Samaneh Mosaferi - MSc Student / Biology Depatment, Faculty of Science, Alzahra University, Vanak, Tehran, Iran
Maryam Keshavarzi - Assistant Professor / Biology Depatment, Faculty of Science, Alzahra University, Vanak, Tehran, Iran
Tayebeh Amini - Membership of scientific board / Botanical Garden of Nowshahr, Nowshahr, Iran

Persicaria lapathifolia subsp. nodosa is recorded for the first time for the flora of Iran. Morphological variation of this taxon in Iran has been studied. This subspecies differs from P. lapathifolia subsp. lapathifolia by having densely glandular peduncles and leaves with golden glands beneath. The most characteristic features of this subspecies are presence of red spots on the stem and having smaller and lax spikes.

Persicaria lapathifolia subsp. nodosa, Polygonaceae, Flora, Taxonomy, Iran