Swenson, U., S. Nylinder & S. J. Wagstaff. Are Asteraceae 1.5 billion years old? A reply to Heads. Systematic Biology 61: 522-532.
Swenson, U. & J. Munzinger. Revision of Pichonia (Sapotaceae) for New Caledonia. Australian Systematic Botany 25: 31-48.
Nylinder, S., U. Swenson, C. Persson & B. Oxelman. A dated species tree approach to the trans-Pacific disjunction of the genus Jovellana (Calceolariaceae, Lamiales). Taxon 61: 381-391.
Terra-Araujo, M. T., A. D. de Faria, J. E. L. S. Ribeiro & U. Swenson. Flower biology and subspecies concepts in Micropholis guyanensis (Sapotaceae): Evidence of ephemeral flowers in the family. Australian Systematic Botany 25: 295-303.
2011
Bartish, I. V., A. Antonelli, J. Richardson & U. Swenson. Vicariance or long-distance dispersals: Historical biogeography of the pantropical subfamily Chrysophylloideae (Sapotaceae). Journal of Biogeography 38: 177-190..
Swenson, U., S. Nylinder & S. J. Wagstaff. Are Asteraceae 1.5 billion years old? A reply to Heads. Systematic Biology 60: (in press).
Swenson, U. Det totala antalet nybeskrivna växtarter - en svensk flora om året. Fauna & Flora 106: 18-26.
Swenson, U. & J. Munzinger. Revision of Pichonia (Sapotaceae) for New Caledonia. Australian Systematic Botany 24: (in press).
2010
Swenson, U. Restaurering av Gredelby hagar och Trunsta träsk i Knivsta (Uppland). Svensk Botanisk Tidskrift 104: 101-114.
Swenson, U. & J. Munzinger. Revision of Pycnandra subgenus Achradotypus(Sapotaceae) with five new species from New Caledonia. Australian Systematic Botany 23: 185 - 216.
Swenson, U. & J. Munzinger. Taxonomic revision of Pycnandra subgenus Trouettia (Sapotaceae) with six new species from New Caledonia. Australian Systematic Botany 23: 333-370.
Swenson, U. & J. Munzinger. Revision of Pycnandra subgenus Sebertia (Sapotaceae) and a generic key to the family in New Caledonia. Adansonia 32: 239 -249.
Stork, A. L. & U. Swenson. Exkursioner på Kanarieöarna år 1962 med Eric Sventenius. Svensk Botanisk Tidskrift 104: 370-392.
2009
Swenson, U. & J. Munzinger. Revision of Pycnandra subgenus Pycnandra (Sapotaceae), a genus endemic to New Caledonia. Australian Systematic Botany 22: 437-465.
Munzinger, J. & U. Swenson. Three new species of Planchonella (Sapotaceae) with dichotomous and an online key to the genus in New Caledonia. Adansonia 31: 175-189.
Swenson, U. & A. Tehler. Proposal to conserve the name Beccariella (Sapotaceae, Magnoliophyta) against Beccariella (Podoscyphaceae, Basidiomycota). Taxon 58: 654.
2008
Swenson, U., P. P Lowry II, J. Munzinger, C. Rydin & I. V. Bartish. Phylogeny and generic limits in the Niemeyera complex of New Caledonian Sapotaceae: Evidence of multiple origins of the anisomerous flower. Molecular Phylogenetics and Evolution 49: 909-929.
Swenson, U., J. Richardson & I. V. Bartish. Multi-gene phylogeny of the pantropical subfamily Chrysophylloideae (Sapotaceae): Evidence for generic polyphyly and extensive morphological homoplasy. Cladistics 24: 1006-1031.
Swenson, U. & P. Morat. Proposal to conserve the name Planchonella nom. cons. against the additional names Iteiluma and Peuceluma (Sapotaceae). Taxon 57: 1013-1014.
Norrmann, G. A., U. Swenson & I. Caponio. Two new species of Andropogon (Poaceae) from Cuba. Darwiniana 46: 328-334.
2007
Swenson, U., I. V. Bartish & J. Munzinger. Phylogeny, diagnostic characters, and generic limitation of Australasian Chrysophylloideae (Sapotaceae, Ericales): Evidence from ITS sequence data and morphology. Cladistics 23: 201-228.
Swenson, U., J. Munzinger & I. V. Bartish. Molecular phylogeny of Planchonella (Sapotaceae) and eight new species from New Caledonia. Taxon 56: 329-354.
