"American botanist" . . . . "David Pearce Penhallow"@en . . "1910-10-20Z"^^ . "Penhallow, David Pearce"@en . . . "1854-05-25Z"^^ . . . . "1854Z"^^ . "1910Z"^^ . "David Pearce Penhallow (25 May 1854 \u2013 20 October 1910) was a Canadian-American botanist, paleobotanist and educator.Born in Kittery Point, Maine, Penhallow graduated from Massachusetts Agricultural College in 1873 (now the University of Massachusetts Amherst). When his former professor, William S."@en .