Silene ciliata
Silene cintrana
Silene foetida subsp. foetida
Silene legionensis
Silene longicilia
Silene mellifera
Silene muscipula
Silene rothmaleri
Sorbus aria
Sorbus latifolia
Sorbus torminalis
Sparganium angustifolium
Spergularia fimbriata
Spergularia tangerina
Spiraea hypericifolia subsp. obovata
Spiranthes aestivalis
Stachys palustris
Succisa pinnatifida
Succisella carvalhoana
Succowia balearica
Tanacetum microphyllum
Taraxacum estrelense
Taraxacum triforme
Taxus baccata
Teucrium salviastrum
Thesium humile
Thymelaea broteriana
Thymelaea coridifolia subsp. dendrobryum
Thymelaea gussonei
Thymelaea hirsuta