Crassulaceae - Genus Monanthes - Monanthes subcrassicaulis

 Monanthes subcrassicaulis (Kuntze) Praeger

This is a very doubtful species. Praeger and Bramwell accept this as a real species there where Nyffeler considers it as a syn. of an on La Gomera growing Monanthes who should be the M. muralis.  
On the first place the   description of the Monanthes muralis those not fit to the Monanthes subcrassicaulis. The M. muralis is forming long branches pending alongside the rocky walls, the subcrassicaulis has very tinny rosettes on a very short creeping stem and this is growing on Tenerife an never seen elsewhere. If the two should have more resemblance and both should grow as well on Tenerife as on La Gomera then I should be ready to take it in consideration, but.....

I know only one finding place for this species and this is in the Teno Mountains near the place known as Cruz de Cilda near Masca.

For me the doubt should be faster coming from  the  of the Monanthes polyphylla who is nearly the same. Could be that our M. subcrassicaulis is crowing under very bad condition , and this is so, the adaption to this growing conditions gave difference  in his appearance.

I let you make your conclusions having a look to added pics.    

This is the site of the Monanthes subcrassicaulis

Monanthes subcrassicaulis

Monanthes subcrassicaulis

Monanthes subcrassicaulis

Monanthes subcrassicaulis