An illustrated flora of the Northern United States, Canada and the British possessions. 2. Portulacaceae to menyanthaceae : portulaca to buckbean

بواسطة Britton, Nathaniel Lord, Brown, Addison

An illustrated flora of the Northern United States, Canada and the British possessions. 1. Ophioglossaceae to aizoaceae : ferns to carpet-weed

بواسطة Britton, Nathaniel Lord, Brown, Addison

The new Britton and Brown illustrated flora of the Northeastern United States and adjacent Canada. 1. The Pteridophyta, Gymnospermae and Monocotyledoneae

بواسطة Gleason, Henry Allan, Britton, Nathaniel Lord, Brown, Addison

The new Britton and Brown illustrated flora of the Northeastern United States and adjacent Canada. 2. The Choripetalous Dicotyledoneae

بواسطة Gleason, Henry Allan, Britton, Nathaniel Lord, Brown, Addison

The new Britton and Brown illustrated flora of the Northeastern United States and adjacent Canada. 3. The Sympetalous Dicotyledoneae

بواسطة Gleason, Henry Allan, Britton, Nathaniel Lord, Brown, Addison