| Mutation, developmental selection, and plant evolution EJ Klekowski Columbia University Press, 1988 | 313 | 1988 |
| Reproductive biology of the Pteridophyta. III. A study of the Blechnaceae EJ KLEKOWSKI JR Botanical journal of the Linnean society 62 (3), 361-377, 1969 | 269 | 1969 |
| Spore germination and viability in Pteridophyta: evolutionary significance of chlorophyllous spores RM Lloyd, EJ Klekowski Jr Biotropica, 129-137, 1970 | 239 | 1970 |
| Reproductive biology of the Pteridophyta. II. Theoretical considerations EJ KLEKOWSKI JR Botanical Journal of the Linnean Society 62 (3), 347-359, 1969 | 217 | 1969 |
| Evolutionary significance of polyploidy in the Pteridophyta EJ Klekowski Jr, HG Baker Science 153 (3733), 305-307, 1966 | 217 | 1966 |
| Ageing and mutation in plants EJ Klekowski Jr, PJ Godfrey Nature 340 (6232), 389-391, 1989 | 208 | 1989 |
| Sexual and subsexual systems in homosporous pteridophytes: a new hypothesis EJ Klekowski Jr American Journal of Botany 60 (6), 535-544, 1973 | 154 | 1973 |
| The genetics and reproductive biology of ferns EJ Klekowski, AF Dyer The experimental biology of ferns, 133-170, 1979 | 139 | 1979 |
| Petroleum pollution and mutation in mangroves EJ Klekowski Jr, JE Corredor, JM Morell, CA Del Castillo Marine Pollution Bulletin 28 (3), 166-169, 1994 | 135 | 1994 |
| Plant clonality, mutation, diplontic selection and mutational meltdown EJ Klekowski Biological Journal of the Linnean Society 79 (1), 61-67, 2003 | 108 | 2003 |
| Reproductive biology of the Pteridophyta: 1. General considerations and a study of Onoclea sensibilis L. EJ KLEKOWSKI Jr, RM LLOYD Botanical Journal of the Linnean Society 60 (383), 315-324, 1968 | 106 | 1968 |
| Somatic mutation theory of clonality EJ Klekowski The ecology and evolution of clonal plants, 227-241, 1997 | 103 | 1997 |
| Genetic load in Osmunda regalis populations EJ Klekowski Jr American Journal of Botany 60 (2), 146-154, 1973 | 85 | 1973 |
| Shoot apical meristems and mutation: selective loss of disadvantageous cell genotypes EJ Klekowski Jr, N Kazarinova‐Fukshansky American Journal of Botany 71 (1), 28-34, 1984 | 83 | 1984 |
| Genetic load and its causes in long-lived plants EJ Klekowski Trees 2, 195-203, 1988 | 80 | 1988 |
| Evidence against genetic self-incompatibility in the homosporous fern Pteridium aquilinum EJ Klekowski Jr Evolution, 66-73, 1972 | 76 | 1972 |
| Antheridogen activity in the fern Ceratopteris thalictroides (L.) Brongn MD SCHEDLBAUER, EJ KLEKOWSKI JR Botanical Journal of the Linnean Society 65 (4), 399-413, 1972 | 74 | 1972 |
| Shoot apical meristems and mutation: fixation of selectively neutral cell genotypes EJ Klekowski Jr, N Kazarinova‐Fukshansky American journal of botany 71 (1), 22-27, 1984 | 72 | 1984 |
| POPULATIONAL AND GENETIC STUDIES OF A HOMOSPOROUS FERN—OSMUNDA REGALIS EJ Klekowski Jr American Journal of Botany 57 (9), 1122-1138, 1970 | 72 | 1970 |
| Mangrove genetics. I. Mating system and mutation rates of Rhizophora mangle in Florida and San Salvador Island, Bahamas R Lowenfeld, EJ Klekowski Jr International Journal of Plant Sciences 153 (3, Part 1), 394-399, 1992 | 67 | 1992 |
