Kaj Vollesen

574 total citations
57 papers, 434 citations indexed

About

Kaj Vollesen is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Molecular Biology. According to data from OpenAlex, Kaj Vollesen has authored 57 papers receiving a total of 434 indexed citations (citations by other indexed papers that have themselves been cited), including 47 papers in Ecology, Evolution, Behavior and Systematics, 38 papers in Plant Science and 16 papers in Molecular Biology. Recurrent topics in Kaj Vollesen's work include Plant Diversity and Evolution (39 papers), African Botany and Ecology Studies (16 papers) and Plant and Fungal Species Descriptions (14 papers). Kaj Vollesen is often cited by papers focused on Plant Diversity and Evolution (39 papers), African Botany and Ecology Studies (16 papers) and Plant and Fungal Species Descriptions (14 papers). Kaj Vollesen collaborates with scholars based in United Kingdom, Denmark and United States. Kaj Vollesen's co-authors include Lucinda A. McDade, Carrie A. Kiel, Thomas F. Daniel, Ib Friis, Ruth Kiew, Iain Darbyshire, M. G. Gilbert, Carol A. Furness, Elmar Robbrecht and Hazel Chapman and has published in prestigious journals such as Taxon, Systematic Botany and Kew Bulletin.

In The Last Decade

Kaj Vollesen

50 papers receiving 364 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Kaj Vollesen United Kingdom	10	335	198	193	44	30	57	434
G. Lewis United Kingdom	9	355 1.1×	139 0.7×	202 1.0×	50 1.1×	68 2.3×	31	483
L.A. Craven Australia	12	307 0.9×	256 1.3×	274 1.4×	23 0.5×	31 1.0×	48	485
Charles Jeffrey Russia	6	239 0.7×	179 0.9×	202 1.0×	16 0.4×	16 0.5×	12	396
Nadja Diane Germany	8	289 0.9×	181 0.9×	204 1.1×	23 0.5×	12 0.4×	8	368
Gemma L. C. Bramley United Kingdom	9	260 0.8×	273 1.4×	236 1.2×	24 0.5×	24 0.8×	32	431
Barry J. Conn Australia	12	372 1.1×	225 1.1×	249 1.3×	30 0.7×	75 2.5×	91	506
F.J. Breteler Netherlands	10	269 0.8×	125 0.6×	113 0.6×	76 1.7×	26 0.9×	80	344
Charles R. Gunn United States	13	259 0.8×	126 0.6×	248 1.3×	41 0.9×	16 0.5×	33	416
Therezinha Sant'Anna Melhem Brazil	7	294 0.9×	109 0.6×	134 0.7×	14 0.3×	25 0.8×	22	377
George W. Staples United States	13	447 1.3×	276 1.4×	270 1.4×	15 0.3×	26 0.9×	73	577

Countries citing papers authored by Kaj Vollesen

Since Specialization

Citations

This map shows the geographic impact of Kaj Vollesen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kaj Vollesen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kaj Vollesen more than expected).

Fields of papers citing papers by Kaj Vollesen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kaj Vollesen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kaj Vollesen. The network helps show where Kaj Vollesen may publish in the future.

Co-authorship network of co-authors of Kaj Vollesen

This figure shows the co-authorship network connecting the top 25 collaborators of Kaj Vollesen. A scholar is included among the top collaborators of Kaj Vollesen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Kaj Vollesen. Kaj Vollesen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Kalema, James, et al.. (2024). Flora of Sango Bay and Minziro, Two Important Plant Areas on the Uganda/Tanzania Border. 113(7).

Vollesen, Kaj, et al.. (2022). Chlorophytum delicatulum (Asparagaceae), a newly described species from Zambia. Kew Bulletin. 77(3). 675–684.

Jongkind, Carel C. H. & Kaj Vollesen. (2011). Justicia jamisonii Jongkind & Vollesen (Acanthaceae), a new species from Guinée, Côte d’Ivoire and Kenya. Kew Bulletin. 66(4). 609–611. 1 indexed citations

Friis, Ib, et al.. (2010). Zanthoxylum gilletii (Rutaceae) - a mainly guineo-congolian forest tree with a newly discovered disjunction to western Ethiopia.. Research at the University of Copenhagen (University of Copenhagen). 193–201. 1 indexed citations

Darbyshire, Iain, Kaj Vollesen, & Hazel Chapman. (2008). A remarkable range disjunction recorded in Metarungia pubinervia (Acanthaceae). Kew Bulletin. 63(4). 613–615. 5 indexed citations

McDade, Lucinda A., Thomas F. Daniel, Carrie A. Kiel, & Kaj Vollesen. (2005). Phylogenetic Relationships among Acantheae (Acanthaceae): Major Lineages Present Contrasting Patterns of Molecular Evolution and Morphological Differentiation. Systematic Botany. 30(4). 834–862. 70 indexed citations

Vollesen, Kaj. (2002). Three New Species of Blepharis (Acanthaceae). Kew Bulletin. 57(2). 451–451. 6 indexed citations

Vollesen, Kaj, et al.. (2002). A New Species of Justicia (Acanthaceae) from India. Kew Bulletin. 57(1). 231–231. 1 indexed citations

Vollesen, Kaj. (1999). Cynarospermum, a New Genus of Acanthaceae from India. Kew Bulletin. 54(1). 171–171. 2 indexed citations

10.

Friis, Ib, B. Verdcourt, & Kaj Vollesen. (1996). New Combinations in African Sapindaceae. Kew Bulletin. 51(4). 802–802.

11.

Vollesen, Kaj. (1994). Delimitation of Angkalanthus (Acanthaceae: Justicieae) and the New Genus Chorisochora. Kew Bulletin. 49(3). 469–469. 3 indexed citations

12.

Vollesen, Kaj. (1992). The Old World Species of Stenandrium (Acanthaceae: Acantheae). Kew Bulletin. 47(2). 169–169. 15 indexed citations

13.

Vollesen, Kaj. (1991). A Revision of the African Genus Sclerochiton (Acanthaceae: Acantheae). Kew Bulletin. 46(1). 1–1. 7 indexed citations

14.

Vollesen, Kaj. (1990). The Genus Crossandra (Acanthaceae) in the African Continent. Kew Bulletin. 45(3). 503–503. 10 indexed citations

15.

Friis, Ib & Kaj Vollesen. (1989). Notes on the vegetation of the southernmost Somalia, with some additions to the flora. Research at the University of Copenhagen (University of Copenhagen). 10 indexed citations

16.

Friis, Ib, M. G. Gilbert, & Kaj Vollesen. (1987). Additions to the flora of Ethiopia, 2. Willdenowia - Annals of the Botanic Garden and Botanical Museum Berlin-Dahlem. 14(2). 355–371. 9 indexed citations

17.

Vollesen, Kaj. (1982). A New Species of Seychellaria (Triuridaceae) from Tanzania. Kew Bulletin. 36(4). 733–733. 2 indexed citations

18.

Vollesen, Kaj. (1981). A new species of Cordia (Boraginaceae) from Tanzania. Nordic Journal of Botany. 1(3). 325–328. 1 indexed citations

19.

Vollesen, Kaj. (1980). A review of Pleioceras (Apocynaceae) and P. orientale, sp. nov., from SE. Tanzania.. 75(1). 55–62. 1 indexed citations

20.

Vollesen, Kaj, et al.. (1980). The identity of the ethiopian monotypic genus tzellemtinia. 133(3). 347–350. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact