Potentilla, L. SECT. AUREAE

Faghir, Marzieh Beygom, Sadeghi, Samira & Attar, Farideh, 2021, A new species of the genus Potentilla L. (Rosaceae) from the Tehran province (Iran), Adansonia (3) 43 (9), pp. 99-106 : 105

IDENTIFICATION KEY FOR POTENTILLA L. SECT. AUREAE (RYDB.) JUZ. IN IRAN

1. Radical leaves 3-foliolate; petals twice larger than sepals .................................................. P. gelida C. A. Mey.

— Radical leaves 3 and 5-7 foliolate; petals not twice larger than sepals ........................................................... 2

2. Radical leaves leaflets deeply toothed, flabellate in shape, with 3-7 oblong-elliptical teeth and glabrous on the upper side ....................................................................................................................... P. geranioides Willd.

— Radical leaves leaflets ± shallowly toothed, not flabellate, 3-6 teeth, oblong to ovate and suborbicular in shape; hairy on both sides ................................................................................... P. crantzii (Crantz) Beck ex Fritsch

— Basal leaves and dead stipules polystichous, hairs subappressed .................................................................... 3

3. Flowering stem erect-ascending, covered with long crispate, flexuose hairs, radical leaves 3-5 foliolate, obovateoblong cuneate, with 5 pairs of oblong acute, obliquely forward pointing teeth, petiole of radical with long crispate, flexuose hairs; petals 8-10 mm ................................................. P. alborzensis Faghir & Attar , sp. nov.

— Flowering stem prostrate, having long and short straight hairs; radical leaves 5 -7 foliolate, narrowly obovate, with 3-6 pairs of obovate, suborbicular directly forward pointing teeth, with long and short straight hairs; petals 10-20 mm ................................................................................................ P. adenophylla Boiss. & Hohenack.