IGG Digital Library and Booklist


  • A Monograph of Monsonia L., by Hendrik Johannes Tjaart Venter, PhD Thesis, University of the Orange Free State, 1980. 25 species illustrated in line drawings by Juliet Williamson and Yuen Fang Tan. Chapters on ecology, geographic distribution, taxonomic position, evolutionary trends. Sarcocaulon not yet included as a section. Download the entire volume here (51.3 MB).


  • Taxonomic studies in Pelargonium Section Hoarea, by E. M. Marais, 1994, ISBN 1-899742-42-5. 60 species illustrated full-page in black & white. Artist Ellaphie WardHilhorst. Tuberous species, including DNA and chromosome data; chapters on taxonomy, pollen, comparative morphology, maps, ecology, synonymy. Download the entire volume here (130 MB).
    • Part 1 (35.6 MB) – Introduction; Materials and Methods; Macromorphology; Leaf Anatomy; Palynology; Geographical Distribution, Ecology and Pollination; Discussion and Conclusions
    • Part 2 (30.8 MB) – Taxonomic Treatment; Fissifolium Group; Pinnatum Group; Attenuatum Group; Proliferum Group
    • Part 3 (44.1 MB)Heterophyllum Group; Aciculatum Group; Luteum Group; Incrassatum Group; Luteolum Group; Rapaceum Group
    • Part 4 (31.5 MB) – Auritum Group; Triphyllum Group; Punctatum Group; Insufficiently Known Species; Acknowledgments, References; Index
  • Revision der Pelargonium-Sektion Peristera (Geraniaceae), Revision of Pelargonium section Peristera (Geraniaceae), by D. Hellbrügge, PhD Thesis, Westfällische Wilhelms-Universität Münster, 1997. In German. Download the entire volume here (41.4 MB).

For an extensive collection of scientific literature on Pelargonium, please consult this webpage, containing many links to open access articles.

IGG Species Check-lists (Geraniales Vol. 1)

All A4 size paperback 1-899742-00-X. Edition 5: includes corrections from the professional botanists working on the genus up to 1994, and includes all latinised names for the 5 core genera and Hypseocharis. Download the volumes here (Members only).

  • Part 1, Erodium, ed. 5, ISBN 1-899742-63-8; 224 pages. Taxonomy, complete species analysis, advisor G. G. Guittonneau, Orleans. Ecology, notes especially for the Eastern Mediterranean species.
  • Part 2, Geranium, ed. 5, 2004, ISBN 1-899742-61-1, 169 pages. All latinised names, synonyms too; many descriptions, ecology, notes. Advisor P. F. Yeo.
  • Part 3, Monsonia, ed. 5, 2011, ISBN 1-899742-03-4. All species described. Checked against Venter’ s Monograph.
  • Part 4, Pelargonium, ed. 5, 2004, ISBN 1-899742-60-3, 178 pages. 284 species, many descriptions. Advisors: J. J. A. van der Walt, P. Vorster, E. M. Marais, M. Gibby.
  • Part 5, Sarcocaulon, ed. 5, 2011, ISBN 1-899742-05-0. All species described; improved data and coordinate with Monsonia. Checked against Moffett’ s Monograph.


Geraniaceae Group Publications

The International Geraniaceae Group no longer operates the Group Bookshop. However, we are doing our level best to make many of the titles available digitally on this website. 

What follows is a selection of specialised publications (that are not available digitally), some of which may be available in libraries or specialised collections. At the bottom of the page is a list of titles in languages other than English.


  • Pelargonium: the Sections, Historically Reviewed, collated by R. Clifton, 2000. ISBN 1-899742-46-8. The full story to 1996, an examination of botanists’ conflicting views & inadequate data, as published.
  • Pelargonium Section Polyactium, by R. Clifton, 1998, ISBN 1-899742-35-2. Size A5. Complete examination of botanists’ conflicting views and inadequate data for these usually tuberous species, with a checklist of names, synonyms and hybrids.
  • Inter-species Hybrids of Pelargonium, compiled by R. Clifton, Size A4, 50 pages. Sections by chromosome in preface. Section and chromosome number for each species, then hybrid record if any.
  • The Natural Habitat and Cultivation of some Southern African Succulent Pelargoniums, by C. Craib, 1992. Size A5, 25 pages.

