What cultivar of Japanese Holly is known as Ilex crenata 'Convexa'?

Ilex crenata 'Convexa' is recognized as the Box Leaf Japanese Holly. This cultivar is notable for its dense, rounded growth habit and small, boxy leaf shape, which is a distinguishing feature that contributes to its popularity in landscape design. The leaves of 'Convexa' are typically glossy and dark green, enhancing its aesthetic appeal in gardens and narrow spaces.

This cultivar is often chosen for its versatility as a low hedge or foundation planting, thriving in a variety of soil types, and tolerating pruning well, which further supports its functional use in ornamental horticulture. The other options refer to different types of hollies, such as English Holly and Common Holly, which do not have the same characteristics or classification as Ilex crenata, making them irrelevant in this context.