| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PHPH5 | Phippsia phryganodes (Trin.) A.& D. Löve | Puccinellia phryganodes ssp. phryganodes | Poaceae
|
| PHSI5 | Phippsia sibirica (Holmb.) A.& D. Löve | Puccinellia distans ssp. borealis | Poaceae
|
| PHTE11 | Phippsia tenella (Lange) A.& D. Löve | Puccinellia tenella ssp. tenella | Poaceae
|
| PHVA6 | Phippsia vaginata (Lange) A.& D. Löve | Puccinellia vaginata | Poaceae
|
| PHVA7 | Phippsia vahliana (Liebm.) A.& D. Löve | Puccinellia vahliana | Poaceae
|
| PHWR4 | Phippsia wrightii (Scribn. & Merr.) A.& D. Löve | Puccinellia wrightii | Poaceae
|
| PHIPP | Phippsia (Trin.) R. Br. | icegrass | Poaceae
|
| PHAR9 | Phlebodium areolatum (Humb. & Bonpl. ex Willd.) Baker | Phlebodium pseudoaureum | Polypodiaceae
|
| PHAU6 | Phlebodium aureum (L.) J. Sm. | golden polypody | Polypodiaceae
|
| PHDE3 | Phlebodium decumanum (Willd.) J. Sm. | creeping golden polypody | Polypodiaceae
|
| PHPS | Phlebodium pseudoaureum (Cav.) Lellinger | false golden polypody | Polypodiaceae
|
| PHLEB | Phlebodium (R. Br.) J. Sm. | golden polypody | Polypodiaceae
|
| PHCO29 | Phlebotaenia cowellii Britt. | Polygala cowellii | Polygalaceae
|
| PHDI15 | Phlegmariurus dichotomus (Jacq.) W.H. Wagner | Huperzia dichotoma | Lycopodiaceae
|
| PHFI4 | Phlegmariurus filiformis (Sw.) W.H. Wagner | Huperzia filiformis | Lycopodiaceae
|
| PHMA24 | Phlegmariurus mannii (Hbd.) W.H. Wagner | Huperzia mannii | Lycopodiaceae
|
| PHNU4 | Phlegmariurus nutans (Brack.) W.H. Wagner | Huperzia nutans | Lycopodiaceae
|
| PHST16 | Phlegmariurus stemmermanniae A.C. Medeiros & W.H. Wagner | Huperzia stemmermanniae | Lycopodiaceae
|
| PHTA4 | Phlegmariurus taxifolius (Sw.) A.& D. Löve | Huperzia taxifolia | Lycopodiaceae
|
| PHALC2 | Phleum alpinum L. var. commutatum (Gaudin) Griseb. | Phleum alpinum | Poaceae
|
| PHAL2 | Phleum alpinum L. | alpine timothy | Poaceae
|
| PHAR4 | Phleum arenarium L. | sand timothy | Poaceae
|
| PHBE5 | Phleum bellardii Willd. | Phleum subulatum | Poaceae
|
| PHBE4 | Phleum bertolonii DC. | diploid timothy | Poaceae
|
| PHCOA | Phleum commutatum Gaudin var. americanum (Fourn.) Hultén | Phleum alpinum | Poaceae
|
| PHCO9 | Phleum commutatum Gaudin | Phleum alpinum | Poaceae
|
| PHIN29 | Phleum indicum Houtt. | Ischaemum indicum | Poaceae
|
| PHNO4 | Phleum nodosum L. | Phleum pratense | Poaceae
|
| PHPA8 | Phleum paniculatum Huds. | British timothy | Poaceae
|
| PHPRN2 | Phleum pratense L. ssp. nodosum (L.) Arcang. | Phleum pratense | Poaceae
|
| PHPRN | Phleum pratense L. var. nodosum (L.) Huds. | Phleum pratense | Poaceae
|
| PHPR3 | Phleum pratense L. | timothy | Poaceae
|
| PHSU2 | Phleum subulatum (Savi) Aschers. & Graebn. | Italian timothy | Poaceae
|
| PHLEU | Phleum L. | timothy | Poaceae
|
| PHAU12 | Phlomis aurea Decne. | Sinai Jerusalem sage | Lamiaceae
|
| PHFR4 | Phlomis fruticosa L. | shrubby Jerusalem sage | Lamiaceae
