Acknowledgements

This "assembling" of exsiccata and this collection of pictures would never have been possible without the participation of multiple participants, met at conferences or meetings in Algeria, Morocco, Tunisia, France, Portugal, field trips with teachers of various Algerian Universities and students, including PhD students, with friends, passionate for nature, etc. It was often an occasion of very friendly moments. The flora, such as wildlife, and ecosystems (landscapes!) have an attractive aspect, which often escapes our contemporaries.

Also, to say flora, is to evoke a multitude of faces.

I would mention among them some collectors, often the "discoverers" and those who allowed me to identify many species. Among the first, many Algerian friends or expatriates, academic or otherwise, of which it is difficult to mention all the names (they will know!)

• Fouzi (a forgotten orchid)
• Jamila and Moncef (Eastern Alder carrs)
• Sihem and Malik (Ferns Eastern)
• Marcel and Armand (Tamanrasset Flora)
• Yassin (Jebel Chélia)
• Mary, Tahar and Aïssa (many trips to the East)
• Lamia Azzi (University of El Tarf)
• Azzedine, Jean-Louis, Thierry, Amilton (Oran region)
• Tarek (Jebel Edough) and Rachid (lichenologist)
• Boudjema (University of Annaba: number of Saharan species)
• Errol Vela, of course and many others, including many students

Among the latter:

• A. Donadieu, J.J. Corre and J. Wild (USTL of Montpellier)
• Ozenda P. (University of Grenoble)
• J.M. Montserrat (Spain)
• Dobignard A. (editor with C. Chatelain of synonymic index of the Flora of North Africa)
• J. M. Tison (including Gagea ...)
• Guittonneau G. G. (University of Orléans: Medicago and Erodium)
• Dobignard A. (editor with C. Chatelain of synonymic index of the Flora of North Africa)
• Andreas C. (University of Milan)
• A. Beloued (INA El Harrach)
• D. Sarri (University of M'Sila)
• Chefrour A. (University of Souk Ahras)
• Khellaf R. (University of M'Sila, including orchids)
• Number of colleagues at the University of Annaba: Slim, Amrane, Rachid, Bouzid ...
• Colleagues of ENSA (former INA) El Harrach, who welcomed my herbarium under the aegis of S. Benhouhou.
• E. Vela (with a minimum of 155 species identified or confirmed), S. Muller, in particular wetlands specialist, including the Cyperaceae, and I. Soulié-Marsche, who has insured the determination of Characeae. All 3 of them are members of the Universities of Montpellier.
• Special mention must be made at the CNRS team - University Lyon 1. The majority of our publications borrowed its methods of analysis to the program library ADE-4, under the direction of D. Chessel, J. Thioulouse and J.M. Olivier .
• and of course, all the many colleagues from Northern Africa-tb Forum, with which exchanges are valuable.

This work finally is largely dependent on meetings, contacts and exchanges provided by four workshops organized and funded by the International Union for Conservation of Nature (I.U.C.N.) which were held in:

• Rabat (6 to 9 February 2007): IUCN Red List Training workshop (Freshwater species: fauna and flora)
• Porto (15 to 19 October 2009): Integration of freshwater biodiversity in the development process throughout Africa: Mobilising Information and demonstrations website
• Tabarka (8 to 13 February 2009) Workshop - North Africa Freshwater Biodiversity - Red List
• Rabat (29 March to 1 April 2016) Workshop Red List of monocots Mediterranean monocots - North Africa