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Laboratory of Plant Systematics

 

Alexander Vrijdaghs - Publications

2011

• Larridon, I., Reynders, M., Huygh, W., Bauters, K.,Vrijdaghs, A., Leroux, O., Muasya, M.A., Simpson, D.A. & P. Goetghebeur. (2011). Taxonomic changes in C3 Cyperus (Cyperaceae) supported by molecular data, morphology, embryology, ontogeny and anatomy. Plant Ecology and Evolution 107, 3: 327-356, 18 figs.

• Flores Olvera, H., Vrijdaghs, A., Ochoterena, H. & E. Smets. (2011). The need to re-investigate the nature of homoplastic characters: an ontogenetic case study of the ‘bracteoles’ in Atripliceae (Chenopodiaceae). Annals of Botany 108, 5: 847-865, 21 figs.

• Vrijdaghs, A., Reynders, M., Muasya, A.M., Larridon, I., Goetghebeur, P. & E. Smets. (2011). Morphology and development of spikelets and flowers in Cyperus and Pycreus (Cyperaceae). Plant Ecology and Evolution 144, 1: 44-63, 13 figs.

2010

• Muasya, A.M., Musili, P.M. & A. Vrijdaghs. (2010). Kyllinga mbitheana (Cyperaceae) - Description, floral ontogeny and pollen micromorphology of a new species from Kenya. Journal of East African Natural History 99, 1: 65–75, 5 figs.

• Samain, M.S. Vrijdaghs, A., Hesse, M., Goetghebeur, P., Jiménez Rodriguez, F., Stoll, A., Neinhuis, C. & S. Wanke. (2010). Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development. Annals of Botany 105, 5: 677-688, 14 figs.

• Vrijdaghs, A., Reynders, M., Larridon, I., Muasya, A.M., Smets, E. and P. Goetghebeur. (2010). Spikelet structure and development in Cyperoideae (Cyperaceae): a monopodial general model based on ontogenetic evidence. Annals of Botany 105, 4: 555-571, 21 figs.

2009

• Muasya, A.M., Vrijdaghs, A., Simpson, D.A., Chase, M.W., Goetghebeur, P. & E. Smets. (2009). What is a genus in Cypereae: phylogeny, character homology assessment and generic circumscription in Cypereae. The Botanical Review 75, 1: 52-66, 1 fig.

• Vrijdaghs, A., Muasya, A.M., Goetghebeur, P., Caris, P., Nagels, A. & E. Smets. (2009). A floral ontogenetic approach to questions of homology within the Cyperoideae (Cyperaceae). The Botanical Review 75, 1: 30-51, 8 figs.

• Nagels, A., Muasya, A.M., Huysmans, S., Vrijdaghs, A., Smets, E; & S. Vinckier. (2009). Palynological diversity and major evolutionary trends in Cyperaceae. Plant Systematics and Evolution 277, 1/2: 117-142, 5 figs.

2008

• Flores Olvera, H., Smets, E. & A. Vrijdaghs. (2008). Floral and inflorescence morphology and ontogeny in Beta vulgaris, with special emphasis on the ovary position. Annals of Botany 102: 643-651, 7 figs. (pdf)

2007

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2007). The Schoenus spikelet: a rhipidium? A floral ontogenetic answer. Aliso 23, 2: 204-209, 4 figs. (pdf)

• Leroux, O., Knox, P., Leroux, F., Vrijdaghs, A., Bellefroid, E., Borgonie, G. & R. Viane. (2007). Intercellular Pectic Protuberancesin Asplenium: New Data on their Composition and Origin. Annals of Botany 100, 6: 1165-1173.

