| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SAEUS | Salicornia europaea L. var. simplex auct. non (Pursh) Fern. | Salicornia virginica | Chenopodiaceae
|
| SAEU | Salicornia europaea auct. non L. | Salicornia maritima | Chenopodiaceae
|
| SAEU2 | Salicornia europaea sensu Wolff & Jefferies, non L. | Salicornia virginica | Chenopodiaceae
|
| SAHE6 | Salicornia herbacea auct. non (L.) L. | Salicornia maritima | Chenopodiaceae
|
| SAMA11 | Salicornia maritima Wolff & Jefferies | slender grasswort | Chenopodiaceae
|
| SAMU3 | Salicornia mucronata Bigelow, non Lag. | Salicornia bigelovii | Chenopodiaceae
|
| SAPA29 | Salicornia pacifica Standl. | Sarcocornia pacifica | Chenopodiaceae
|
| SAPE | Salicornia perennis P. Mill. | Sarcocornia perennis | Chenopodiaceae
|
| SAPR11 | Salicornia prostrata auct. non Pallas | Salicornia maritima | Chenopodiaceae
|
| SARA6 | Salicornia ramosissima auct. non J. Woods | Salicornia maritima | Chenopodiaceae
|
| SARU | Salicornia rubra A. Nels. | red swampfire | Chenopodiaceae
|
| SASU2 | Salicornia subterminalis Parish | Arthrocnemum subterminale | Chenopodiaceae
|
| SAUT | Salicornia utahensis Tidestrom | Sarcocornia utahensis | Chenopodiaceae
|
| SAVI | Salicornia virginica L. | Virginia glasswort | Chenopodiaceae
|
| SALIC | Salicornia L. | pickleweed | Chenopodiaceae
|
| SAAC3 | Salix acutidens Rydb. | Salix eriocephala | Salicaceae
|
| SAAC2 | Salix acutifolia auct. non Hook. | Salix arbusculoides | Salicaceae
|
| SAAD2 | Salix adenophylla Hook. | Salix cordata | Salicaceae
|
| SAALL2 | Salix alaxensis (Anderss.) Coville ssp. longistylis (Rydb.) Hult�n | Salix alaxensis var. longistylis | Salicaceae
|
| SAALA | Salix alaxensis (Anderss.) Coville var. alaxensis | feltleaf willow | Salicaceae
|
| SAALL | Salix alaxensis (Anderss.) Coville var. longistylis (Rydb.) Schneid. | feltleaf willow | Salicaceae
|
| SAALO | Salix alaxensis (Anderss.) Coville var. obovalifolia Ball | Salix alaxensis var. alaxensis | Salicaceae
|
| SAAL | Salix alaxensis (Anderss.) Coville | feltleaf willow | Salicaceae
|
| SAALC2 | Salix alba L. ssp. caerulea (Sm.) Rech. f. | Salix alba | Salicaceae
|
| SAALV2 | Salix alba L. ssp. vitellina (L.) Arcang. | Salix alba | Salicaceae
|
| SAALC | Salix alba L. var. caerulea (Sm.) Sm. | Salix alba | Salicaceae
|
| SAALC3 | Salix alba L. var. calva G.F.W. Mey. | Salix alba | Salicaceae
|
| SAALV | Salix alba L. var. vitellina (L.) Stokes | Salix alba | Salicaceae
|
| SAAL2 | Salix alba L. | white willow | Salicaceae
|
| SAAL15 | Salix albertana Rowlee | Salix barrattiana | Salicaceae
|
| SAAL10 | Salix aliena Flod. | Salix setchelliana | Salicaceae
|
| SAAL13 | Salix alpina Walt. | Salix humilis var. tristis | Salicaceae
|
| SAAM9 | Salix ambigua Pursh, non Ehrh. | Salix nigra | Salicaceae
|
| SAAM7 | Salix amelanchieroides L. Kelso | Salix monticola | Salicaceae
|
| SAAM6 | Salix amphibia Small | Salix caroliniana | Salicaceae
|
