| Plant systematics MG Simpson Academic press, 2019 | 1941 | 2019 |
| Familial classification of the Boraginales F Luebert, L Cecchi, MW Frohlich, M Gottschling, CM Guilliams, ... Taxon 65 (3), 502-522, 2016 | 201 | 2016 |
| The borage family (Boraginaceae s. str.): A revised infrafamilial classification based on new phylogenetic evidence, with emphasis on the placement of some enigmatic genera J Chacón, F Luebert, HH Hilger, S Ovchinnikova, F Selvi, L Cecchi, ... Taxon 65 (3), 523-546, 2016 | 175 | 2016 |
| Diversity and classification of flowering plants MG Simpson Plant systematics, 181-274, 2010 | 146 | 2010 |
| Phylogeny and classification of the Haemodoraceae MG Simpson Annals of the Missouri Botanical Garden, 722-784, 1990 | 97 | 1990 |
| Geneious! Simplified genome skimming methods for phylogenetic systematic studies: A case study in Oreocarya (Boraginaceae) LA Ripma, MG Simpson, K Hasenstab‐Lehman Applications in Plant Sciences 2 (12), 1400062, 2014 | 95 | 2014 |
| Phylogenetic relationships in the Commelinaceae: I. A cladistic analysis of morphological data TM Evans, RB Faden, MG Simpson, KJ Sytsma Systematic Botany 25 (4), 668-691, 2000 | 87 | 2000 |
| Cat's eyes and popcorn flowers: Phylogenetic systematics of the genus Cryptantha sl (Boraginaceae) KE Hasenstab-Lehman, MG Simpson Systematic Botany 37 (3), 738-757, 2012 | 77 | 2012 |
| Pollen ultrastructure of the Haemodoraceae and its taxonomic significance MG Simpson Grana 22 (2), 79-103, 1983 | 76 | 1983 |
| American amphitropical disjuncts: Perspectives from vascular plant analyses and prospects for future research MG Simpson, LA Johnson, T Villaverde, CM Guilliams American Journal of Botany 104 (11), 1600-1650, 2017 | 62 | 2017 |
| Checklist of the vascular plants of San Diego County JP Rebman, MG Simpson San Diego Natural History Museum, 2006 | 54 | 2006 |
| Pollen ultrastructure of the Pontederiaceae: evidence for exine homology with the Haemodoraceae MG Simpson Grana 26 (2), 113-126, 1987 | 48 | 1987 |
| Reversal in ovary position from inferior to superior in the Haemodoraceae: evidence from floral ontogeny MG Simpson International Journal of Plant Sciences 159 (3), 466-479, 1998 | 43 | 1998 |
| Septal nectary anatomy and phylogeny of the Haemodoraceae MG Simpson Systematic Botany, 593-613, 1993 | 42 | 1993 |
| Phylogeny of the popcorn flowers: Use of genome skimming to evaluate monophyly and interrelationships in subtribe Amsinckiinae (Boraginaceae) MG Simpson, CM Guilliams, KE Hasenstab-Lehman, ME Mabry, L Ripma Taxon 66 (6), 1406-1420, 2017 | 41 | 2017 |
| Phylogenetic implications of pollen ultrastructure in the Oldfieldioideae (Euphorbiaceae) GA Levin, MG Simpson Annals of the Missouri Botanical Garden, 203-238, 1994 | 40 | 1994 |
| Ultrastructure of Heterocolpate Pollen in Cryptantha (Boraginaceae) L Hargrove, MG Simpson International Journal of Plant Sciences 164 (1), 137-151, 2003 | 39 | 2003 |
| Pollen ultrastructure of the biovulate Euphorbiaceae MG Simpson, GA Levin International Journal of Plant Sciences 155 (3), 313-341, 1994 | 33 | 1994 |
| Pollen ultrastructure of the Tecophilaeaceae MG Simpson Grana 24 (2), 77-92, 1985 | 33 | 1985 |
| Plant morphology MG Simpson Plant Systematics (Second Edition). Academic Press, San Diego, 451-513, 2010 | 30 | 2010 |
