c. Longpenicellata
A Camellia species rather than a cultivar — C. longipedicellata is a wild species known for its notably long flower stalks.
Not a cultivar but a Camellia species — C. longipedicellata, characterized by its notably long pedicels (flower stalks), which give the species its name. Of botanical rather than horticultural interest. Does not appear in the International Camellia Register as a registered cultivar. Source: Limited information available.