| SAAM8 | Salix amplifolia Coville | Salix hookeriana | Salicaceae
|
| SAAMW | Salix amygdaloides Anderss. var. wrightii (Anderss.) Schneid. | Salix amygdaloides | Salicaceae
|
| SAAM2 | Salix amygdaloides Anderss. | peachleaf willow | Salicaceae
|
| SAAN7 | Salix ancorifera Fern. | Salix discolor | Salicaceae
|
| SAANA | Salix anglorum Cham. var. antiplasta Schneid. | Salix arctica | Salicaceae
|
| SAANA2 | Salix anglorum Cham. var. araioclada Schneid. | Salix arctica | Salicaceae
|
| SAANK | Salix anglorum Cham. var. kophophylla Schneid. | Salix arctica | Salicaceae
|
| SAAN8 | Salix anglorum Cham. | Salix phlebophylla | Salicaceae
|
| SAAN5 | Salix anglorum auct. non Cham. | Salix arctica | Salicaceae
|
| SAAN9 | Salix angustata Pursh | Salix eriocephala | Salicaceae
|
| SAARL2 | Salix arbuscula L. var. labradorica (Anderss.) Anderss. | Salix uva-ursi | Salicaceae
|
| SAARG2 | Salix arbusculoides Anderss. var. glabra (Anderss.) Anderss. ex Schneid. | Salix pulchra | Salicaceae
|
| SAAR3 | Salix arbusculoides Anderss. | littletree willow | Salicaceae
|
| SAAR20 | Salix arbutifolia auct. non Pallas | Salix fuscescens | Salicaceae
|
| SAARC | Salix arctica Pallas ssp. crassijulis (Trautv.) Skvort. | Salix arctica | Salicaceae
|
| SAARP | Salix arctica Pallas ssp. petraea (Anderss.) A.& D. L�ve & Kapoor | Salix petrophila | Salicaceae
|
| SAART | Salix arctica Pallas ssp. tortulosa (Trautv.) Hult�n | Salix arctica | Salicaceae
|
| SAARA | Salix arctica Pallas var. antiplasta (Schneid.) Fern. | Salix arctica | Salicaceae
|
| SAARA2 | Salix arctica Pallas var. araioclada (Schneid.) Raup | Salix arctica | Salicaceae
|
| SAARB | Salix arctica Pallas var. brownei Anderss. | Salix arctica | Salicaceae
|
| SAARC2 | Salix arctica Pallas var. caespitosa (Kennedy) L. Kelso | Salix petrophila | Salicaceae
|
| SAARG | Salix arctica Pallas var. graminifolia (E.H. Kelso) L. Kelso | Salix petrophila | Salicaceae
|
| SAARK | Salix arctica Pallas var. kophophylla (Schneid.) Polunin | Salix arctica | Salicaceae
|
| SAARP3 | Salix arctica Pallas var. pallasii (Anderss.) Kurtz | Salix arctica | Salicaceae
|
| SAARP5 | Salix arctica Pallas var. petraea (Anderss.) Bebb | Salix petrophila | Salicaceae
|
| SAARP4 | Salix arctica Pallas var. petrophila (Rydb.) L. Kelso | Salix petrophila | Salicaceae
|
| SAARS | Salix arctica Pallas var. subcordata (Anderss.) Schneid. | Salix glauca ssp. glauca var. villosa | Salicaceae
|
| SAART2 | Salix arctica Pallas var. tortulosa (Trautv.) Raup | Salix arctica | Salicaceae
|
| SAAR4 | Salix arctica Liebm., non Pallas | Salix arctophila | Salicaceae
|
| SAAR27 | Salix arctica Pallas | arctic willow | Salicaceae
|
| SAAR16 | Salix arctica R. Br. ex Richards., non Pallas | Salix arctica | Salicaceae
|
| SAAR15 | Salix arctolitoralis Hult�n | Salix ovalifolia var. arctolitoralis | Salicaceae
|
| SAARL | Salix arctophila Cockerell ex Heller var. lejocarpa (Anderss.) Schneid. | Salix arctophila | Salicaceae
|
