Pollen grains: why so many? von Cruden, R. W.

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Pollinators in High-Elevation Ecosystems: Relative Effectiveness of Birds and Bees von Cruden, Robert W.

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Embryophytes have Equivalent Sexual Phenotypes and Breeding Systems: Why Not a Common Terminology to Describe Them? von Cruden, Robert W., Lloyd, Robert M.

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pollination biology and breeding system of Monarda fistulosa (Labiatae) von Cruden, R.W, Hermanutz, L, Shuttleworth, J

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Temporal dioecism: systematic breadth, associated traits, and temporal patterns von Cruden, Robert William

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Butterfly pollination of Caesalpinia pulcherrima, with observations on a psychophilous syndrome von Cruden, R.W, Hermann-Parker, S.M

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Patterns of biomass allocation to male and female functions in plants with different mating systems von Cruden, R.W, Lyon, D.L

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The Reproductive Biology of Anemone canadensis (Ranunculaceae): Breeding System and Facilitation of Sexual Selection von Douglas, Kelly Lea, Cruden, Robert William

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The Adaptive Nature of Seed Germination in Nemophila Menziesii Aggr von Cruden, Robert William

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Pollination biology and breeding system of Alliaria petiolata (Brassicaceae) von Cruden, R.W, McClain, A.M, Shrivastava, G.P

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Correlations Among Stigma Depth, Style Length, and Pollen Grain Size: Do They Reflect Function or Phylogeny? von Cruden, Robert W., Lyon, David L.

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A previously unrecognized Isidrogalvia (Liliaceae) from Bolivia von Cruden, R.W. (University of Iowa, Iowa City, IA), Dorr, L.J

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A new Echeandia (Liliaceae) from Venezuelan Guayana von Cruden, R.W. (University of Iowa, Iowa City, IA)

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Birds as Agents of Long-Distance Dispersal for Disjunct Plant Groups of the Temperate Western Hemisphere von Cruden, Robert William

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Pollen-Ovule Ratios: A Conservative Indicator of Breeding Systems in Flowering Plants von Cruden, Robert William

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Hagenbachia (Liliaceae): Reexamination of Its Familial Placement, Its Authors, the Lectotype, and Other Collections von Cruden, Robert William, Paul J. M. Maas, de Kamer, Hiltje Maas-van

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Thrips-Mediated Self-Pollination of Two Facultatively Xenogamous Wetland Species von Baker, James Dillon, Cruden, Robert William

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A revision of Isidragalvia (Liliaceae) : recognition for Ruíz and Pavón's genus von CRUDEN, R. W

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A New Subgenus and Fifteen New Species of Echeandia (Anthericaceae) from Mexico and the United States von Cruden, Robert William

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The reproductive biology of Anemone canadensis (Ranunculaceae): breeding system and facilitation of sexual selection von Douglas, K.L, Cruden, R.W

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