North American flora - New York Botanical Garden (New York Botanical Garden, 1939)

North American flora - New York Botanical Garden (New York Botanical Garden, 1940)

North American flora - New York Botanical Garden (New York Botanical Garden, 1914)

North American flora - New York Botanical Garden (New York Botanical Garden, 1917)

North American flora - New York Botanical Garden (New York Botanical Garden, 1924)

North American flora - New York Botanical Garden (New York Botanical Garden, 1932)

North American flora - New York Botanical Garden (New York Botanical Garden, 1937)

North American flora - New York Botanical Garden (New York Botanical Garden, 1923)

North American flora - New York Botanical Garden (New York Botanical Garden, 1913)

North American flora - New York Botanical Garden (New York Botanical Garden, 1909)

North American flora - New York Botanical Garden (New York Botanical Garden, 1912)

North American flora - New York Botanical Garden (New York Botanical Garden, 1915)

North American flora - New York Botanical Garden (New York Botanical Garden, 1931)

North American flora - New York Botanical Garden (New York Botanical Garden, 1935)