]> NEBC barcode-00572838 United States of America Massachusetts Tyngsboro, by Tyng's Pond Asclepias incarnata subspecies pulchra (Ehrhart ex Willdenow) Woodson (Ehrhart ex Willdenow) Woodson 2020-10-13 13:42:24 C. A. Weatherby, L. B. Smith, I. D. Clement, J. A. E. Rouleau & K. G. Eldredge