Table of Contents

A short description of the organization and development of Iter Mediterraneum V in Morocco is made, with indication of participants and institutions where the 2366 gatherings of vascular plants, the 314 of Bryophytes and the 195 of Lichens collected are deposited. The scientific papers resulting from the study of the plant material collected, which are the components of this volume 26 of Bocconea are listed. Other scientific papers published so far with the use of plant material collected during this expedition were known are indicated.

The vascular plants material collected during Iter Mediterraneum V of OPTIMA in Morocco has been studied. It comprises 2366 gatherings collected from 65 localities mainly in the Rif Mountains (28 localities) and the Middle Atlas (21 localities) plus 16 localities in the High Atlas, the “plaines et plateaux du Maroc oriental” and “Maroc atlantique nord”. The checklist includes 1416 species and subspecies which belong to 112 families. One species is new for the flora of Morocco (Epilolium lanceolatum Sebast. & Mauri), 18 are new records for the Middle Atlas, seven for central Middle Atlas, one for Jbel Tazekka, nine for the “plaines et plateaux du Maroc oriental”, three for “base Moulouya”, four for “Maroc atlantique nord”, three for High Atlas, and three for the Rif Mountains. The following new combinations are proposed: Astragalus incanus subsp. fontianus (Maire) Valdés, Malva lusitanica var. hispanica (R. Fern.) Valdés, Nepa boivinii var. tazensis (Braun-Blanq. & Maire) Valdés, Ornithogalum baeticum subsp. algeriense (Jord. & Fourr.) Valdés and Ornithogalum baeticum subsp. atlanticum (Moret) Valdés.

Of the 65 sites visited during “Iter Mediterraneum V” in Morocco, 47 are located in 13 of the 20 natural areas, which for chorological purposes, have been recognized in N Morocco. A total of 1689 gatherings was collected in these 13 areas. Study thereof resulted in the incorporation of four new taxa for the catalogue of N Morocco: Adenocarpus complicatus subsp. nainii (Maire) P. Gibbs, Erodium stellatum Delile, Lotus weilleri Maire and Schedonorus mairei (St.-Yves) Dobignard. Several taxa constitute new records for one or more of the 13 areas visited. The percentage of new records varies from 0,3 % in W Rif, the best known natural area of N Morocco, to 38 % (24 new records out of 63 taxa collected) in Tsoul, which is the least known natural area of N Morocco, followed by Ouezzane, with 28 new records out of 153 taxa collected (18,3 %).

The Lichens collected by S.L. Jury and R. Wilson during Iter Mediterraneum V are listed, together with the indication of the institutions where the material is deposited.

They represent 111 taxa belonging to 79 genera of 25 families. Twelve taxa have not previously been studied. In seven taxa the chromosome number found differs from previous reports.

Part of the bryophytes collected during Iter Mediterraneum V are listed. Politrichum piliferum, new to Morocco and 6 others taxa no longer reported since 1962 for this country are recorded.