Euphorbia

Correspondence: Watson (Sereno) and Engelmann (George)

Sereno Watson

Euphorbias: a gardeners' guide

Roger Turner.

Correspondence: Short (Charles) and Engelmann (George)

Charles Wilkins Short

Correspondence: Griswold (Henry) and Engelmann (George)

Henry A. Griswold

Correspondence: Robbins (James) and Engelmann (George)

J. W. Robbins

Correspondence: Gattinger (Augustin) and Engelmann (George)

Augustin Gattinger

Correspondence: Thomas (Friedrich) and Engelmann (George)

Friedrich August Wilhelm Thomas

Correspondence: Mohr (Charles) and Engelmann (George)

Charles Theodore Mohr

Correspondence: Gray and Engelmann

Asa Gray

Correspondence: Greene (Edward) and Engelmann (George)

Edward Lee Greene