| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PHBA | Phacelia barnebyana J.T. Howell | Barneby's phacelia | Hydrophyllaceae
|
| PHBE3 | Phacelia beatleyae Reveal & Constance | Beatley's phacelia | Hydrophyllaceae
|
| PHBI4 | Phacelia bicknellii Small | Phacelia purshii | Hydrophyllaceae
|
| PHBIL | Phacelia bicolor Torr. ex S. Wats. var. leibergii (Brand) A. Nels. & J.F. Macbr. | Phacelia leibergii | Hydrophyllaceae
|
| PHBI | Phacelia bicolor Torr. ex S. Wats. | twocolor phacelia | Hydrophyllaceae
|
| PHBIP | Phacelia bipinnatifida Michx. var. plummeri Wood | Phacelia bipinnatifida | Hydrophyllaceae
|
| PHBI2 | Phacelia bipinnatifida Michx. | fernleaf phacelia | Hydrophyllaceae
|
| PHBO | Phacelia bolanderi Gray | Bolander's phacelia | Hydrophyllaceae
|
| PHBO4 | Phacelia bombycina Woot. & Standl. | Mangas Spring phacelia | Hydrophyllaceae
|
| PHBO8 | Phacelia boykinii (Gray) Small | Phacelia purshii | Hydrophyllaceae
|
| PHBR | Phacelia brachyloba (Benth.) Gray | shortlobe phacelia | Hydrophyllaceae
|
| PHBR8 | Phacelia brevistyla Buckl. | Phacelia bipinnatifida | Hydrophyllaceae
|
| PHBR2 | Phacelia breweri Gray | Brewer's phacelia | Hydrophyllaceae
|
| PHCA43 | Phacelia caerulea Greene | skyblue phacelia | Hydrophyllaceae
|
| PHCAB | Phacelia californica Cham. var. bernardina (Greene) Jepson | Phacelia imbricata ssp. imbricata | Hydrophyllaceae
|
| PHCAJ | Phacelia californica Cham. var. jacintensis Dundas | Phacelia mutabilis | Hydrophyllaceae
|
| PHCAP3 | Phacelia californica Cham. var. patula (Brand) Jepson | Phacelia imbricata ssp. patula | Hydrophyllaceae
|
| PHCA | Phacelia californica Cham. | California phacelia | Hydrophyllaceae
|
| PHCA2 | Phacelia calthifolia Brand | calthaleaf phacelia | Hydrophyllaceae
|
| PHCAC2 | Phacelia campanularia Gray ssp. campanularia | desertbells | Hydrophyllaceae
|
| PHCAV | Phacelia campanularia Gray ssp. vasiformis Gillett | desertbells | Hydrophyllaceae
|
| PHCA3 | Phacelia campanularia Gray | desertbells | Hydrophyllaceae
|
| PHCA15 | Phacelia capitata Kruckeberg | clustered phacelia | Hydrophyllaceae
|
| PHCE | Phacelia cephalotes Gray | virgin phacelia | Hydrophyllaceae
|
| PHCIH4 | Phacelia cicutaria Greene ssp. hispida (Gray) Beauchamp ex Thorne | Phacelia cicutaria var. hispida | Hydrophyllaceae
|
| PHCIC | Phacelia cicutaria Greene var. cicutaria | caterpillar phacelia | Hydrophyllaceae
|
| PHCIH | Phacelia cicutaria Greene var. heliophila (J.F. Macbr.) J.T. Howell | Phacelia vallis-mortae var. heliophila | Hydrophyllaceae
|
| PHCIH2 | Phacelia cicutaria Greene var. hispida (Gray) J.T. Howell | caterpillar phacelia | Hydrophyllaceae
|
| PHCIH3 | Phacelia cicutaria Greene var. hubbyi (J.F. Macbr.) J.T. Howell | caterpillar phacelia | Hydrophyllaceae
|
| PHCI | Phacelia cicutaria Greene | caterpillar phacelia | Hydrophyllaceae
|
| PHCIC2 | Phacelia ciliata Benth. var. ciliata | Great Valley phacelia | Hydrophyllaceae
|
| PHCIO | Phacelia ciliata Benth. var. opaca J.T. Howell | Great Valley phacelia | Hydrophyllaceae
|
| PHCI2 | Phacelia ciliata Benth. | Great Valley phacelia | Hydrophyllaceae
|
| PHCI7 | Phacelia ciliosa (Rydb.) Rydb. | Phacelia sericea ssp. ciliosa | Hydrophyllaceae
