[Wikipedia] Reproductive Habits, Crushed Leaf Odor, Taxonomy: It has unusual reproductive habits. It grows plantlets from the petiole near the base of each leaf. The plantlets drop off, fall in the soil, and take root there.[5] It will also reproduce by rhizomes and by seeds.
Crushing the leaves of this plant releases a strong cucumber-like odour. (2E,6Z)-2,6-nonadienal was identified as the source of this odor. In nature, banana slugs, Ariolimax columbianus, are selective in their diet and were not observed to feed on this plant. In a feeding experiment, the slugs rejected lettuce leaves that had been treated with (2E,6Z)-2,6-nonadienal. [6]
Taxonomy
The genus was named after the Scottish-Canadian botanist William Fraser Tolmie, while the species name refers to Archibald Menzies, the Scottish naturalist for the Vancouver Expedition (1791 to 1795).
The plant was formerly considered to be the only member of a monotypic genus until diploid populations (due to autopolyploidy) were split off as a separate species T. diplomenziesii from the tetraploid populations.[7][8]
Cultivation
Tolmiea menziesii is commonly cultivated as an ornamental plant, for use as a house plant or planted as a groundcover in gardens.[9] It requires moisture and does not tolerate much sun or dryness. (link added by Mary Ann Machi)