| Family | subfamily | Genus | Species | |
|---|---|---|---|---|
| Salicaceae | Salix L. | Salix mucronata Thunb. | Details | |
| Salicaceae | Salix L. | Salix tetrasperma Roxb. | Details | |
| Salicaceae | Populus L. | Populus euphratica Oliv. | Details | |
| Salvadoraceae | Salvadora L. | Salvadora persica L. var.persica | Details | |
| Santalaceae | Thesium L. | Thesium humile Vahl var, humile | Details | |
| Santalaceae | Thesium L. | Thesium humile Vahl var. maritima (N.D.Simpson)Sa'ad | Details | |
| Santalaceae | Thesium L. | Thesium bergeri Zucc. | Details | |
| Sapindaceae | Cardiospermum L. | Cardiospermum halicacabum L. | Details | |
| Sapindaceae | Dodonaea Mill. | Dodonaea viscosa (L.) Jacq. | Details | |
| Scrophulariaceae Juss. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Linaria Mill. | Linaria tenuis (Viv.)Spreng. | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Scrophularia L. | Scrophularia arguta Sol. | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Scrophularia L. | Scrophularia deserti Delile | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Scrophularia L. | Scrophularia xanthoglossa Boiss. | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Scrophularia L. | Scrophularia canina L. | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Scrophularia L. | Scrophularia syriaca Benth. | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Scrophularia L. | Scrophularia libanotica Boiss. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum fruticulosum Post. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum sinaiticum Benth. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum sinuatum L. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum eremobium Murb. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum letourneuxii Asch. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum schimperianum Boiss. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Verbascum L. | Verbascum decaisneanum Kuntze | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Anticharis Endl. | Anticharis glandulosa Asch. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Anticharis Endl. | Anticharis arabica Endl.. | Details |
| Scrophulariaceae Juss. (s.s.) | Verbascoideae | Anticharis Endl. | Anticharis senegalensis (Walp.) Bhandari | Details |
| Scrophulariaceae Juss. (s.s.) | Scrophularoideae Melch. | Jamesbrittenia Kuntze | Jamesbrittenia dissecta (Delile) Kuntze | Details |
| Scrophulariaceae Juss. s.l. (Family [APG III]: Phrymaceae) | Scrophularoideae Melch. | Peplidium Delile | Peplidium maritimum (L. f.) Asch. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Orobanchaceae Vent.) | Rhinanthoideae Wettst. | Striga Lour | Striga hermonthica (Delile) Benth. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Orobanchaceae Vent.) | Rhinanthoideae Wettst. | Striga Lour | Striga asiatica (L.) Kuntze | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Linderniaceae) | Scrophularoideae Melch. | Lindernia All. | Lindernia parviflora (Roxb.) Haines | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Orobanchaceae) | Parentucellia Viv. | Parentucellia viscosa (L.) Caruel | Details | |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica rubrifolia Boiss,. subsp. respectatissima M.A.Fisch. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica persica Poir., | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica campylopoda Boiss. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica cymbalaria Bodard | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica polita Fr. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica anagalloides Guss. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica anagallis-aquatica L. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica scardica Griseb. subsp. africana Chrtek & Osb.-Kos. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica catenata Pennell subsp. pseudocatenata Chrtek & Osb. -Kos. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica kaiseri Täckh. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Rhinanthoideae Wettst. | Veronica L. | Veronica musa Täckh. & El Hadidi | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Nanorrhinum Betsche | Nanorrhinum acerbianum (Boiss.) Betsche | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Nanorrhinum Betsche | Nanorrhinum macilentum (Decne.) Betsche | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Nanorrhinum Betsche | Nanorrhinum heterophyllum (Schousb.) Ghebr. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Kickxia Dumort. | Kickxia pseudoscoparia V.W.Sm. & D.A.Sutton | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Nanorrhinum Betsche | Nanorrhinum hastatum (R.Br. ex Benth.) Ghebr. | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Linaria Mill. | Linaria haelava (Forssk.) Delile | Details |
| Scrophulariaceae Juss. s.l. [Family (APG III]: Plantaginaceae) | Scrophularoideae Melch. | Linaria Mill. | Linaria joppensis Bornm. | Details |