(last page)Listera, kaksikot

This genus is mainly circumpolear, but L. ovata can be commoly found further south. Both of the Finnish species are comon at least in parts of Finland. 

They both have creeping rhizome. Sometimes new plants form from the tips of the roots, and these plants can be found from a distance from the mother-plant. L. ovata usually grows in clumbs, but L. cordata is more loose. 

These plants pollinate with small bugs, excpecially, L. cordata mainly gets pollinated by them. L. ovata is not that specified, it has lot of different insects which suite for pullination. The plants produce lot of seeds, it is not unusual that all flowers will form seed. The plants wither early and flower-stems will never stay up over winter. Te flower last for a long time, they don´t always even wither before leaves! The special effect in flowers is that in young plant the lip is close to the stem, and when the flower is pullinated, the lip "stands up". The insects which climp to the flower downward only climp to flowers which are not pollinated and leave other flowers alone. The lip guides them to get on right flowers. The flowers have lot of nectar. The nectar is on the lip, not in a spur, and that is propably the reason why the flowers have many insects which don´t wisit in usual flowers (in L. ovata) such as flies. 

1: ovata - soikkokaksikko 
2: cordata - herttakaksikko 

 These pages has been made and updated by Matti Niissalo, sophronitis@yahoo.com