Magazine.
8 favorite votes.
Magazine.1928 missing
Article (magazine) published 2001.The author divides the species P. delavayi Franch. into two varieties and several forms.
Website/Catalog published 1989.
Magazine published 1920 by Doubleday & Company.
Article (magazine) published 2006.The authors re-establish <i>P. corsica</i> Sieber ex Tausch as a separate species distinct from <i>P. mascula</i>, following research in the Mediterenean Islands, Italy and Greece.
7 favorite votes.