|
| PHTU2 | Phlomis tuberosa L. | tuberous Jerusalem sage | Lamiaceae
|
| PHLOM | Phlomis L. | Jerusalem sage | Lamiaceae
|
| PHAC2 | Phlox aculeata A. Nels. | sagebrush phlox | Polemoniaceae
|
| PHAD2 | Phlox adsurgens Torr. ex Gray | northern phlox | Polemoniaceae
|
| PHAL12 | Phlox alaskensis Jordal | Phlox richardsonii ssp. alaskensis | Polemoniaceae
|
| PHALA3 | Phlox albomarginata M.E. Jones ssp. albomarginata | whitemargin phlox | Polemoniaceae
|
| PHALD | Phlox albomarginata M.E. Jones ssp. diapensioides (Rydb.) Wherry | whitemargin phlox | Polemoniaceae
|
| PHALM | Phlox albomarginata M.E. Jones ssp. minor (M.E. Jones) Wherry | Phlox albomarginata ssp. albomarginata | Polemoniaceae
|
| PHALV | Phlox albomarginata M.E. Jones ssp. vera Wherry | Phlox albomarginata ssp. albomarginata | Polemoniaceae
|
| PHAL8 | Phlox albomarginata M.E. Jones | whitemargin phlox | Polemoniaceae
|
| PHALA4 | Phlox alyssifolia Greene ssp. abdita (A. Nels.) Wherry | alyssumleaf phlox | Polemoniaceae
|
| PHALA5 | Phlox alyssifolia Greene ssp. alyssifolia | alyssumleaf phlox | Polemoniaceae
|
| PHALC | Phlox alyssifolia Greene ssp. collina (Rydb.) Wherry | alyssumleaf phlox | Polemoniaceae
|
| PHALV2 | Phlox alyssifolia Greene ssp. vera Wherry | Phlox alyssifolia ssp. alyssifolia | Polemoniaceae
|
| PHAL3 | Phlox alyssifolia Greene | alyssumleaf phlox | Polemoniaceae
|
| PHAM6 | Phlox amabilis Brand | Arizona phlox | Polemoniaceae
|
| PHAMA2 | Phlox amoena Sims ssp. amoena | hairy phlox | Polemoniaceae
|
| PHAML | Phlox amoena Sims ssp. lighthipei (Small) Wherry | Lighthipe's phlox | Polemoniaceae
|
| PHAM3 | Phlox amoena Sims | hairy phlox | Polemoniaceae
|
| PHAM7 | Phlox amplifolia Britt. | largeleaf phlox | Polemoniaceae
|
| PHANA | Phlox andicola E. Nels. ssp. andicola | prairie phlox | Polemoniaceae
|
| PHANP2 | Phlox andicola E. Nels. ssp. parvula Wherry | prairie phlox | Polemoniaceae
|
| PHANP3 | Phlox andicola E. Nels. ssp. planitiarum (A. Nels.) Wherry | Phlox andicola ssp. andicola | Polemoniaceae
|
| PHANT | Phlox andicola E. Nels. ssp. typica Wherry | Phlox andicola ssp. andicola | Polemoniaceae
|
| PHAN4 | Phlox andicola E. Nels. | prairie phlox | Polemoniaceae
|
| PHAR7 | Phlox argillacea Clute & Ferris | Phlox pilosa ssp. pilosa | Polemoniaceae
|
| PHAUA3 | Phlox austromontana Coville ssp. austromontana | mountain phlox | Polemoniaceae
|
| PHAUD | Phlox austromontana Coville ssp. densa (Brand) Wherry | dense mountain phlox | Polemoniaceae
|
| PHAUP | Phlox austromontana Coville ssp. prostrata (E. Nels.) Wherry | prostrate mountain phlox | Polemoniaceae
|
| PHAUV | Phlox austromontana Coville ssp. vera Wherry | Phlox austromontana ssp. austromontana | Polemoniaceae
|
| PHAUJ | Phlox austromontana Coville var. jonesii (Wherry) Welsh | Phlox jonesii | Polemoniaceae
|
