And I had little difficulty in determining the objects with which it was necessary to commence, for I was already persuaded that it must be with the simplest and easiest to know, and, considering that of all those who have hitherto sought truth in the Sciences, the mathematicians alone have been able to find any demonstrations, that is, any certain and evident reasons, I did not doubt but that such must have been the rule of their investigations.
Clematis lasiantha (Wikipedia) Clematis lasiantha, the pipestem clematis, is a creamy-white flowering liana vine, belonging to subgenus Clematis of the large genus Clematis.
Clematis seed pod in the backyard