Myriophyllum quitense Kunth (Haloragaceae) in Bolivia: A terrestrial growth-form with bisexual flowers

A terrestrial growth-form of Myriophyllum quitense growing in a lake bed in the interandean valley region of Bolivia represents the first report of a terrestrial growth-form for this species. While typically M. quitense possesses leaves and flowers in whorls of (3–) 4, this population is noteworthy for possessing 2–5% of individuals with both leaves and flowers in whorls of five, and for the presence of bisexual flowers. Observations regarding the distribution, habitat preferences and intraspecific variation of M. quitense in Bolivia are also given.