What is the cultivar name for Lady Banks Rose?

The cultivar name for Lady Banks Rose is indeed Rosa banksiae 'Lutea.' This specific cultivar is recognized for its unique traits, notably its small, delicate yellow flowers and the lack of thorns, distinguishing it from many other rose varieties. Lady Banks Rose is a climbing rose that is known for blooming profusely in the spring, making it a popular choice in gardens for its ornamental value.

The use of 'Lutea' as a cultivar name indicates that this variation of the Lady Banks Rose has a yellow hue, which is a defining characteristic. The genus Rosa encompasses all roses, but 'banksiae' specifies the particular species, which is endemic to China. The inclusion of 'Lutea' reflects the cultivar's color characteristic, providing essential details for identification and classification within botanical terms.

In contrast, the other options either refer to unrelated species or lack specificity in identifying the Lady Banks Rose. Rosa minora is not a recognized species related to Lady Banks Rose, Rosa sp. is too vague as it simply indicates a rose species without further identification, and Rosmarinus officinalis refers to rosemary, which is completely unrelated to roses.