• Groeninckx, I., Vrijdaghs, A., Huysmans, S., Smets, E. & S. Dessein. (2007). Floral ontogeny of the Afro-Madagascan genus Mitrasacmopsis with comments on the development of superior ovaries in Rubiaceae. Annals of Botany 100, 1: 41-49, 5 figs. (pdf)

2006

• Vaes, E., Vrijdaghs, A., Smets, E. & S. Dessein. (2006). Elaborate petals in Australian Spermacoce (Rubiaceae)species: morphology, ontogeny and function. Annals of Botany 98, 6: 1167-1178, 10 figs. (pdf)

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & A.M. Muasya. (2006). The floral scales in Hellmuthia (Cyperaceae, Cyperoideae) and Paramapania (Cyperaceae, Mapanioideae): an ontogenetic study. Annals of Botany 98, 3: 619-630, 8 figs. (pdf)

2005

• Vrijdaghs, A., Goetghebeur, P., Muasya, A.M., Caris, P. & E. Smets. (2005). Floral ontogeny in Ficinia and Isolepis (Cyperaceae), with focus on the nature and origin of the gynophore. Annals of Botany 96: 1247-1264, 15 figs. (pdf)

• Vrijdaghs, A., Caris, P., Goetghebeur, P. & E. Smets. (2005). Floral ontogeny in Scirpus, Eriophorum and Dulichium (Cyperaceae), with special reference to the perianth. Annals of Botany 95, 7: 1199-1209, 7 figs. (pdf)

2004

• Vrijdaghs, A., Goetghebeur, P., Muasya, A.M., Smets, E. & P. Caris. (2004). The nature of the perianth in Fuirena (Cyperaceae). South African Journal of Botany 70, 4: 587-594, 4 figs. (pdf)

ABSTRACTS

2011

• Vrijdaghs, A., Reynders, M., Larridon, I., Muthama Muasya, A., Smets, E. & P. Goetghebeur. (2011). Metatopic displacements as an explanation for deriving morphologies in spikelets of Cyperoideae, Cyperaceae. In: Borsch, T., Giere, P., Hoffmann, J., Jahn, R., Löhne, C., Nordt, B. & M. Ohl (eds.), BioSystematics Berlin, 21 – 27 February 2011, Programme and Abstracts: 379-380. Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Germany. 434 p. ISBN 978 3 921800 68 3

• Groeninckx, I., Vrijdaghs, A. & E. Smets. (2011). Development of corolla tubes and corolla slits in the subfamily Rubioideae (Rubiaceae). In: Borsch, T., Giere, P., Hoffmann, J., Jahn, R., Löhne, C., Nordt, B. & M. Ohl (eds.), BioSystematics Berlin, 21 – 27 February 2011, Programme and Abstracts: 147-148. Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Germany. 434 p. ISBN 978 3 921800 68 3

2010

• Flores Olvera, H., Vrijdaghs, A., Ochoterena, H. & E. Smets. (2010). Hipótesis de homologie morfológica: reinterpretación ontogenética de la morfologia floral en el linaje Chenopodiaceae. In: X Congreso Latinoamericano de Botánica. Conservación y uso sustentable de la flora nativa latinoamericana. 4-10 Octobre de 2010, La Serena, Chile.

• Groeninckx, I., Vrijdaghs, A. & E. Smets. (2010). Corolla slits in the subfamily Rubioideae. In: The Fifth International Rubiaceae and Gentianales Conference. Biodiversity in the light of historical information. 6-10 September 2010, Stockholm, Sweden. Programme, Abstracts & Participants: 33. The Royal Swedish Academy of Sciences and Stockholm University. 73 p.

• Reynders, M., Vrijdaghs, A., Larridon, I., Huygh, W., Leroux, O., Muasya, A.M. & P. Goetghebeur. (2010). The Cypereae radiation: Pycreus highlighted (Cyperaceae). In: Jeannoda, V.H., Razafimandimbison, S.G., & P. De Block. (eds.) XIXIth AETFAT Congress Madagascar, 25-30 April 2010. Abstracts: 445. Scripta Botanica Belgica 46. National Botanic Garden of Belgium, Meise. 510 p.

• Larridon, I., Huygh, W., Reynders, M., Vrijdaghs, A., Leroux, O., Boeckx, P., Muasya, A.M., Simpson, D.A. & P. Goetghebeur. (2010). The Cyperus clade (Cyperaceae). In: Jeannoda, V.H., Razafimandimbison, S.G., & P. De Block. (eds.) XIXIth AETFAT Congress Madagascar, 25-30 April 2010. Abstracts: 261. Scripta Botanica Belgica 46. National Botanic Garden of Belgium, Meise. 510 p.