Pelargonium Cultivars

  • The Wisley Guide to Pelargoniums, by Hazel Key, 1993. Wisley Guide layout, colour pics, cultivars only.
  • The Passion for Pelargoniums, by A. Wilkinson, 2007. ISBN-13: 9780-7509-4428-1. Pelargonium history and people, narrative; not a reference book but a great read.
  • Pelargonium: Extract from RHS 1800-1901, by R. Clifton, 2007. Size A5, 408 pages. Including the Trials; cultivar index; analysys of state of RHS affairs at each volume.
  • Zonal Pelargoniums: A History at 1896. Size A5, 148 pages. H. Dauthenay translated book, French page on right, English on Left; about 5000 Zonal Pelargoniums traced for France; development of doubles, dwarfs, giants, coloured leaf “races”.


  • Hardy Geraniums, by P. F. Yeo, ed. 2, ISBN (UK) 0-7134-8500-0. 218 pages, 206 illustr. (56 in colour). This is the work on geraniums in cultivation. Each species meticulously described with discussion of cultivars and hybrids.
  • Revision of Geranium subg. Erodioidea, by C. Aedo, Syst. Bot. Mon. 49, 1996. ISBN 0-912861-49-5. 103 pages, b&w illus.. This is largely the “G. cinereum complex” with a few others that seem morphologically related.
  • Gardening with Hardy Geraniums, By B. Husted Bendtsen, English edn. 2005. Brilliant colour plates, with chapters on cultivation.
  • The Gardener’s Guide to Growing Hardy Geraniums, by T. Bath and J. Jones, 1994. Lots of colour figs; chapters by varied growers.
  • My Experience Growing Hardy Geraniums, by P. Noble, 1994. Size ~A4, 40 pages, b&w drawings. Canadian cultivation and garden advice.
  • The Wisley Guide to Hardy Geraniums, by Dr D. Hibberd, 2003. A5 booklet, 45 colour figures, A-Z cultivar list.
  • RHS Wisley Geranium Trials 2004, 2005, 2006, by Mr. Armitage. Size A4, 3 booklets in colour.

Monsonia and Sarcocaulon

  • Genus Sarcocaulon, by R. O. Moffett. This monography is one of the 18 papers included in our title “Proceedings” cf below. Black & white illustrations, maps, taxonomy.
  • Sarcocaulon of Southern Africa, by C. Craib, 1995, A5 booklet, no illustrations, 60 pages.
  • Caudiciform Geraniaceae, by A. Rodriguez, The New Plantsman Dec. 1999. 8 pages.


  • Contribution a L’etude biosystematique du genre Erodium L’Her. dans le bassin mediterraneen occidental, by G. G. Guittonneau, 1972, Boissiera vol. 20. In French, technical, this is the most comprehensive and recent work on the genus. A remarkable, painstaking, thorough examination of West Mediterranean species. N&S shores, including hybridisation studies and their evolutionary implications. The East Mediterranean species are unlikely ever to receive such good coverage, despite having this as a template for the work.
  • Erodium: Progress in Experimental Systematics, by G. G. Guittonneau, 1987. Translation sponsored by G. Robbins 1995, 8 page leaflet. Some further results after 1972.
  • Nouvelle Interpretation de L’Erodium valentinum de l’Espagne, by G. G. Guittonneau, Romero & Sanz, 1991. In French, with the latest distribution map for Subsect. Petraea in Spain.
  • Erodium bibliography 1997, 28 page leaflet.
  • Erodium in Garden Books 1857-1993. Geraniaceae Group Associated Note 21. Examines garden accounts for the genus; a critical review tracking errors.

Titles on Many Genera

  • Botany of the Geraniaceae – Historically Reviewed, by R. Clifton, 1998. ISBN 1-899742-31-X. Size A5, 96 pages. Explains why the term “Family Geraniaceae” is imprecise and shows how the concepts developed and then fragmented. This is the full story to 1996.
  • Proceedings of the International Geraniaceae Symposium, Stellenbosch 1990, ed. by P. Vorster, Geraniaceae Group reprint 1994, ISBN 1-899742-11-5. 356 pages, b&w illus. 18 papers; including evolutionary trends by P. F. Yeo, Sarcocaulon by Prof. Moffett, Monsonia by Prof. Venter, Hypseocharis by Dr. Link, etc.
  • Geraniaceae Knuth Tribes 2-3-4-5, (Geraniales Checklist series, vol. 4) by R. Clifton. ISBN 1-899742-4-9. 24 pages. Compiled from botanical sources. Part 1: Geraniaceae Link (Biebersteinia, Rhyncotheca) and Vivianaceae Lefor (Viviania, Caesarea, Araeoandra, Cissarobryon); Part 2: Balbisia, Dirachma, (Aitonia), Wendtia.
  • Index to The Figures of Knuth, by R. Clifton, 1995. 8 pages, no ISBN. Updates id’s of the figures, from professional botanists’ statements, to modern names + cross-index at end. A few comments but no text.
  • Geraniaceae & The Linnaeus Typification Project, compiled by R. Clifton, 1999. ISBN 1-899742-38-7. Size A5. 224 pages pseudo-facsimiles, checklist, typification data, checklists. Linnaeus began the Binomial System and many botanical names date from his publications; this sorts them out for “Geraniaceae”; typification data assisted by C. Jarvis, NHM. Includes Linnaeus’s bibliography; facsimiles include Gen. Pl., Sp. Pl., Mant., Reg. Veg., Amoen. Acad., Suppl. & editions & versions.
  • The “Geraniaceae” of Robert Sweet, 1820-1830, Index & Discussion. Group leaflet 1998, ISBN 1-899742-18-2, alpha & numeric indexes, 12 pages. Examines Sweet’s colours and reporting.
  • Henry Andrews & Geraniaceae, 1798-1828, Index & Discussion. Ed. 2, Group booklet 2000, ISBN 1-899742-12-3, 32 pages. Examines Andrews’s colours, reporting and dating.

