| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| GRIMM2 | Grimmia Hedw. | grimmia dry rock moss | Grimmiaceae
|
| GRAC | Grindelia acutifolia Steyermark | sharpleaf gumweed | Asteraceae
|
| GRAD2 | Grindelia adenodonta (Steyermark) Nesom | Lonestar gumweed | Asteraceae
|
| GRAP | Grindelia aphanactis Rydb. | Grindelia nuda var. aphanactis | Asteraceae
|
| GRAR4 | Grindelia arenicola Steyermark | Grindelia stricta var. stricta | Asteraceae
|
| GRARA | Grindelia arizonica Gray var. arizonica | Arizona gumweed | Asteraceae
|
| GRARD | Grindelia arizonica Gray var. dentata Steyermark | Grindelia arizonica var. arizonica | Asteraceae
|
| GRARM | Grindelia arizonica Gray var. microphylla Steyermark | Grindelia arizonica var. arizonica | Asteraceae
|
| GRARN | Grindelia arizonica Gray var. neomexicana (Woot. & Standl.) Nesom | New Mexican gumweed | Asteraceae
|
| GRARS | Grindelia arizonica Gray var. stenophylla Steyermark | Arizona gumweed | Asteraceae
|
| GRAR2 | Grindelia arizonica Gray | Arizona gumweed | Asteraceae
|
| GRCAB | Grindelia camporum Greene var. bracteosa (J.T. Howell) M.A. Lane | bract gumweed | Asteraceae
|
| GRCAC | Grindelia camporum Greene var. camporum | Great Valley gumweed | Asteraceae
|
| GRCAP | Grindelia camporum Greene var. parviflora Steyermark | Grindelia camporum var. camporum | Asteraceae
|
| GRCA | Grindelia camporum Greene | Great Valley gumweed | Asteraceae
|
| GRCO | Grindelia columbiana (Piper) Rydb. | Columbia River gumweed | Asteraceae
|
| GRDED | Grindelia decumbens Greene var. decumbens | reclined gumweed | Asteraceae
|
| GRDES | Grindelia decumbens Greene var. subincisa (Greene) Steyermark | reclined gumweed | Asteraceae
|
| GRDE | Grindelia decumbens Greene | reclined gumweed | Asteraceae
|
| GRFA | Grindelia fastigiata Greene | pointed gumweed | Asteraceae
|
| GRFR | Grindelia fraxinopratensis Reveal & Beatley | Ash Meadows gumweed | Asteraceae
|
| GRGR | Grindelia grandiflora Hook. | manyray gumweed | Asteraceae
|
| GRGY | Grindelia gymnospermoides (Gray) Ruffin | Xanthocephalum gymnospermoides | Asteraceae
|
| GRHA | Grindelia hallii Steyermark ex Rothrock | Grindelia hirsutula var. hallii | Asteraceae
|
| GRHA2 | Grindelia havardii Steyermark | Havard's gumweed | Asteraceae
|
| GRHIR | Grindelia hirsutula Hook. & Arn. ssp. rubricaulis (DC.) Keck | Grindelia hirsutula var. hirsutula | Asteraceae
|
| GRHID2 | Grindelia hirsutula Hook. & Arn. var. davyi (Jepson) M.A. Lane | hairy gumweed | Asteraceae
|
| GRHIH2 | Grindelia hirsutula Hook. & Arn. var. hallii (Steyermark ex Rothrock) M.A. Lane | Hall's gumweed | Asteraceae
|
| GRHIH3 | Grindelia hirsutula Hook. & Arn. var. hirsutula | hairy gumweed | Asteraceae
|
| GRHIM | Grindelia hirsutula Hook. & Arn. var. maritima (Greene) M.A. Lane | coastal gumweed | Asteraceae
|
| GRHI | Grindelia hirsutula Hook. & Arn. | hairy gumweed | Asteraceae
|
| GRHO | Grindelia howellii Steyermark | Howell's gumweed | Asteraceae
|
| GRHU | Grindelia humilis Hook. & Arn. | Grindelia hirsutula var. hirsutula | Asteraceae
|
