First Den. and clueless!

[cneos]

One of the parents may be Den. Lois Anderson - (Louise Anderson). Den. Lois Anderson is Hawaii Nui x Den. phalaenopsis. The influence of dendrobium phalaenopsis is very strong in your plant.

[cneos]

Btw, if there's a questionable name or spelling of a plants name that you're trying to look up, use the string feature of the database.

For the above search, I typed Den (for Dendrobium), then Anderson for the grex name and voila, the search brings up everything that has 'anderson' in the string, including sanderson and 'Lois Anderson'

Lois Anderson was registered in the 1940s; as yet, there is no registered name for the cross with Mary Trowse.