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您的检索式：作者名="Mark P.SIMMONS"
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| 1 | Contribution of molecular cladistics to the taxonomy of Rutaceae in China显示文摘The treatment of Rutaceae in the Chinese flora chose to follow Engler in recognizing Rutoideae and Toddalioideae as two separate subfamilies.Morphological and chemical comparisons,however,suggested group-ing those two subfamilies in one subfamily,Rutoideae.This move has received support from molecular phyloge-netic analyses,which also showed that the Chinese taxa in Euodia should be placed in Tetradium and Melicope following Hartley.Investigations into the chemistry and molecular phylogeny of Murraya also indicated that the species in the section Bergera without yuehchukene should be removed from Murraya.These findings clearly show the value of molecular cladistics to the taxonomy of Rutaceae in China and also directions for further inves-tigations. | Paul Pui-Hay BUT Alice Wing-Sem POON Pang-Chui SHAW Mark P.SIMMONS Harald GREGER | 2009 | Journal of Systematics and Evolution2009，47，2： | 2 |
| 2 | Thistle be a mess:Untangling the taxonomy of Cirsium(Cardueae:Compositae)in North America显示文摘Cirsium(i.e.,“thistles”)are one of the most taxonomically challenging groups of Compositae in North America.This study represents the first attempt to infer a broadly sampled phylogeny of Cirsium in North America.The two main objectives are to:(i)test whether currently hypothesized species variety complexes(C.arizonicum,C.clavatum,C.eatonii,and C.scariosum)constitute monophyletic lineages,and(ii)recircumscribe any taxa that are identified as problematic.Phylogeny reconstructions based on DNA sequence data from two nuclear ribosomal regions and four plastid markers were used to infer evolutionary lineages and test species’delimitations.Eight species varietal complexes were resolved as polyphyletic.We recircumscribed these complexes and in doing so found evidence to support the recognition of six new taxa.We hypothesize that the extensive taxonomic difficulty within Cirsium is the result of several factors:(i)previously undescribed taxa,(ii)inadequate representation of taxa from herbarium specimens,(iii)phenotypic convergence,(iv)hybridization,and(v)incipient speciation.While we can provide evidence to support the recircumscription of some taxa,others remain unresolved.Therefore,we are working on a phylogenomic study of North American Cirsium to answer remaining taxonomic questions as well as provide a robust framework for biogeographic studies. | Jennifer R.Ackerfield David J.Keil Wendy C.Hodgson Mark P.Simmons Shannon D.Fehlberg Vicki A.Funk | 2020 | Journal of Systematics and Evolution2020，58，6： | 0 |
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