos, mockingbirds, robins, thrushes, crows, cardinals, squirrels, mice among others.

Deer browse leaves and twigs.

Fruits eaten by gray squirrels, mice, turkey and quail as well as a variety of smaller birds  including vireos, towhees,  blue jays, woodpeckers, kingbirds,  mockingbirds, robins, thrushes, crows, cardinals, squirrels, mice among others

Arbor Day Foundation. (Undated). Tree Guide: Learn About Sweetbay Magnolia. ( https://shop.arborday.org/treeguide/335 ). Accessed 2026. Arbor Day Foundation, Lincoln, NE.

Burns, Russell M., and Barbara H. Honkala [Technical coordinators]. (1990). Silvics of North America: Volume 2. Hardwoods. United States Department of Agriculture (USDA), Forest Service, Agriculture Handbook 654. ( https://www.fs.usda.gov/treesearch/pubs/1548 ). Accessed 2026.

Fox, Laurie, and Joel Koci. (2021). Trees and Shrubs that Tolerate Saline Conditions. ( https://www.pubs.ext.vt.edu/430/430-031/430-031.html ). Accessed 2026. Virginia Cooperative Extension, Virginia Tech, Blacksburg, VA.

Gann, G.D., C.J. Abbott, C.G. Stocking, K.N. Hines, and collaborators. (2001+). Sweet-bay. Natives For Your Neighborhood. ( https://www.regionalconservation.org/beta/nfyn/plantdetail.asp?tx=Magnvirg ). Accessed 2026. The Institute for Regional Conservation. Delray Beach, Florida.

Haehle, Robert G. and Joan Brookwell. (1999). Native Florida Plants. Gulf Publishing Company. Houston, TX.

Huegel, Craig N. (2010). Native Plant Landscaping for Florida Wildlife. University Press of Florida, Gainesville.

Minno, Marc, and Maria Minno. (1999). Florida Butterfly Gardening: A Complete Guide to Attracting, Identifying, and Enjoying Butterflies. University Press of Florida, Gainesville.

Nelson, Gil. (2003). Florida's Best Landscape Plants: 200 Readily Available Species for Homeowners and Professionals. University Press of Florida, Gainesville.

Osorio, Rufino. (2001). A Gardener's Guide to Florida's Native Plants. University Press of Florida, Gainesville.

Traas, Pamela. (2001). Gardening for Florida's Butterflies. Great Outdoors Publishing Co., St. Petersburg, FL.

University of Tennessee Extension Service. (2010). Desired pH Range and salt tolerance of common nursery plants. ( https://plantsciences.tennessee.edu/wp-content/uploads/sites/25/2021/10/Desired-pH-Range-List.pdf ). Accessed 2026. University of Tennessee Extension, Knoxville.

Watkins, John and Thomas Sheehan. (1975). Florida Landscape Plants, Native and Exotic. University Presses of Florida, Gainesville.

Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. (1999+). Atlas of Florida Plants. ( https://florida.plantatlas.usf.edu/ ). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.