This is a list of plant Genera, Species & Cultivars ... - PlantFile USA

Sorbus x thuringiaca 'Gibbsii'
Spartium ( Fabaceae )
* Spartium junceum
Spathiphyllum ( Araceae )
* Spathiphyllum wallisii
Spathodea ( Bignoniaceae )
* Spathodea campanulata
Sphaeralcea ( Malvaceae )
* Sphaeralcea fendleri
* Sphaeralcea munroana
Spilanthes ( Asteraceae )
* Spilanthes oleracea
Spinifex ( Poaceae )
* Spinifex sericeus
Spiraea ( Rosaceae )
* Spiraea cantoniensis
* Spiraea japonica
Spiraea japonica 'Allgold'
Spiraea japonica 'Anthony Waterer'
Spiraea japonica 'Atrosanguinea'
Spiraea japonica 'Bullata'
Spiraea japonica 'Bumalda'
Spiraea japonica 'Coccinea'
Spiraea japonica 'Fortunei'
Spiraea japonica 'Frobelii'
Spiraea japonica 'Glabrata'
Spiraea japonica 'Golden Dome'
Spiraea japonica 'Golden Princess'
Spiraea japonica 'Goldmound'
Spiraea japonica 'Lemon Princess'
Spiraea japonica 'Little Princess'
Spiraea japonica 'Macrophylla'
Spiraea japonica 'Neon Flash'
Spiraea japonica 'Nyewoods'
Spiraea japonica 'Ovalifolia'
Spiraea japonica 'Ruberrima'
Spiraea japonica 'Shirobana'
* Spiraea thunbergii
* Spiraea trilobata
* Spiraea x bumalda
Spirea ( Rosaceae )
* Spirea x vanhouttei
Sporobolus ( Poaceae )
* Sporobolus indicus
Sprekelia ( Amaryllidaceae )
* Sprekelia formosissima
Stachys ( Labiatae / Lamiaceae )
* Stachys byzantina
Stachys byzantina 'Big Ears'
Stachys byzantina 'Cotton Boll'
Stachys byzantina 'Primrose Heron'
Stachys byzantina 'Silver Carpet'
Stachyurus ( Stachyuraceae )
* Stachyurus praecox
Stangeria ( Stangeriaceae )
* Stangeria eriopus
Stapelia ( Asclepiadaceae )
* Stapelia gigantea
Stenocarpus ( Proteaceae )
* Stenocarpus salignus