Until 2024, the only known specimen of B. agavifolia growing in the UK could be found in the Plant Heritage National Collection at National Trust for Scotland Greenbank Garden in Glasgow. The morphology of the plant cultivated there matches the taxonomic description of B. x spathulata by Peter F. Yeo in his 1966 revision of the genus. However, B. agavifolia is still available in trade and was introduced to the UK from the French nursery, Atelier du Vegetal, in spring 2024. This plant, however, does not match the description by Yeo. It has rounded, glabrous foliage with a ciliate (roughly hairy) margin. It is likely this is a form of B. pacumbis that has been incorrectly named as B. agavifolia. It is important to note that B. x spathulata is believed to be a hybrid of B. ciliata and B. stracheyi (the largest and smallest leaved species). But, as highlighted by Yeo, the absence of hairs on the lamina indicates it is more likely that B. pacumbis (formerly B. ciliata forma ligulata) is one of the parents. Therefore, the French plant may be a more rounded form of the hybrid either from wild or garden origin.