Aristolochia rotunda   L.

trivial name

size

habit

inflorescence

exposure

temperature range

humidity

water requirements

soil pH

propagation

difficulty

Round-leafed Birthwort

approx. 20-90 cm

perennial, tuberous, suberect herb

brownish-purple with lighter ornamentations

part shade

20-40 °C in summer, hardy to -12 °C

> 50 %

moderately humid all year round

acidic

seeds (stratification period up to 2 years)

2 (1 = very easy, 5 = extremely difficult)


Aristolochia rotunda probably represents the most widespread Aristolochia in Europe aside A. clematitis.

 

Surprisingly A. rotunda shows quite recognizable differences concerning populations across its habitat.

On the Tyrrhenian Islands the subspecies A. rotunda subsp. insularis needs to be mentioned and another one, A. rotunda subsp. reichsteinii, from the island of Pag/Croatia.

It is yet unclear how significantly the differences of vegetative and underground parts justify the taxonomic status as many intermediate forms e.g. from Sicily and Greek islands are known.