| GRINA | Grindelia inornata Greene var. angusta Steyermark | Colorado gumweed | Asteraceae
|
| GRINI | Grindelia inornata Greene var. inornata | Colorado gumweed | Asteraceae
|
| GRIN2 | Grindelia inornata Greene | Colorado gumweed | Asteraceae
|
| GRINM | Grindelia integrifolia DC. var. macrophylla (Greene) Cronq. | Grindelia stricta var. stricta | Asteraceae
|
| GRIN | Grindelia integrifolia DC. | Puget Sound gumweed | Asteraceae
|
| GRLA | Grindelia laciniata Rydb. | cutleaf gumweed | Asteraceae
|
| GRLAL | Grindelia lanceolata Nutt. var. lanceolata | narrowleaf gumweed | Asteraceae
|
| GRLAT | Grindelia lanceolata Nutt. var. texana (Scheele) Shinners | Texan gumweed | Asteraceae
|
| GRLA3 | Grindelia lanceolata Nutt. | narrowleaf gumweed | Asteraceae
|
| GRLAP | Grindelia latifolia Kellogg ssp. platyphylla (Greene) Keck | Grindelia stricta var. platyphylla | Asteraceae
|
| GRLAP2 | Grindelia latifolia Kellogg var. platyphylla Greene | Grindelia stricta var. platyphylla | Asteraceae
|
| GRLA6 | Grindelia latifolia Kellogg p.p. | Grindelia stricta var. platyphylla | Asteraceae
|
| GRLI3 | Grindelia littoralis Steyermark | Grindelia lanceolata var. lanceolata | Asteraceae
|
| GRMA | Grindelia maritima (Greene) Steyermark | Grindelia hirsutula var. maritima | Asteraceae
|
| GRMIA | Grindelia microcephala DC. var. adenodonta Steyermark | Grindelia adenodonta | Asteraceae
|
| GRMIP | Grindelia microcephala DC. var. pusilla Steyermark | Grindelia pusilla | Asteraceae
|
| GRMI | Grindelia microcephala DC. | littlehead gumweed | Asteraceae
|
| GRNAC | Grindelia nana Nutt. ssp. columbiana Piper | Grindelia columbiana | Asteraceae
|
| GRNAD | Grindelia nana Nutt. var. discoidea (Nutt.) Gray | Grindelia columbiana | Asteraceae
|
| GRNAI | Grindelia nana Nutt. var. integerrima (Rydb.) Steyermark | Idaho gumweed | Asteraceae
|
| GRNAI2 | Grindelia nana Nutt. var. integrifolia Nutt. | Grindelia nana var. nana | Asteraceae
|
| GRNAN | Grindelia nana Nutt. var. nana | Idaho gumweed | Asteraceae
|
| GRNA | Grindelia nana Nutt. | Idaho gumweed | Asteraceae
|
| GRNE2 | Grindelia neomexicana Woot. & Standl. | Grindelia arizonica var. neomexicana | Asteraceae
|
| GRNUA | Grindelia nuda Wood var. aphanactis (Rydb.) Nesom | curlytop gumweed | Asteraceae
|
| GRNUN | Grindelia nuda Wood var. nuda | curlytop gumweed | Asteraceae
|
| GRNU | Grindelia nuda Wood | curlytop gumweed | Asteraceae
|
| GROO | Grindelia oolepis Blake | plains gumweed | Asteraceae
|
| GROX | Grindelia oxylepis Greene | Mexican gumweed | Asteraceae
|
| GRPA | Grindelia paludosa Greene | Grindelia camporum var. camporum | Asteraceae
|
| GRPA8 | Grindelia papposa Nesom & Suh | Spanish gold | Asteraceae
|
| GRPE2 | Grindelia perennis A. Nels. | Grindelia squarrosa var. quasiperennis | Asteraceae
|
| GRPR | Grindelia procera Greene | Grindelia camporum var. camporum | Asteraceae
|
| GRPU2 | Grindelia pusilla (Steyermark) Nesom | little gumweed | Asteraceae
|
| GRRE | Grindelia revoluta Steyermark | rolled gumweed | Asteraceae
|
| GRROA | Grindelia robusta Nutt. var. angustifolia Gray | Grindelia stricta var. angustifolia | Asteraceae