Swenson, U., K. Martinsson & K. Eiderbrant. Eric Ragnar Sventenius - arbetarsonen som blev trädgårdsdirektör på Gran Canaria. Svensk Botanisk Tidskrift 101: 247-266.
2006
Schneider, J. V., U. Swenson, R. Samuel, T. Stuessy & Georg Zizka. Phylogeny of Quiinaceae (Malpighiales): Evidence from trnL-trnF sequence data and morphology. Plant Systematics and Evolution 257: 189-203.
Wagstaff, S., I. Breitwieser & U. Swenson. Origin and relationships of the austral genus Abrotanella (Asteraceae) inferred from DNA sequences. Taxon 55: 95-106.
Smedmark, J. E. E., U. Swenson & A. A. Anderberg. Accounting for variation of substitution rates through time in Baysian phylogeny reconstruction of Sapotoideae (Sapotaceae). Molecular Phylogenetics and Evolution 39: 706-721.
2005
Swenson, U. & A. A. Anderberg. Phylogeny, character evolution, and classification of the Sapotaceae (Ericales). Cladistics 21: 101-130.
Swenson, U. & K. Martinsson. Restaurering av hagmarker - hur man kan få bukt med örnbräken. Svensk Botanisk Tidskrift 99: 339-346.
Bartish, I. V., U. Swenson, J. Munzinger & A. A. Anderberg. Phylogenetic relationships among New Caledonian Sapotaceae (Ericales): Molecular evidence for polyphyly and repeated dispersal between Australia and New Caledonia. American Journal of Botany 92: 667-673.
2004
Bartish, I. V. & U. Swenson. Elaeagnaceae. Pages131-134 in K. Kubitzki (ed.). The families and genera of vascular plants. Springer Verlag, Berlin.
Swenson, U. Pericallis (Asteraceae) - ett färgstarkt släkte med rötter i Makaronesien. Svensk Botanisk Tidskrift 98: 193-206.
2003
Swenson, U. & U. Manns. Phylogeny of Pericallis (Asteraceae): A total evidence approach reappraising the double origin of woodiness. Taxon 52: 533-546.
Anderberg, A. A. & U. Swenson. Evolutionary lineages in Sapotaceae (Ericales): A cladistic analysis based on ndhF sequence data. International Journal of Plant Sciences 164: 763-773.
2002
Bartish, I. V., N. Jeppsson, H. Nybom, and U. Swenson Phylogeny of Hippophae (Elaeagnaceae) inferred from parsimony analysis of chloroplast DNA and morphology. - Systematic Botany 27: 41-54.
Schneider, J., U. Swenson, and G. Zizka Phylogenetic reconstruction of the neotropical family Quiinaceae (Malpighiales) based on morphology and a model for the evolution of an androdioecious sex distribution. - Annales of the Missouri Botanical Garden 89: 64--76.
Swenson, U. Spridning eller vikarians - biogeografernas dilemma exemplifierat med Nothofagus. - Svensk Botanisk Tidskrift 96: 42-52.
Greimler, J., T. F. Stuessy, U. Swenson, C. M Baeza, and O. Matthei Plant invasion on an oceanic archipelago. Biological Invasions 4: 73-85.
2001
Swenson, U., A. Backlund, S. McLoughlin, and R. S. Hill Nothofagus biogeography revisited with special emphasis to the enigmatic distribution of subgenus Brassospora in New Caledonia. - Cladistics 17: 28-47.
Swenson, U. and R. S. Hill Most parsimonious areagrams versus fossils: the case of Nothofagus (Nothofagaceae). Australian Journal of Botany 49: 367-376.
Swenson, U. Carl Skottsberg och Juan Fernandez-öarna - historiska perspektiv på en unik växtvärld i farozonen. - Svensk Botanisk Tidskrift 95: 144-157.
Swenson, U., R. S. Hill, and S. McLoughlin Biogeography of Nothofagus supports the sequence of Gondwana break-up. - Taxon 50: 1025-1041.
Crawford, D. J., E. Ruiz, G. J. Anderson, T. F. Stuessy, P. Aqueveque, F. Gonzalez, E. Tepe, M. Silva O., U. Swenson, and R. Jensen Allozyme variation in flowering plant species of the Juan Fernandez archipelago, Chile: Ecological and historical factors with implications for conservation. - American Journal of Botany 88: 2195-2203.
