Isoetaceae

Correspondence: Watson (Sereno) and Engelmann (George)

Sereno Watson

Correspondence: Lesquereux (Leo) and Engelmann (George)

Leo Lesquereux

Correspondence: Gattinger (Augustin) and Engelmann (George)

Augustin Gattinger

Correspondence: Macoun (John) and Engelmann (George)

John Macoun

Correspondence: Smith (John) and Engelmann (George)

John Donnell Smith

Correspondence: Leggett (William) and Engelmann (George)

William Henry Leggett

Correspondence: Schneck (Jacob) and Engelmann (George)

J. Schneck

Correspondence: Tuckerman (Edward) and Engelmann (George)

Edward Tuckerman

Correspondence: Durand (Elias) and Engelmann (George)

Elias Durand

Correspondence: Hall (Elihu) and Engelmann (George)

Elihu Hall