I am going to post all the forms of P. mt lewis here. In the USA there are a few forms in cultivation. 1.Standard form has normal shield with Medium size fertile fronds. 2. Standard form but with wide shields 3. Wide fertile fronds 4. Two form of thin fertile fronds.
I like the Thin fertile frond the best.
I have not see any DNA work done on this plant so I cant say if it is a true species or not. The original plants where collected on Mt lewis AUS. Seams to be a sport of Platycerium willinckii.
Easy to grow, removing pups should be done when the pups are larger. The roots do not develop as deep on young plants.
If interested contact
platyceriumferns@gmail.com or Just ask wanna if she has them...... Pot your photos of your P. Mt lewis here I'd like to see the forms you have.