| PHAUL2 | Phlox austromontana Coville var. lutescens Welsh | Phlox austromontana ssp. austromontana | Polemoniaceae
|
| PHAUP2 | Phlox austromontana Coville var. prostrata E. Nels. | Phlox austromontana ssp. prostrata | Polemoniaceae
|
| PHAU3 | Phlox austromontana Coville | mountain phlox | Polemoniaceae
|
| PHAZ | Phlox azurea G.L. Smith | Phlox diffusa ssp. diffusa | Polemoniaceae
|
| PHBIA | Phlox bifida Beck ssp. arkansana Marsh. p.p. | Phlox bifida ssp. bifida | Polemoniaceae
|
| PHBIB | Phlox bifida Beck ssp. bifida | cleft phlox | Polemoniaceae
|
| PHBIS | Phlox bifida Beck ssp. stellaria (Gray) Wherry | cleft phlox | Polemoniaceae
|
| PHBIC | Phlox bifida Beck var. cedaria (Brand) Fern. | Phlox bifida ssp. stellaria | Polemoniaceae
|
| PHBIG | Phlox bifida Beck var. glandifera Wherry | Phlox bifida ssp. bifida | Polemoniaceae
|
| PHBII | Phlox bifida Beck var. induta Shinners | Phlox oklahomensis | Polemoniaceae
|
| PHBIS2 | Phlox bifida Beck var. stellaria (Gray) Wherry | Phlox bifida ssp. stellaria | Polemoniaceae
|
| PHBI3 | Phlox bifida Beck | cleft phlox | Polemoniaceae
|
| PHBO6 | Phlox borealis Wherry | Phlox sibirica ssp. borealis | Polemoniaceae
|
| PHBR12 | Phlox brittonii Small | Phlox subulata ssp. brittonii | Polemoniaceae
|
| PHBR11 | Phlox bryoides Nutt. | Phlox hoodii ssp. muscoides | Polemoniaceae
|
| PHBU | Phlox buckleyi Wherry | swordleaf phlox | Polemoniaceae
|
| PHCAC4 | Phlox caespitosa Nutt. ssp. condensata (Gray) Wherry | Phlox condensata | Polemoniaceae
|
| PHCAE | Phlox caespitosa Nutt. ssp. eucaespitosa Brand | Phlox caespitosa | Polemoniaceae
|
| PHCAP | Phlox caespitosa Nutt. ssp. platyphylla Wherry | Phlox pulvinata | Polemoniaceae
|
| PHCAP2 | Phlox caespitosa Nutt. ssp. pulvinata Wherry | Phlox pulvinata | Polemoniaceae
|
| PHCA7 | Phlox caespitosa Nutt. | tufted phlox | Polemoniaceae
|
| PHCA24 | Phlox canescens Torr. & Gray | Phlox hoodii ssp. canescens | Polemoniaceae
|
| PHCAA | Phlox carolina L. ssp. alta Wherry | thickleaf phlox | Polemoniaceae
|
| PHCAA2 | Phlox carolina L. ssp. angusta Wherry | thickleaf phlox | Polemoniaceae
|
| PHCAC3 | Phlox carolina L. ssp. carolina | thickleaf phlox | Polemoniaceae
|
| PHCAT | Phlox carolina L. ssp. turritella Wherry | thickleaf phlox | Polemoniaceae
|
| PHCAA3 | Phlox carolina L. var. angusta (Wherry) Steyermark | Phlox carolina ssp. angusta | Polemoniaceae
|
| PHCAT2 | Phlox carolina L. var. triflora (Michx.) Steyermark | Phlox glaberrima ssp. triflora | Polemoniaceae
|
| PHCA19 | Phlox carolina L. | thickleaf phlox | Polemoniaceae
|
| PHCA14 | Phlox caryophylla Wherry | clove phlox | Polemoniaceae
|
| PHCL | Phlox cluteana A. Nels. | Navajo Mountain phlox | Polemoniaceae
|
| PHCO10 | Phlox colubrina Wherry & Constance | Snake River phlox | Polemoniaceae
|
| PHCO11 | Phlox condensata (Gray) E. Nels. | dwarf phlox | Polemoniaceae
|
| PHCO12 | Phlox covillei E. Nels. | Coville's phlox | Polemoniaceae
|