|
| PHCI3 | Phacelia cinerea Eastw. ex J.F. Macbr. | Phacelia distans | Hydrophyllaceae
|
| PHCO | Phacelia coerulea Greene [orthographic variant] | Phacelia caerulea | Hydrophyllaceae
|
| PHCO18 | Phacelia congdonii Greene | Congdon's phacelia | Hydrophyllaceae
|
| PHCOD | Phacelia congesta Hook. var. dissecta Gray | Phacelia congesta | Hydrophyllaceae
|
| PHCOR | Phacelia congesta Hook. var. rupestris (Greene) J.F. Macbr. | Phacelia rupestris | Hydrophyllaceae
|
| PHCO2 | Phacelia congesta Hook. | caterpillars | Hydrophyllaceae
|
| PHCO19 | Phacelia constancei Atwood | Constance's phacelia | Hydrophyllaceae
|
| PHCO20 | Phacelia cookei Constance & Heckard | Cooke's phacelia | Hydrophyllaceae
|
| PHCO21 | Phacelia corrugata A. Nels. | Phacelia crenulata var. corrugata | Hydrophyllaceae
|
| PHCO3 | Phacelia corymbosa Jepson | serpentine phacelia | Hydrophyllaceae
|
| PHCO30 | Phacelia covillei S. Wats. | Coville's phacelia | Hydrophyllaceae
|
| PHCR5 | Phacelia crassifolia Torr. ex S. Wats. | Phacelia gymnoclada | Hydrophyllaceae
|
| PHCRA2 | Phacelia crenulata Torr. ex S. Wats. var. ambigua (M.E. Jones) J.F. Macbr. | purplestem phacelia | Hydrophyllaceae
|
| PHCRA | Phacelia crenulata Torr. ex S. Wats. var. angustifolia Atwood | cleftleaf phacelia | Hydrophyllaceae
|
| PHCRC | Phacelia crenulata Torr. ex S. Wats. var. corrugata (A. Nels.) Brand | cleftleaf wildheiotrope | Hydrophyllaceae
|
| PHCRC3 | Phacelia crenulata Torr. ex S. Wats. var. crenulata | cleftleaf wildheliotrope | Hydrophyllaceae
|
| PHCRF | Phacelia crenulata Torr. ex S. Wats. var. funerea J. Voss ex Munz | Phacelia crenulata var. crenulata | Hydrophyllaceae
|
| PHCRM | Phacelia crenulata Torr. ex S. Wats. var. minutiflora (J. Voss) Jepson | cleftleaf wildheliotrope | Hydrophyllaceae
|
| PHCRV2 | Phacelia crenulata Torr. ex S. Wats. var. vulgaris Brand | Phacelia crenulata var. crenulata | Hydrophyllaceae
|
| PHCR | Phacelia crenulata Torr. ex S. Wats. | cleftleaf wildheliotrope | Hydrophyllaceae
|
| PHCR7 | Phacelia cronquistiana Welsh | Cronquist's phacelia | Hydrophyllaceae
|
| PHCRD | Phacelia cryptantha Greene var. derivata J. Voss | Phacelia cryptantha | Hydrophyllaceae
|
| PHCR2 | Phacelia cryptantha Greene | hiddenflower phacelia | Hydrophyllaceae
|
| PHCUM | Phacelia curvipes Torr. ex S. Wats. var. macrantha (Parish) Munz | Phacelia davidsonii | Hydrophyllaceae
|
| PHCU | Phacelia curvipes Torr. ex S. Wats. | Washoe phacelia | Hydrophyllaceae
|
| PHDA | Phacelia dalesiana J.T. Howell | Scott Mountain phacelia | Hydrophyllaceae
|
| PHDA3 | Phacelia davidsonii Gray | Davidson's phacelia | Hydrophyllaceae
|
| PHDED | Phacelia demissa Gray var. demissa | Intermountain phacelia | Hydrophyllaceae
|
| PHDEH | Phacelia demissa Gray var. heterotricha J.T. Howell | Phacelia demissa var. demissa | Hydrophyllaceae
|
| PHDEM | Phacelia demissa Gray var. minor Atwood | Intermountain phacelia | Hydrophyllaceae
|
| PHDET | Phacelia demissa Gray var. typica J.T. Howell | Phacelia demissa var. demissa | Hydrophyllaceae
|
| PHDE | Phacelia demissa Gray | Intermountain phacelia | Hydrophyllaceae
|
| PHDE2 | Phacelia denticulata Osterhout | Rocky Mountain phacelia | Hydrophyllaceae
|
