| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PSLAA | Psoralea latestipulata Shinners var. appressa D.J. Ockendon | Pediomelum latestipulatum var. appressum | Fabaceae
|
| PSLA2 | Psoralea latestipulata Shinners | Pediomelum latestipulatum var. latestipulatum | Fabaceae
|
| PSLI | Psoralea linearifolia Torr. & Gray | Pediomelum linearifolium | Fabaceae
|
| PSLU | Psoralea lupinella Michx. | Orbexilum lupinellum | Fabaceae
|
| PSMA3 | Psoralea macrophylla Rowlee | Orbexilum macrophyllum | Fabaceae
|
| PSMAL | Psoralea macrostachya DC. var. longiloba (Rydb.) J.F. Macbr. | Hoita macrostachya | Fabaceae
|
| PSMAR | Psoralea macrostachya DC. var. rhombifolia Torr. | Hoita macrostachya | Fabaceae
|
| PSMA2 | Psoralea macrostachya DC. | Hoita macrostachya | Fabaceae
|
| PSME2 | Psoralea megalantha Woot. & Standl. | Pediomelum megalanthum var. megalanthum | Fabaceae
|
| PSMER2 | Psoralea mephitica S. Wats. var. retrorsa (Rydb.) Kearney & Peebles | Pediomelum megalanthum var. retrorsum | Fabaceae
|
| PSME3 | Psoralea mephitica S. Wats. | Pediomelum mephiticum | Fabaceae
|
| PSOB80 | Psoralea obtusifolia Torr. & Gray | Psoralidium tenuiflorum | Fabaceae
|
| PSON | Psoralea onobrychis Nutt. | Orbexilum onobrychis | Fabaceae
|
| PSOR2 | Psoralea orbicularis Lindl. | Hoita orbicularis | Fabaceae
|
| PSPA | Psoralea pariensis Welsh & Atwood | Pediomelum pariense | Fabaceae
|
| PSPE3 | Psoralea pedunculata (P. Mill.) Vail | Orbexilum pedunculatum var. pedunculatum | Fabaceae
|
| PSPE4 | Psoralea pentaphylla L. | Pediomelum pentaphyllum | Fabaceae
|
| PSPH | Psoralea physodes Dougl. ex Hook. | Rupertia physodes | Fabaceae
|
| PSPSE | Psoralea psoralioides (Walt.) Cory var. eglandulosa (Ell.) Freeman | Orbexilum pedunculatum var. pedunculatum | Fabaceae
|
| PSPSG | Psoralea psoralioides (Walt.) Cory var. gracilis (Torr. & Gray) Freeman | Orbexilum pedunculatum var. psoralioides | Fabaceae
|
| PSPS | Psoralea psoralioides (Walt.) Cory | Orbexilum pedunculatum var. psoralioides | Fabaceae
|
| PSRE | Psoralea reverchonii S. Wats. | Pediomelum reverchonii | Fabaceae
|
| PSRH | Psoralea rhombifolia Torr. & Gray | Pediomelum rhombifolium | Fabaceae
|
| PSRI | Psoralea rigida Parish | Rupertia rigida | Fabaceae
|
| PSRY | Psoralea rydbergii Cory | Pediomelum humile | Fabaceae
|
| PSSC7 | Psoralea scabra Nutt. | Psoralidium lanceolatum | Fabaceae
|
| PSSCB | Psoralea scaposa (Gray) J.F. Macbr. var. breviscapa Shinners | Pediomelum hypogaeum var. hypogaeum | Fabaceae
|
| PSSC8 | Psoralea scaposa (Gray) J.F. Macbr. | Pediomelum hypogaeum var. scaposum | Fabaceae
|
| PSSI | Psoralea simplex Nutt. ex Torr. & Gray | Orbexilum simplex | Fabaceae
|
| PSST3 | Psoralea stenostachys Rydb. | Psoralidium lanceolatum | Fabaceae
|
| PSST2 | Psoralea stipulata Torr. & Gray | Orbexilum stipulatum | Fabaceae
|
| PSST | Psoralea strobilina Hook. & Arn. | Hoita strobilina | Fabaceae
|
