Rumex tuberosus subsp. tuberosus Linnaeus, 1762
Common names: Tuberous dock [En], Oseille tubéreuse, Patience tubéreuse [Fr], Λάπαθον το κονδυλόρριζον [Gr], Kuzukıkırdağı [Tu]
Moni Ypsilou, LESVOS ● Greece
Description: Perennial plant, with at least some of the roots tuberous.
The stems are arcuate-ascending to erect, 10-60 cm hight.
The lower leaves are sagittate, acute or obtuse; the stem leaves sagittate, usually acute.
The inner perianth segments are ± cordate-orbicular, 3-8 mm in diameter, much larger than the nut, tuberculate with small, backwardly directed tubercles. The outer perianth segments are reflexed in fruit.
Its is a polymorphic species in which a number of subspecies are recognised including:
• R. t. subsp. creticus – Stems numerous, short, ascending; basal leaves very obtuse
• R. t. subsp. contractus – Stems usually single, tall, erect; basal leaves usually acute, inflorescence contracted; inner perianth segments c. 8 mm broad.
• R. t. subsp. tuberosus – Stems usually single, tall, erect; basal leaves usually acute; inflorescence not contracted; inner perianth segments 3-5 mm broad; inflorescence branches curving erect, themselves unbranched.
• R. t. subsp. horizontalis – Stems usually single, tall, erect; basal leaves usually acute; inflorescence not contracted; inner perianth segments 3-5 mm broad, inflorescence branches straight, spreading, themselves branched.
Biology: Flowering from April to July.
Habitat: stony places, road sides.
Distribution: South and Centre Europe, North Western Africa, Cyprus, South Russia, Caucasia, Syrian Desert, Iran and Turkestan.
Türkiye Bitkileri, Plants of Turkey, Rumex tuberus