| PHDE13 | Phacelia depauperata Woot. & Standl. | Phacelia popei | Hydrophyllaceae
|
| PHDE22 | Phacelia deserta A. Nels. | Phacelia glandulosa var. deserta | Hydrophyllaceae
|
| PHDIA | Phacelia distans Benth. var. australis Brand | Phacelia distans | Hydrophyllaceae
|
| PHDI | Phacelia distans Benth. | distant phacelia | Hydrophyllaceae
|
| PHDIC | Phacelia divaricata (Benth.) Gray var. congdonii (Greene) Munz | Phacelia congdonii | Hydrophyllaceae
|
| PHDIC2 | Phacelia divaricata (Benth.) Gray var. continentis (J.T. Howell) Munz | Phacelia insularis var. continentis | Hydrophyllaceae
|
| PHDII2 | Phacelia divaricata (Benth.) Gray var. insularis (Munz) Munz | Phacelia insularis var. insularis | Hydrophyllaceae
|
| PHDI2 | Phacelia divaricata (Benth.) Gray | divaricate phacelia | Hydrophyllaceae
|
| PHDOC2 | Phacelia douglasii (Benth.) Torr. ssp. cryptantha (Brand) Beauchamp | Phacelia stellaris | Hydrophyllaceae
|
| PHDOC | Phacelia douglasii (Benth.) Torr. var. cryptantha Brand | Phacelia stellaris | Hydrophyllaceae
|
| PHDOD | Phacelia douglasii (Benth.) Torr. var. douglasii | Douglas' phacelia | Hydrophyllaceae
|
| PHDOP | Phacelia douglasii (Benth.) Torr. var. petrophila Jepson | rockloving phacelia | Hydrophyllaceae
|
| PHDO | Phacelia douglasii (Benth.) Torr. | Douglas' phacelia | Hydrophyllaceae
|
| PHDUD | Phacelia dubia (L.) Trel. var. dubia | smallflower phacelia | Hydrophyllaceae
|
| PHDUF | Phacelia dubia (L.) Trel. var. fallax (Fern.) Gleason | Phacelia maculata | Hydrophyllaceae
|
| PHDUG | Phacelia dubia (L.) Trel. var. georgiana McVaugh | smallflower phacelia | Hydrophyllaceae
|
| PHDUI | Phacelia dubia (L.) Trel. var. interior Fern. | interior phacelia | Hydrophyllaceae
|
| PHDU | Phacelia dubia (L.) Trel. | smallflower phacelia | Hydrophyllaceae
|
| PHEG | Phacelia egena (Greene ex Brand) Greene ex J.T. Howell | Kaweah River phacelia | Hydrophyllaceae
|
| PHEIB | Phacelia eisenii Brandeg. var. brandegeeana J.T. Howell | Phacelia eisenii | Hydrophyllaceae
|
| PHEI | Phacelia eisenii Brandeg. | Eisen's phacelia | Hydrophyllaceae
|
| PHER3 | Phacelia eremophila Greene | Phacelia ramosissima var. eremophila | Hydrophyllaceae
|
| PHEX | Phacelia exilis (Gray) G.L. Lee | Transverse Range phacelia | Hydrophyllaceae
|
| PHFI | Phacelia filiformis Brand | narrow phacelia | Hydrophyllaceae
|
| PHFI2 | Phacelia fimbriata Michx. | fringed phacelia | Hydrophyllaceae
|
| PHFL | Phacelia floribunda Greene | southern island phacelia | Hydrophyllaceae
|
| PHFO2 | Phacelia formosula Osterhout | Northpark phacelia | Hydrophyllaceae
|
| PHFR | Phacelia franklinii (R. Br.) Gray | Franklin's phacelia | Hydrophyllaceae
|
| PHFR2 | Phacelia fremontii Torr. | Fremont's phacelia | Hydrophyllaceae
|
| PHFRD | Phacelia frigida Greene ssp. dasyphylla Heckard | Phacelia hastata var. dasyphylla | Hydrophyllaceae
|
| PHFR3 | Phacelia frigida Greene | Phacelia hastata var. compacta | Hydrophyllaceae
|
| PHGE2 | Phacelia geraniifolia Brand | geraniumleaf phacelia | Hydrophyllaceae
|
| PHGI | Phacelia gilioides Brand | Brand's phacelia | Hydrophyllaceae
|
| PHGL12 | Phacelia glaberrima (Torr. ex S. Wats.) J.T. Howell | southwestern phacelia | Hydrophyllaceae
|