The L’Heritier Project

Charles Louis L’Heritier de Brutelles was possibly the most important early botanist involved with the Geraniaceae and shares with Robert Sweet the title of “father of Pelargonium“.

  • Geraniologia (Icones), by L’Heritier, 1792. Facsimile reprint 1978. Folio book. These are the figures by which L’Heritier meant to establish the “new” genera Pelargonium, Erodium. 40 black and white folio figures of great historic interest. The sole existant text is for Erodium, cf. there.
  • Geraniologia (Erodium), by L’Heritier, 1802, Facsimile text 1988. ISBN 1-899742-21-2. This is the Erodium part of the historic text, which should have accompanied the famous figures L’Heritier published in 1792.
  • Geraniologia: Partial Text Geranium, Pelargonium, Monsonia. Geraniaceae Group Associated Note 56, May 2011. Size A5, 33 pages. Text and comments. Text as sent to Hortus Kewensis, May 1789.
  • Notes on the Geraniologia of L’Heritier, by G. G. Guittonneau, translated 1987, reissued 1995. 2 of 4-pages leaflets. Benchmark papers establishing when the figures or text of Erodium was published.
  • L’Heritier: Geraniologia – Discussion & Index, by R. Clifton, 1995. ISBN 1-899742-18-2. 24-page leaflet. Examines only the figures, updated names.

Species Check-lists (Geraniales Vol. 1)

All A4 size paperback 1-899742-00-X. Edition 5: includes corrections from the professional botanists working on the genus up to 1994, and includes all latinised names for the 5 core genera and Hypseocharis.

  • Part 6, Superseded Genera, 2007, ISBN 1-899742-65-4. Hybrids and genus Grielium described; Sweet’s Pelargonium genera.
  • Part 7, Hypseocharis, 1994, 1-899742-07-7, 8 pages. All species described; including observations made in the field by botanists over the last century.

Books in Languages other than English

What follows is a sample collection of Geraniaceae titles, mostly focussing on hybrids and varieties of horticultural value, though some of the books may have sections that are of interest to species enthusiasts.


  • Bent Nielsen: 100 pelargonier, 2006, ISBN 9788761404480


  • Christa Holm: Kiehtovat pelargonit, WSOY, 1998, ISBN 9789510226599


  • Jean de Jonghe: Traité méthodique de la culture du Pelargonium précédé d’une introduction historique: d’une petite bibliographie spéciale et d’une description des serres propres à cette culture, Hachette Livre, 2017, ISBN 978-2013062480
  • Andreas Riedmiller,‎ György Jankovics: Géraniums, pélargoniums : Les conseils d’un spécialiste pour l’achat, la culture et la multiplication, Hachette Pratique, 2008, ISBN 978-2016210970
  • F. Abergel,‎ Yves Le Floc’h: Pélargoniums, Hachette Vie Pratique, 2001, ISBN 978-2012364486
  • Coen Jansen: Les Geraniums Vivaces pur le jardin, Editions Eugen Ulmer, 1998, ISBN 978-2841380886
  • Christa Hofmann: La beauté des pelargoniums, Editions Eugen Ulmer, 1991, ISBN 978-2841380138
  • Andreas Riedmiller: Géraniums et Pélargoniums : Pour qu’ils donnent le meilleur de leur floraison, Hachette, 1997, ISBN 978-2010180927
  • J. J. A. Van Der Walt,‎ Ellaphie Ward-Hilhorst: Pélargoniums du Sud African, Relié, 1979, ASIN: B073SC4JDD