2009

• Vrijdaghs, A., Janssens, S., Caris, P. & E. Smets. (2009). Towards the understanding of the floral ontogeny of Hydrocera. In: Systematics 2009. 1st meeting of BioSyst EU. Program and Abstract: 136. National Herbarium of the Netherlands, Leiden branch and National Museum of Natural History Naturalis. 142 p.
• Vrijdaghs, A. & E. Smets. (2009). The homology concept and floral ontogeny. In: Systematics 2009. 1st meeting of BioSyst EU. Program and Abstract: 135. National Herbarium of the Netherlands, Leiden branch and National Museum of Natural History Naturalis. 142 p.

 

2008

• De Block, P. & A. Vrijdaghs. (2008). Ontogeny of inflorescences, flowers and fruits of Canephora madagascariensis (Octotropidae). In: Ochoterena, H., Terrazas, T., De Block, P. & S. Dessein (eds.) IV International Rubiaceae (Gentianales) Conference. Programme & Abstracts: 27. Scripta Botanica Belgica 44. National Botanic Garden (Belgium), Meise. 88 p.

• Vrijdaghs, A., Smets, E. & P. Goetghebeur. (2008). Spikelet ontogeny and structure in Cyperaceae (subfamily Cyeproideae). In: Monocots IV, August 11-15, 2008, Abstracts: 66. University of Copenhagen, Denmark. 100 p.

• Reynders, M., Muasya, A.M., Larridon, I., Dludlu, M.N., Huygh, W., Vrijdaghs, A., Simpson, D.A. & P. Goetghebeur. (2008). Cypereae revisited – evidence from mprphology and DNA data. In: Monocots IV, August 11-15, 2008, Abstracts: 51. University of Copenhagen, Denmark. 100 p.

• Huygh, W., Reynders, M., Larridon, I., Muasya, A.M., Vrijdaghs, A., Simpson, D.A. & P. Goetghebeur. (2008). Kyllinga, Cyperaceae’s worst nightmare? In: Monocots IV, August 11-15, 2008, Abstracts: 31. University of Copenhagen, Denmark. 100 p.

• Nagels, A., Muasya, A.M., Huysmans, S., Vrijdaghs, A., Smets, E; & S. Vinckier. (2008). Pollen diversity in Cyperaceae. In: SAAB Annual Meeting Abstracts, South African Journal of Botany 74, 2: 374.

2007

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & A. M. Muasya. (2007). An ontogenetic study of the lateral floral scales in Hellmuthia (Cyperaceae, Cyperoideae) and Paramapania (Cyperaceae, Mapanioideae). In: Abstracts of the Young Botanists Day 2006 “Tropical botany in the Benelux”, Belgian Journal of Botany 140, 2: 260-261.

• Nagels, A., Muasya, A., Huysmans, S., Vrijdaghs, A., Smets, E. & S. Vinckier. (2007). Palynological variation in Cyperaceae – a search for informative pollen and orbicule characters. In: Systematics – The Sixth Biennial Conference of the Systematics Association, 28-31 August 2007. Celebrating the tercentenary of the birth of Carl Linnaeus: 62. Royal Botanic Garden Edinburgh. 80 p.

• Huygh, W., Reynders, M., Muasya, M. Vrijdaghs, A. & P. Goetghebeur. (2007). Origin and evolution of the Cyperaceae with laterally compressed pistils. In: XVIIIth AETFAT Congress, 26 February – 2 March 2007. Abstracts: 33. Yaoundé, Cameroon. 197 p.

2006

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & A. M. Muasya. (2006). An ontogenetic study of the lateral floral scales in Hellmuthia (Cyperaceae, Cyperoideae) and Paramapania (Cyperaceae, Mapanioideae). In: Young Botanists’ Day, 24 November 2006: 16. Leuven. 16 p.

• Vrijdaghs, A., Muasya, A.M., Goetghebeur, P. & E. Smets. (2006). The nature of the spikelet in non-Mapanioid Cyperaceae. In: 17th International Symposium Biodiversity and Evolutionary Biology of the German Botanical Society, 24-28 September 2006: 223. Bonn. 266 p.

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & A. M. Muasya. (2006). An ontogenetic study of the lateral floral scales in Hellmuthia (Cyperaceae, Cyperoideae) and Paramapania (Cyperaceae, Mapanioideae). In: Botany 2006. Looking to the future – Conserving the past, July 29-August 2, 2006. Scientific Meeting Abstracts 667: 302. Chico, California. 394 p.

