Use "umbonate" in a sentence

1. The one in the lower right is Campanulate or umbonate

2. Convex to obtusely Campanulate with an incurved margin at first, rarely becoming plane, and often are umbonate or with a slight depression in the center.

3. ‘The one in the lower right is Campanulate or umbonate.’ ‘The species grows as a partially herbaceous deciduous vine, with fairly pale green, somewhat cut foliage and Campanulate light rose-purple flowers.’ ‘The Campanulate flowers have four to six tepals.’