  • Jakob Ernst von Reider: Beschreibung Aller Bekannten Pelargonien Und Anleitung Zur Erkennung Und Kultur Derselben, Nabu Press, 2011, ISBN 978-1245320870
  • Miriam Wiegele,‎ Eveline Bach: Duftpelargonien auswählen und genießen, Österreichischer Agrarverlag, 2010, ISBN 978-3704023803
  • Marion Nickig,‎ Barbara Pöschel: Pelargonien, Ellert & Richter, 2002, ISBN 978-3831900398
  • John Feltwell: Geranien und Pelargonien – Tipps für eine üppige Blütenpracht, Augustus Verlag, 2002, ISBN 978-3804372177
  • Urs Eggli: Sukkulenten-Lexikon, Bd.2, Zweikeimblättrige Pflanzen (Dicotyledonen) ausgenommen Aizoaceae, Asclepiadaceae, Cactaceae und Crassulaceae, Eugen Ulmer, 2002, ISBN 978-3800139156
  • Miriam Wiegele: Duftpelargonien, Ulmer, 2000, ISBN 3-8001-3133-1
  • Wilhelm Elsner und Heinrich Loeser, Winfried Biermann: Gärtner-Handbuch Pelargonien, Haymarket Media, 1995, ISBN 978-3878150671
  • Christa Hofmann: Schöne Pelargonien (Geranien), Eugen Ulmer, 1992, ISBN 978-3800165087
  • Andreas Riedmiller: Geranien /Pelargonien. So blühen sie am schönsten. Experten-Rat für Kauf, Pflege und Vermehrung, Gräfe und Unzer, 1988, ISBN 978-3774246546
  • Wolfgang Horn, Richard Maatsch,‎ Karl-Heinz Weise,‎ Hans Ganslmeier: Pelargonien. Geschichte, Kultur, Wirtschaftlichkeit und Züchtung Broschiert, 1985, ISBN 978-3489723226
  • J.J.A. van der Walt:  Pelargonien des südlichen Afrika, Band I, Pelargonien Fischer, 1979, ISBN 3-922332-01-3
  • Stefan Vogel: Blütenbiologische Typen als Elemente der Sippengliederung, Fischer, 1954, ASIN: B0000BOZHA
  • R. Knuth: Geraniaceae: Mit 427 Einzelbildern in 80 Figuren, 1912 (Reprint, in Latin), Forgotten Books, 2017, ISBN 978-0243512010


  • M. Luisa Sotti: Gerani rustici, Edagricole-New Business Media, 2010, ISBN 978-8820642990
  • Adriana Vitali: Gerani, Edagricole-New Business Media, 2000, ISBN 978-8820661052
  • Andrea Riedmiller,‎ S. Crespi,‎ A. Orlandi: Gerani pelargoni, Crespi, 1999, ISBN 978-8887257014
  • Mia Esser: Gerani Pelargonium. Il colorato mondo dei gerani: le varietà, la cura, dove e come piantarli, Idea Libri, I edizione, 1999, ASIN: B01FSHPBOE
  • David Clark,‎ G. Barnabè Bosisio: I gerani, Zanichelli, 1991, ISBN 978-8808078469


  • Elzbieta Kozlowska: Pelargonie. Na balkony, tarasy, do ogrodu, Ateneum, 2014, ISBN 978-8377732236


  • Daniela Beretta: Los Geranios, De Vecchi, 2007, ISBN 978-8431536169
  • Pat Weaver: Geranios, La Isla, 1990, ISBN 978-8487535512
  • Rina Lameri Ortolina: Los Geranios, De Vecchi, 1976, ISBN 978-8431551667


  • Eva Tingström: Vilda pelargoner i kruka (Digital Book).
  • Veronica Wägner: Passion för pelargon : en samlares möten, Bonnier Fakta, 2010, ISBN 9789174241099
  • Veronica Wägner: Älskade pelargoner, Bonnier Fakta, 2010, ISBN 9789174241105
  • Susanna Rosén: Stora pelargonboken, Prisma, 2008, ISBN 9789151849362
  • Susanna Rosén: 100 pelargoner och hur du sköter dem från frö eller stickling, Bokförlaget Semic, 2008, ISBN 9789155233075
  • Lena Ljungquist,‎ Eva Tingström: Pelargoner, Ica Bokförlag, 2008, ISBN 978-9153427643
  • Veronica Wägner: Älskade pelargoner : En samlares anteckningar, Wahlström & Widstrand, 2007, ISBN 9789146216025
  • Karin Martinsson: Pelargoner – Kulturarv i Kruka, 2002, ISBN 978-9151840277
  • Christa Holm: Pelargoner, Natur och Kultur, 1997, ISBN 9789127064379