Nathaniel Lord Britton

An Illustrated Flora of the Northern United States

An Illustrated Flora of the Northern United States, Canada and the British Possessions, Vol. III

The Cactaceae; descriptions and illustrations of plants of the cactus family

An Illustrated Flora of the Northern United States, Canada and the British Possessions, Vol. I

An illustrated flora of the northern United States, Canada and the British possessions from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian