The hairs in species of Plantago L. section Palaeopsyllium PlLG. (Plantaginaceae)

The hairs of three representatives of the section Palaeopsyllium Pilg.: Plantago palmata Hook.f., P. cornuti Gouan and P. eriopoda Torr. were studied. The above mentioned taxa contained headed hairs (a unicellular stalk and a vertically divided into two cells) and multicellular headless hairs (web‐like) typical of the representatives of the family Plantaginaceae. Taxa of the section Palaeopsyllium have similar types of hairs as the sections: Polyneuron Decne., Micropsyllium Decne., Holopsyllium Pilg., Lamprosantha Decne., Oliganthos Barn., Mesembrynia Decne. and Eremopsyllium Pilg., which may be evidence of affinity of these taxa.