barclayana

Updated: May 25, 2025

If a stick stands in the way, it is to a certain extent clasped; but, as far as I have been able to observe, this clasping movement is independent of the stimulus from contact. Maurandia Barclayana. A thin, slightly bowed shoot made two revolutions, following the sun, each in 3 hrs. 17 min.; on the previous day this same shoot revolved in an opposite direction.

Charles Darwin - The Movements and Habits of Climbing Plants