Karl McKay Wiegand

1873 – 1941

• A key to the genera of woody plants in winter
• A new species of Spergularia
• Carex laxiflora and its relatives
• Eupatorium purpureum L. and Eupatorium Maculatum L. notes
• Oxalis corniculata and its relatives in North America
• The flora of the Cayuga Lake Basin, New York
• The genus Eupẖṟasia in North America
• The structure of the fruit in the order Ranunculaceae
• The variations of Luzula campestris in North America