| SAAR6 | Salix arctophila Cockerell ex Heller | northern willow | Salicaceae
|
| SAAR18 | Salix argophylla Nutt. | Salix exigua | Salicaceae
|
| SAARA3 | Salix arguta Anderss. var. alpigena Anderss. | Salix serissima | Salicaceae
|
| SAARE | Salix arguta Anderss. var. erythrocoma (Anderss.) Anderss. | Salix lucida ssp. lasiandra | Salicaceae
|
| SAARH | Salix arguta Anderss. var. hirtisquama (Anderss.) Anderss. | Salix lucida ssp. lucida | Salicaceae
|
| SAARL3 | Salix arguta Anderss. var. lasiandra (Benth.) Anderss. | Salix lucida ssp. lasiandra | Salicaceae
|
| SAARP2 | Salix arguta Anderss. var. pallescens Anderss. | Salix serissima | Salicaceae
|
| SAAR17 | Salix arguta Anderss. | Salix lucida ssp. lasiandra | Salicaceae
|
| SAARD | Salix argyrocarpa Anderss. var. denudata Anderss. | Salix argyrocarpa | Salicaceae
|
| SAAR7 | Salix argyrocarpa Anderss. | Labrador willow | Salicaceae
|
| SAAR14 | Salix arizonica Dorn | Arizona willow | Salicaceae
|
| SAAS2 | Salix astatulana Murrill & Palmer | Salix floridana | Salicaceae
|
| SAAT | Salix athabascensis Raup | Athabasca willow | Salicaceae
|
| SAAT2 | Salix atrocinerea Brot. | Salix cinerea ssp. oleifolia | Salicaceae
|
| SAAU9 | Salix aurita L. | eared willow | Salicaceae
|
| SAAU5 | Salix austinae Bebb | Salix lemmonii | Salicaceae
|
| SABA2 | Salix babylonica auct. non L. | Salix pendulina | Salicaceae
|
| SABA2 | Salix babylonica auct. non L. | Salix sepulcralis | Salicaceae
|
| SABA11 | Salix bakeri von Seem. | Salix lasiolepis var. lasiolepis | Salicaceae
|
| SABAA3 | Salix balsamifera (Hook.) Barratt ex Anderss. var. alpestris Bebb | Salix pyrifolia | Salicaceae
|
| SABAL4 | Salix balsamifera (Hook.) Barratt ex Anderss. var. lanceolata Bebb | Salix pyrifolia | Salicaceae
|
| SABAV2 | Salix balsamifera (Hook.) Barratt ex Anderss. var. vegeta Bebb | Salix pyrifolia | Salicaceae
|
| SABA12 | Salix balsamifera (Hook.) Barratt ex Anderss. | Salix pyrifolia | Salicaceae
|
| SABAA | Salix barclayi Anderss. var. angustifolia (Anderss.) Anderss. ex Schneid. | Salix barclayi | Salicaceae
|
| SABAC2 | Salix barclayi Anderss. var. cochetopiana L. Kelso | Salix monticola | Salicaceae
|
| SABAC3 | Salix barclayi Anderss. var. commutata (Bebb) L. Kelso | Salix commutata | Salicaceae
|
| SABAC | Salix barclayi Anderss. var. conjuncta (Bebb) Ball ex Schneid. | Salix barclayi | Salicaceae
|
| SABAH | Salix barclayi Anderss. var. hebecarpa Anderss. | Salix pulchra | Salicaceae
|
| SABAN | Salix barclayi Anderss. var. neomexicana (E.H. Kelso) L. Kelso | Salix monticola | Salicaceae
|
| SABAP3 | Salix barclayi Anderss. var. padophylla (Rydb.) L. Kelso | Salix monticola | Salicaceae
|
| SABAP2 | Salix barclayi Anderss. var. pseudomonticola (Ball) L. Kelso | Salix pseudomonticola | Salicaceae
|
| SABAR | Salix barclayi Anderss. var. resurrectionis L. Kelso | Salix monticola | Salicaceae
|
| SABAU | Salix barclayi Anderss. var. uncompahgre L. Kelso | Salix monticola | Salicaceae
|