2005

• Vrijdaghs, A., Goetghebeur, P. & E. Smets. (2005). Homology problems in cyperoid flowers: a floral ontogenetic approach. In: XVII International Botanical Congress, Abstracts: 13.7.6., p. 219. Vienna. 728 p.

• Dessein, S., Vaes, E., Vrijdaghs, A. & E. Smets. (2005). Floral diversification in Spermacoce (Rubiaceae): evolutionary steps towards more efficient cross-pollination. In: XVII International Botanical Congress, Abstracts: 12.3.4., p. 196. Vienna. 728 p.

2004

• Vrijdaghs, A., Caris, P. Goetghebeur, P. & E. Smets. (2004). The bristles of Dulichium (Cyperaceae), a floral ontogenetic study. In: Botany 2004 - Alpine diversity: adapted to the peaks, July 31-August 5, 2004. Scientific Meeting Abstracts 643: 164. Snowbird, Utah. 181 p.

• Muasya, A.M., Simpson, D.A., Chase, M.W., Goetghebeur, P., Smets, E., Vrijdaghs, A. & T. Verboom. (2004). Ficinia and allies, a clade of the Cyperaceae with high diversity in the Cape Floristic Region. In: Recent floristic radiations in the Cape flora, 3-5 July 2004: 34-35. Institute of Systematic Botany & Botanical Garden, University of Zürich, Switzerland. 73 p.

2003

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2003). The Schoenus L. spikelet a rhipidium? A floral ontogenetic approach. In: Bayer, C., Dressler, S., Schneider, J. & G. Zizka (eds.) 16th International Symposium Biodiversity and Evolutionary Biology, 17th International Senckenberg Conference, 21-27 September 2003. Abstracts: 243. Palmarum Hortus Francofurtensis 7. Frankfurt am Main. 264 p.

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2003). The orientation of the developing gynoecium of Cladium mariscus  (L.) Pohl. In: Bayer, C., Dressler, S., Schneider, J. & G. Zizka (eds.) 16th International Symposium Biodiversity and Evolutionary Biology, 17th International Senckenberg Conference, 21-27 September 2003. Abstracts: 242. Palmarum Hortus Francofurtensis 7. Frankfurt am Main. 264 p.

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2003). The nature of the perianth of Fuirena (L.) Roxb. (Cyperaceae). In: Bayer, C., Dressler, S., Schneider, J. & G. Zizka (eds.) 16th International Symposium Biodiversity and Evolutionary Biology, 17th International Senckenberg Conference, 21-27 September 2003. Abstracts: 241. Palmarum Hortus Francofurtensis 7. Frankfurt am Main. 264 p.

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2003). Is the Schoenus spikelet a rhipidium ? A floral ontogenetic answer. In: Monocots III. Abstracts of the Third International Conference on the comparative biology of the Monocotyledons and the Fourth International Symposium on Grass systematics and evolution, 31-3 – 4-4-2003: 94. Rancho Santa Ana Botanic Garden, Claremont, California. 100 p.

2002

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2002). Floral ontogeny of Cyperaceae. In: Journée des Jeunes Botanistes / Dag van de Jonge Botanisten / Young Botanists Day - 8-11-2002: 6. Koninklijke Belgische Botanische Vereniging. Nationale Plantentuin van België.

• Vrijdaghs, A., Goetghebeur, P., Smets, E. & P. Caris. (2002). Floral ontogeny of Cyperaceae. In: Sedges 2002, International Conference on Uses, Diversity, and Systematics of Cyperaceae, 6-8 June 2002. Delaware State University, U.S.A.

2001

• Caris, P., Vrijdaghs, A. & E. Smets. (2001). Floral ontogenetic studies in the former Ebenales. In: 15. Internationales Symposium Biodiversität und Evolutionsbiologie. Tagungsprogramm, Zusammenfassungen der Vorträge und Poster & Teilnehmerverzeichnis, Bochum 23-28 September 2001: 87. Lehrstuhl für Spezielle Botanik, Ruhr-Universität Bochum. 215 p.