Asclepias tuberosa did not establish in 2000, but did so the following year.
hirta and Vernonia gigantea flowered in 2000 and 2001, whereas those of Asclepias tuberosa flowered only in 2001.
We studied the pollination effectiveness of flower visitors to Asclepias tuberosa L.
We observed 80 species of visitors to Asclepias tuberosa flowers, including one hummingbird and 79 insects (Appendix).
In a well quantified southwest Michigan study (n = 1120 observations), Asclepias tuberosa, M punctata, Centaurea maculosa, Coreopsis lanceolata, Tephrosia virginiana, E.
Asclepias tuberosa, Helianthemum occidentalis, Lupinus perennis and Rudbeckia hirta were on the Wisconsin list of frequently selected nectar species (Bleser, 1994).
This study investigated the possible effects of several salt concentrations on seven species of plants native to Illinois: butterfly milkweed (Asclepias tuberosa), pale purple coneflower (Echinacea pallida), rattlesnake master (Eryngium yuccifolium), rough blazing star (Liatris aspera), Ohio spiderwort (Tradescantia ohiensis), little bluestem (Schizachyrium scoparium), and prairie dropseed (Sporobolus heterolepis).
The species used in both the laboratory and field portions of this study were butterfly milkweed (Asclepias tuberosa L.: Asclepiadaceae), pale purple coneflower (Echinacea pallida Nutt.: Asteraceae), rattlesnake master (Eryngium yuccifolium Michx.: Apiaceae), rough blazing star (Liatris aspera Michx.: Asteraceae), Ohio spiderwort (Tradescantia ohiensis Raf.: Commelinaceae), little bluestem (Schizachyrium scoparium Michx.: Poaceae), and prairie dropseed (Sporobolus heterolepis L.: Poaceae).
This 10- by 75-foot prairielike section combines blue grama grass (Bouteloua gracilis) with perennials, including blanket flower (Gaillardia grandiflora), butterfly weed (Asclepias tuberosa
), Penstemon barbatus, and Thelesperma filifolium.
Butterfly weed (Asclepias tuberosa
) is the most restrainable and garden-worthy of the many milkweeds.