|
| GRROB | Grindelia robusta Nutt. var. bracteosa (J.T. Howell) Keck | Grindelia camporum var. bracteosa | Asteraceae
|
| GRRO2 | Grindelia robusta Nutt. p.p. | Grindelia camporum var. camporum | Asteraceae
|
| GRSCN | Grindelia scabra Greene var. neomexicana (Woot. & Standl.) Steyermark | Grindelia arizonica var. neomexicana | Asteraceae
|
| GRSC | Grindelia scabra Greene | rough gumweed | Asteraceae
|
| GRSE4 | Grindelia serrulata Rydb. | Grindelia squarrosa var. serrulata | Asteraceae
|
| GRSQI | Grindelia squarrosa (Pursh) Dunal var. integrifolia (Nutt.) Boivin | Grindelia nana var. nana | Asteraceae
|
| GRSQN | Grindelia squarrosa (Pursh) Dunal var. nuda (Wood) Gray | Grindelia nuda var. nuda | Asteraceae
|
| GRSQQ | Grindelia squarrosa (Pursh) Dunal var. quasiperennis Lunell | curlycup gumweed | Asteraceae
|
| GRSQS | Grindelia squarrosa (Pursh) Dunal var. serrulata (Rydb.) Steyermark | curlycup gumweed | Asteraceae
|
| GRSQS2 | Grindelia squarrosa (Pursh) Dunal var. squarrosa | curlycup gumweed | Asteraceae
|
| GRSQ | Grindelia squarrosa (Pursh) Dunal | curlycup gumweed | Asteraceae
|
| GRSTB | Grindelia stricta DC. ssp. blakei (Steyermark) Keck | Grindelia stricta var. stricta | Asteraceae
|
| GRSTV | Grindelia stricta DC. ssp. venulosa (Jepson) Keck | Grindelia stricta var. platyphylla | Asteraceae
|
| GRSTA2 | Grindelia stricta DC. var. angustifolia (Gray) M.A. Lane | Oregon gumweed | Asteraceae
|
| GRSTP2 | Grindelia stricta DC. var. platyphylla (Greene) M.A. Lane | Oregon gumweed | Asteraceae
|
| GRSTS2 | Grindelia stricta DC. var. stricta | Oregon gumweed | Asteraceae
|
| GRST3 | Grindelia stricta DC. | Oregon gumweed | Asteraceae
|
| GRST2 | Grindelia stylosa Eastw. | Vanclevea stylosa | Asteraceae
|
| GRSUE | Grindelia subalpina Greene var. erecta (A. Nels.) Steyermark | subalpine gumweed | Asteraceae
|
| GRSUS | Grindelia subalpina Greene var. subalpina | subalpine gumweed | Asteraceae
|
| GRSU | Grindelia subalpina Greene | subalpine gumweed | Asteraceae
|
| GRTEL | Grindelia texana Scheele var. lanceolata (Nutt.) Shinners | Grindelia lanceolata var. lanceolata | Asteraceae
|
| GRTE8 | Grindelia texana Scheele | Grindelia lanceolata var. texana | Asteraceae
|
| GRIND | Grindelia Willd. | gumweed | Asteraceae
|
| GRAM | Grossularia amara (McClatchie) Coville & Britt. | Ribes amarum | Grossulariaceae
|
| GRBI | Grossularia binominata (Heller) Coville & Britt. | Ribes binominatum | Grossulariaceae
|
| GRCA4 | Grossularia californica (Hook. & Arn.) Coville & Britt. | Ribes californicum var. californicum | Grossulariaceae
|
| GRCA5 | Grossularia campestris Small | Ribes curvatum | Grossulariaceae
|
| GRCO3 | Grossularia cognata (Greene) Coville & Britt. | Ribes oxyacanthoides ssp. cognatum | Grossulariaceae
|
| GRCR | Grossularia cruenta (Greene) Coville & Britt. | Ribes cruentum var. cruentum | Grossulariaceae
|
| GRCU2 | Grossularia curvata (Small) Coville & Britt. | Ribes curvatum | Grossulariaceae
|
| GRCY | Grossularia cynosbati (L.) P. Mill. | Ribes cynosbati | Grossulariaceae
|