| PSSU3 | Psoralea subacaulis Torr. & Gray | Pediomelum subacaule | Fabaceae
|
| PSSUM | Psoralea subulata Bush var. minor Shinners | Pediomelum hypogaeum var. subulatum | Fabaceae
|
| PSSU | Psoralea subulata Bush | Pediomelum hypogaeum var. subulatum | Fabaceae
|
| PSTEB2 | Psoralea tenuiflora Pursh var. bigelovii (Rydb.) J.F. Macbr. | Psoralidium tenuiflorum | Fabaceae
|
| PSTEF2 | Psoralea tenuiflora Pursh var. floribunda (Nutt. ex Torr. & Gray) Rydb. | Psoralidium tenuiflorum | Fabaceae
|
| PSTE3 | Psoralea tenuiflora Pursh | Psoralidium tenuiflorum | Fabaceae
|
| PSTR | Psoralea trinervata (Rydb.) Standl. | Pediomelum pentaphyllum | Fabaceae
|
| PSVI2 | Psoralea virgata Nutt. | Orbexilum virgatum | Fabaceae
|
| PSAR5 | Psoralidium argophyllum (Pursh) Rydb. | Pediomelum argophyllum | Fabaceae
|
| PSBA7 | Psoralidium batesii Rydb. | Psoralidium tenuiflorum | Fabaceae
|
| PSDI4 | Psoralidium digitatum (Nutt.) Rydb. | Pediomelum digitatum | Fabaceae
|
| PSJU2 | Psoralidium junceum (Eastw.) Rydb. | rush lemonweed | Fabaceae
|
| PSLAS4 | Psoralidium lanceolatum (Pursh) Rydb. var. stenophyllum (Rydb.) Welsh | Psoralidium lanceolatum | Fabaceae
|
| PSLAS5 | Psoralidium lanceolatum (Pursh) Rydb. var. stenostachys (Rydb.) Welsh | Psoralidium lanceolatum | Fabaceae
|
| PSLA3 | Psoralidium lanceolatum (Pursh) Rydb. | lemon scurfpea | Fabaceae
|
| PSLIP | Psoralidium linearifolium (Torr. & Gray) Rydb. var. palodurense Tharp & Barkl. | Pediomelum linearifolium | Fabaceae
|
| PSLIT | Psoralidium linearifolium (Torr. & Gray) Rydb. var. texense Tharp & Barkl. | Pediomelum linearifolium | Fabaceae
|
| PSLI4 | Psoralidium linearifolium (Torr. & Gray) Rydb. | Pediomelum linearifolium | Fabaceae
|
| PSST4 | Psoralidium stenophyllum (Rydb.) Rydb. | Psoralidium lanceolatum | Fabaceae
|
| PSTE5 | Psoralidium tenuiflorum (Pursh) Rydb. | slimflower scurfpea | Fabaceae
|
| PSORA2 | Psoralidium Rydb. | scurfpea | Fabaceae
|
| PSCO10 | Psorinia conglomerata (Ach.) Gotth. Schneider | | Lecanoraceae
|
| PSORI | Psorinia Gotth. Schneider | psorinia | Lecanoraceae
|
| PSCUC | Psoroglaena cubensis Mull. Arg. var. cubensis | | Verrucariaceae
|
| PSCUT | Psoroglaena cubensis Mull. Arg. var. teretiloba O. Eriksson | | Verrucariaceae
|
| PSCU2 | Psoroglaena cubensis Mull. Arg. | | Verrucariaceae
|
| PSORO4 | Psoroglaena Mull. Arg. | psoroglaena | Verrucariaceae
|
| PSHY60 | Psoroma hypnorum (Vahl) Gray | bowl lichen | Pannariaceae
|
| PSTEB3 | Psoroma tenue Henssen var. borealis Henssen | northern bowl lichen | Pannariaceae
|
| PSTE13 | Psoroma tenue Henssen | bowl lichen | Pannariaceae
|
| PSORO2 | Psoroma Michaux | bowl lichen | Pannariaceae
|
| PSARA | Psorothamnus arborescens (Torr. ex Gray) Barneby var. arborescens | Mojave indigobush | Fabaceae
|
| PSARM | Psorothamnus arborescens (Torr. ex Gray) Barneby var. minutifolius (Parish) Barneby | Johnson's indigobush | Fabaceae
|
