H. R. Toelken in his “Revision of the genus Crassula in southern Africa” calls this the most complex subspecies found in C. capitella, which in turn he refers to as a complex species.
The subspecies is widely distributed in the Eastern and Western Cape provinces, Limpopo and southeastern Namibia.
The white or pink flowers are borne in groups along an elongated inflorescence (up to 40 cm tall) and appear between November and March.
In cultivation one normally sees the form shown in the first four pictures.
The photo below shows plants as they are found in and around the Anysberg Nature reserve. They have beautifully marked leaves which are much shorter then one would expect in subsp. thyrsiflora.
As the reserve is on the western border of the distribution area of subsp. capitella, they may belong there, but I will have to see the flowers before being able to properly identify them.