The petal tube is sometimes pink to red with pink spots on a light colour inside the tube, or cream and without spots. The petal tube is mostly glabrous except that the inside of the tube is filled with long, soft hairs.
In some cases, the petal tube displays a pink to red hue with pink spots against a light background colour, or it may be cream-coloured without spots. The majority of the petal tube lacks hair, but its interior is lined with lengthy, gentle hairs.