Asclepias syriaca

J. Kelly
J. Kelly
A. Chartier
L. Wallis Young fruit
R. Schipper
R. Schipper
R. Schipper
R. Schipper underside of leaf
R. Schipper upperside of leaf
L. N. May
R.W. Smith
R. Schipper
R. Schipper
ex W. H. Wagner slide collection flower top yiew
Ann Arbor Natural Area Preservation
Ann Arbor Natural Area Preservation seeds
B. S. Walters fruits
C. Peirce
C. Peirce
C. Peirce
C. Peirce
L. Wallis
R. W. Smith
G. Vaclavek seedpods