Bremer, K., A. Backlund, B. Sennblad, U. Swenson, K. Andreasen, M. Hjertson, J. Lundberg, M. Backlund, and B. Bremer A phylogenetic analysis of 100+ genera and 50+ families of euasterids based on morphological and molecular data. - Plant Systematics and Evolution 229: 137-169.
2000
Swenson, U., R. S. Hill, and S. McLoughlin Ancestral area analysis of Nothofagus (Nothofagaceae) and its congruence with the fossil record. - Australian Systematic Botany 13: 469-478.
Wagstaff, S. J., K. Martinsson, and U. Swenson Divergence estimates of Tetrachondra hamiltonii and T. patagonica (Tetrachondraceae) and their implications for austral biogeography. - New Zealand Journal of Botany 38: 587-596.
Sandhall, Å and U. Swenson Växter från varma länder: Kanarieöarna, Madeira och Medelhavsområdet. Interpublishing, Stockholm.
1999
Swenson, U. Lediga rutor i Uppsala kommun. - Daphne 10: 24-25.
Swenson, U., J. Y. Yang, and B. A. Bohm Flavonoid chemistry of Blennospermatinae, a trans-Pacific disjunct subtribe of Senecioneae (Asteraceae). - Plant Systematics and Evolution 216: 231-241.
Swenson, U. and K. Bremer On the circumsription of the Blennospermatinae (Asteraceae, Senecioneae) based on ndhF sequence data. - Taxon 48: 7-14.
1998
Stuessy, T. F., U. Swenson, C. Marticorena, O. Matthei, and D. Crawford Loss of plant diversity and extinction on Robinson Crusoe Islands, Chile. Pages 243-257 in: C.-I. Peng and P. P. Lowry (eds.). Rare, Threatened, and Endangered Floras of Asia and the Pacific Rim. Institute of Botany, Academia Sinica, Taipei.
Stuessy, T. F., U. Swenson, D. Crawford, G. Anderson, and M. Silva, O. Plant conservation in the Juan Fernandez Archipelago, Chile. - Aliso 16: 89-101.
Swenson, U. Upplands Flora - inventeringsläget i Uppsala kommun. - Daphne 9: 36-37.
1997
Swenson, U. and K. Bremer Patterns of floral evolution of four Asteraceae genera (Senecioneae, Blennospermatinae) and the origin of white flowers in New Zealand. - Systematic Biology 46: 407-425.
Swenson, U. and K. Bremer Pacific biogeography of the Asteraceae genus Abrotanella (Senecioneae, Blennospermatinae). - Systematic Botany 22: 493-508.
Swenson, U., T. F. Stuessy, M. Baeza, and D. Crawford New and historical plant introductions, and potential pests in the Juan Fernandez Islands, Chile. - Pacific Science 51: 233--253.
1996
Swenson, U. Abrotanella rostrata (Asteraceae, Senecioneae), a new species for New Zealand. - New Zealand Journal of Botany 34: 47-50.
Swenson, U. and P. Garnock-Jones Two new records of Asteraceae from Tongariro National Park. - New Zealand Botanical Society Newsletter 43: 6-7.
Swenson, U., T. F. Stuessy, M. Baeza, and D. J. Crawford Introduced plants and conservation in the Juan Fernandez Islands, Chile. - American Journal of Botany 83: 196 (abstract 561).
1995
Swenson, U. Systematics of Abrotanella, an amphi-Pacific Genus of Asteraceae (Senecioneae). - Plant Systematics and Evolution 197: 149-193.
Swenson, U. Systematics of the Blennospermatinae (Asteraceae, Senecioneae), 155pp. Acta Universitatis Upsaliensis, Uppsala (doctoral thesis).
1994
Swenson, U. The genus Ischnea (Asteraceae, Senecioneae) in New Guinea. - Plant Systematics and Evolution 191: 247-263.
Swenson, U. and K. Bremer. The genus Lagenocypsela (Asteraceae, Astereae) in New Guinea. - Australian Systematic Botany 7: 265-273.
1993
Swenson, U. The identity of Abrotanella christenseni Petrie (Asteraceae). - Compositae Newsletter 23: 3-6.
1990
Sjöberg, A. and U. Swenson. Gitoro Forest, Meru District, Kenya - a survey of the vegetation with socio-cultural perspectives on plants. Sveriges Lantbruks-universitet (IRDC), Working Paper 149.