| PSARP | Psorothamnus arborescens (Torr. ex Gray) Barneby var. pubescens (Parish) Barneby | Mojave indigobush | Fabaceae
|
| PSARS | Psorothamnus arborescens (Torr. ex Gray) Barneby var. simplifolius (Parish) Barneby | California indigobush | Fabaceae
|
| PSAR4 | Psorothamnus arborescens (Torr. ex Gray) Barneby | Mojave indigobush | Fabaceae
|
| PSEM | Psorothamnus emoryi (Gray) Rydb. | dyebush | Fabaceae
|
| PSFRA | Psorothamnus fremontii (Torr. ex Gray) Barneby var. attenuatus Barneby | Fremont's dalea | Fabaceae
|
| PSFRF | Psorothamnus fremontii (Torr. ex Gray) Barneby var. fremontii | Fremont's dalea | Fabaceae
|
| PSFR | Psorothamnus fremontii (Torr. ex Gray) Barneby | Fremont's dalea | Fabaceae
|
| PSKI | Psorothamnus kingii (S. Wats.) Barneby | King's dalea | Fabaceae
|
| PSPOJ | Psorothamnus polydenius (Torr. ex S. Wats.) Rydb. var. jonesii Barneby | Jones' dalea | Fabaceae
|
| PSPOP | Psorothamnus polydenius (Torr. ex S. Wats.) Rydb. var. polydenius | Nevada dalea | Fabaceae
|
| PSPO | Psorothamnus polydenius (Torr. ex S. Wats.) Rydb. | Nevada dalea | Fabaceae
|
| PSSC5 | Psorothamnus schottii (Torr.) Barneby | Schott's dalea | Fabaceae
|
| PSSC6 | Psorothamnus scoparius (Gray) Rydb. | broom dalea | Fabaceae
|
| PSSP3 | Psorothamnus spinosus (Gray) Barneby | smoketree | Fabaceae
|
| PSTHT | Psorothamnus thompsoniae (Vail) Welsh & Atwood var. thompsoniae | Thompson's dalea | Fabaceae
|
| PSTHW | Psorothamnus thompsoniae (Vail) Welsh & Atwood var. whitingii (Kearney & Peebles) Barneby | Whiting's dalea | Fabaceae
|
| PSTH | Psorothamnus thompsoniae (Vail) Welsh & Atwood | Thompson's dalea | Fabaceae
|
| PSORO | Psorothamnus Rydb. | dalea | Fabaceae
|
| PSHA4 | Psorotichia hassei Fink | | Lichinaceae
|
| PSMI2 | Psorotichia minuta H. Magn. | | Lichinaceae
|
| PSNI3 | Psorotichia nigra H. Magn. | | Lichinaceae
|
| PSSC9 | Psorotichia schaereri (A. Massal.) Arnold | | Lichinaceae
|
| PSSE | Psorotichia segregata (Nyl.) Hasse | | Lichinaceae
|
| PSSQ | Psorotichia squamulosa Zahlbr. | | Lichinaceae
|
| PSORO3 | Psorotichia A. Massal. | psorotichia | Lichinaceae
|
| PSRU4 | Psorula rufonigra (Tuck.) Gotth. Schneider | | Psoraceae
|
| PSSC12 | Psorula scotopholis (Tuck.) Gotth. Schneider | Lecanora scotopholis | Lecanoraceae
|
| PSORU | Psorula Gotth. Schneider | psorula | Psoraceae
|
| PSKR | Psychilis kraenzlinii (Bello) Sauleda | Kraenzlin's peacock orchid | Orchidaceae
|
| PSKR2 | Psychilis krugii (Bello) Sauleda | Krug's peacock orchid | Orchidaceae
|
| PSMA9 | Psychilis macconnelliae Sauleda | island peacock orchid | Orchidaceae
|
| PSMO3 | Psychilis monensis Sauleda | royal peacock orchid | Orchidaceae
|
| PSRA2 | Psychilis �raganii Sauleda | | Orchidaceae
|
| PSYCH2 | Psychilis Raf. | peacock orchid | Orchidaceae
|
| PSPA9 | Psychopsis papilio (Lindl.) H.G. Jones | butterfly orchid | Orchidaceae
|
| PSYCH3 | Psychopsis Raf. | butterfly orchid | Orchidaceae
|