Caladium is represented by which scientific name?

Caladium is indeed represented by the scientific name Caladium x hortulanum. This name signifies a hybrid species that is commonly cultivated for its ornamental foliage, often characterized by its large, colorful leaves. This genus includes several varieties that are popular in landscaping and container gardening for their vibrant and diverse leaf patterns, which can range from white to pink to deep green.

The other options provided refer to different plant species that do not belong to the Caladium genus. Schizachyrium scoparium, commonly known as little bluestem, is a grass species native to North America. Sedum sp. encompasses a wide variety of succulent plants known commonly as stonecrops. Rudbeckia sp. includes plants such as black-eyed Susans, which are flowering perennials. None of these options relate to the Caladium genus, which is exclusively represented by the correct scientific name.