| Upper Paleozoic floral zones and floral provinces of the United States CB Read, SH Mamay US Government Printing Office, 1964 | 293 | 1964 |
| Paleozoic origin of the cycads SH Mamay Professional paper, 1976 | 173 | 1976 |
| An Early Permian flora with Late Permian and Mesozoic affinities from north-central Texas WA DiMICHELE, SH Mamay, DS Chaney, RW Hook, WJ Nelson Journal of Paleontology 75 (2), 449-460, 2001 | 153 | 2001 |
| Some American carboniferous fern fructifications SH Mamay Annals of the Missouri Botanical Garden 37 (3), 409-476, 1950 | 128 | 1950 |
| Cycads: fossil evidence of late Paleozoic origin SH Mamay Science 164 (3877), 295-296, 1969 | 94 | 1969 |
| Occurrence and significance of marine animal remains in American coal balls SH Mamay, EL Yochelson Professional Paper, 1962 | 76 | 1962 |
| Foliar morphology and anatomy of the gigantopterid plant Delnortea abbottiae, from the Lower Permian of West Texas SH Mamay, JM Miller, DM Rohr, WE Stein Jr American Journal of Botany 75 (9), 1409-1433, 1988 | 67 | 1988 |
| Early Virgilian plant megafossils from the Kinney Brick Company Quarry, Manzanita Mountains, New Mexico SH Mamay, G Mapes New Mexico Bureau of Mines and Mineral Resources Bulletin 138, 61-85, 1992 | 60 | 1992 |
| Evolsonia, a new genus of Gigantopteridaceae from the Lower Permian Vale Formation, north‐central Texas SH Mamay American Journal of Botany 76 (9), 1299-1311, 1989 | 51 | 1989 |
| Russellites, new genus, a problematical plant from the Lower Permian of Texas SH Mamay Professional Paper, 1968 | 49 | 1968 |
| The Enigmatic Paleozoic plants Spermopteris and Phasmatocycas reconsidered BJ Axsmith, R Serbet, M Krings, TN Taylor, EL Taylor, SH Mamay American Journal of Botany 90 (11), 1585-1595, 2003 | 47 | 2003 |
| Archaeocalamites lazarii, sp. nov.: the range of Archaeocalamitaceae extended from the lowermost Pennsylvanian to the mid‐Lower Permian SH Mamay, RM Bateman American Journal of Botany 78 (4), 489-496, 1991 | 47 | 1991 |
| New species of Gigantopteridaceae from the Lower Permian of Texas SH Mamay Phytologia 61, 311-315, 1986 | 47 | 1986 |
| Gigantonoclea in the lower Permian of Texas SH Mamay Phytologia (USA), 1988 | 44 | 1988 |
| Biscalitheca, a new genus of Pennsylvanian coenopterids, based on its fructification SH Mamay American Journal of Botany 44 (3), 229-239, 1957 | 41 | 1957 |
| Auritifolia gen. nov., Probable Seed Plant Foliage with Comioid Affinities from the Early Permian of Texas, U.S.A. DS Chaney, SH Mamay, WA DiMichele, H Kerp International Journal of Plant Sciences 170 (2), 247-266, 2009 | 40 | 2009 |
| Archaeocycas and Phasmatocycas—new genera of Permian cycads SH Mamay US Geol Surv J Res 1, 687-689, 1973 | 37 | 1973 |
| Additions to the flora of the Spotted Ridge Formation in central Oregon SH Mamay, CB Read US Government Printing Office, 1956 | 37 | 1956 |
| A new American species of Bowmanites HN Andrews Jr, SH Mamay Botanical Gazette 113 (2), 158-165, 1951 | 36 | 1951 |
| Lower Permian plants from the Arroyo formation in Baylor county, North-central Texas SH Mamay US Geological Survey Professional Paper 575, C120-C126, 1967 | 35 | 1967 |
