Evolution of Plant Structures

Goethe: Metamorphosis of Plants (1849)

Meehan: Stipules as Petals (1887)

Trichomes, Prickles and Leaves

Transactions of the Academy of Science of St. Louis, 9: 1-8 (1899)
Hitchcock: Studies on Subterranean Organs. I. Compositae of the Vicinity of Manhattan, KS.

Transactions of the Academy of Science of St. Louis, 10: 131-142 (1900)
Hitchcock: Studies on Subterranean Organs. II. Some Dicotyledonous Herbaceous Plants of Manhattan, KS.

Pemberton: Tea Rose vs. Noisette (1908)

Henslow: Origin and Structure of Aquatic Flowering Plnats (1911) pp. 88-94

Henslow: Origin of Monocotyledons from Aquatic Dicotyledons (1911) pp. 289-294

Emerson: Subterranean Organs of Bog Plants (1921)

Cook: Jointed leaves of Amygdalaceae (1912)

Cook: Morphology and evolution of leaves (1916)

Cook: Diversity of Internode Individuals, (1922)

Cook: Evolution of Compound Leaves in Walnuts and Hickories (1923)

Cook: Metaphanic Variation (1926)

Romberger: Pseudoterminal Buds (1963)

Ethel Sargant Bibliography on leaf morphology, pollination, etc.

Agnes Robertson Arber Bibliography on leaf morphology