As per
link,
P. tarminina is distinguished from
P. tripartita var.
mollissima by a number of features.
P. tarminina has small deciduous stipules while
P. tripartita var.
mollissima has larger, persistent stipules. The sepals and petals in
P. tarminina are perpendicular to the floral tube or are reflexed, whereas they are never so open in
P. tripartita var.
mollissima. They are also both much shorter in relation to the length of the floral tube in
P. tripartita var.
mollissima than in
P. tarminina.