Reddit mentions of Mediterranean Plants & Gardens

The garden at Villa Noailles (1926) by the Armenian Architect Gabriel Guevrekian.This is described as a "Cubist Garden".

EDIT:

The client who comissioned the villa, Charles de Noailles, was passionate about flowers and was president of the French Horticultural Society, as well as being the author of a significant book on the flora of the Mediterranean, spent his later years dedicated towards the improvement and maintenance of his gardens at Hyères, Grasse and Fontainebleau.

There is an edition in English that is co-authered by Roy Lancaster
Mediterranean Plants & Gardens (2nd Edition): I don't know how faithful this is to the original.

In the wikipedia page it refers to Imbert's book
The Modernist Garden in France
and


Unnatural Acts: Propositions for a New French Architecture


>He (Noailles) wanted artifice in his landscape. The Villa commanded great views of the Côte d’Azur and Noailles wished to contrast this strongly with an enclosed and architectonic ensemble that framed the natural whilst delineating ownership.

The latter book is describes:
The tendency to use organic elements as if they were artificial sources of color and design rather than as volumes meant to be experienced through time. Concentrates on gardens designed for Charles and Marie-Laure de Noailles in Paris (ca.1926, by the Vera brothers) and Hyères (1927, by Guevrekian), and for Jeanne Tachard in La Celle-Saint-Cloud (1923, by Legrain).

Guevrekian's original planting was removed by Noailles at an early date. Now the planting (not by Noailles) looks rather simple. There are a few early photographs in black and white in this article on the the house by Abitare.
Here I imagine the seasonal impact of the garden was rather different.

EDIT:

Searching for the original chromatic planting (Yellow Tulips) I found a good analysis of Guevrekian's early gardens by George Dodds "Freedom from the Garden - Gabriel Guevrekian and a New Territory of Experience" that can be found in the book "Tradition and Innovation in French Garden Art, Chapters of a New History" Dixon Hunt, Conan, Goldstein.

From the model it describes the black pool at the base of the garden. It is almost as if it could have been a stepped fountain, with the source as the axial pool flowing around islands of yellow tulips.

It can also be seen in Man Ray's short film (1929) "Les Mystères du Château du Dé" - (starts 6:09, view from inside 6:30).