| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| OUIL | Ouratea ilicifolia (DC.) Baill. | chicharron amarillo | Ochnaceae
|
| OULI | Ouratea littoralis Urban | abey amarillo | Ochnaceae
|
| OUST | Ouratea striata (v. Tiegh.) Urban | guanabanilla | Ochnaceae
|
| OURAT | Ouratea Aubl. | ouratea | Ochnaceae
|
| OXACM | Oxalis acetosella L. ssp. montana (Raf.) Hult�n ex D. L�ve | Oxalis montana | Oxalidaceae
|
| OXACO | Oxalis acetosella L. ssp. oregana (Nutt.) D. L�ve | Oxalis oregana | Oxalidaceae
|
| OXACR | Oxalis acetosella L. var. rhodantha (Fern.) R. Knuth | Oxalis montana | Oxalidaceae
|
| OXAC3 | Oxalis acetosella auct. non L. | Oxalis montana | Oxalidaceae
|
| OXALA | Oxalis albicans Kunth ssp. albicans | radishroot woodsorrel | Oxalidaceae
|
| OXALC | Oxalis albicans Kunth ssp. californica (Abrams) Eiten | California woodsorrel | Oxalidaceae
|
| OXALP | Oxalis albicans Kunth ssp. pilosa (Nutt.) Eiten | radishroot woodsorrel | Oxalidaceae
|
| OXAL | Oxalis albicans Kunth | radishroot woodsorrel | Oxalidaceae
|
| OXAL2 | Oxalis alpina (Rose) Rose ex R. Knuth | alpine woodsorrel | Oxalidaceae
|
| OXAM2 | Oxalis amplifolia auct. non (Trel.) R. Knuth | Oxalis drummondii | Oxalidaceae
|
| OXAN2 | Oxalis angustifolia Kunth | Oxalis frutescens ssp. angustifolia | Oxalidaceae
|
| OXARR | Oxalis articulata Savigny ssp. rubra (St.-Hil.) Lourteig | Oxalis rubra | Oxalidaceae
|
| OXBA | Oxalis barrelieri L. | Barrelier's woodsorrel | Oxalidaceae
|
| OXBE3 | Oxalis berlandieri Torr. | Oxalis frutescens ssp. angustifolia | Oxalidaceae
|
| OXBO3 | Oxalis bowiei Lindl. | | Oxalidaceae
|
| OXBR | Oxalis brittoniae Small | Oxalis stricta | Oxalidaceae
|
| OXBU | Oxalis bushii (Small) Small | Oxalis stricta | Oxalidaceae
|
| OXCA5 | Oxalis caerulea (Small) R. Knuth | blue woodsorrel | Oxalidaceae
|
| OXCA8 | Oxalis caespitosa Raf. | Oxalis priceae ssp. priceae | Oxalidaceae
|
| OXCAS | Oxalis californica (Abrams) R. Knuth var. subglabra Wieg. | Oxalis albicans ssp. albicans | Oxalidaceae
|
| OXCA | Oxalis californica (Abrams) R. Knuth | Oxalis albicans ssp. californica | Oxalidaceae
|
| OXCE | Oxalis cernua Thunb. | Oxalis pes-caprae | Oxalidaceae
|
| OXCE2 | Oxalis cespitosa Raf. [orthographic variant] | Oxalis priceae ssp. priceae | Oxalidaceae
|
| OXCO8 | Oxalis coloradensis Rydb. | Oxalis stricta | Oxalidaceae
|
| OXCO11 | Oxalis colorea (Small) Fedde | Oxalis priceae ssp. colorea | Oxalidaceae
|
| OXCOA2 | Oxalis corniculata L. ssp. albicans (Kunth) Lourteig | Oxalis albicans ssp. albicans | Oxalidaceae
|
| OXCOP | Oxalis corniculata L. ssp. pilosa (Nutt.) Lourteig | Oxalis albicans ssp. pilosa | Oxalidaceae
|
| OXCOA | Oxalis corniculata L. var. atropurpurea Planch. | Oxalis corniculata | Oxalidaceae
|
| OXCOD | Oxalis corniculata L. var. dillenii (Jacq.) Trel. | Oxalis stricta | Oxalidaceae
|
| OXCOL2 | Oxalis corniculata L. var. langloisii (Small) Wieg. | Oxalis corniculata | Oxalidaceae
|
| OXCOL | Oxalis corniculata L. var. lupulina (R. Knuth) Zucc. | Oxalis corniculata | Oxalidaceae
|
| OXCOL3 | Oxalis corniculata L. var. lyonii (Pursh) Zucc. | Oxalis priceae ssp. texana | Oxalidaceae
|
| OXCOM2 | Oxalis corniculata L. var. macrantha auct. non Trel. | Oxalis suksdorfii | Oxalidaceae
|
| OXCOM | Oxalis corniculata L. var. macrophylla Arsene ex R. Knuth | Oxalis corniculata | Oxalidaceae
|
| OXCOM3 | Oxalis corniculata L. var. minor Laing | Oxalis corniculata | Oxalidaceae
|
| OXCOP2 | Oxalis corniculata L. var. pilosa (Nutt.) B.L. Turner | Oxalis albicans ssp. pilosa | Oxalidaceae
|
| OXCOR | Oxalis corniculata L. var. reptans Laing | Oxalis corniculata | Oxalidaceae
|
| OXCOS | Oxalis corniculata L. var. sericea Kunth | Oxalis radicosa | Oxalidaceae
|
| OXCOV | Oxalis corniculata L. var. villosa (Bieb.) Hohen. | Oxalis corniculata | Oxalidaceae
|
| OXCOV2 | Oxalis corniculata L. var. viscidula Wieg. | Oxalis corniculata | Oxalidaceae
|
| OXCOW | Oxalis corniculata L. var. wrightii (Gray) B.L. Turner | Oxalis albicans ssp. albicans | Oxalidaceae
|
| OXCO | Oxalis corniculata L. | creeping woodsorrel | Oxalidaceae
|
| OXCO9 | Oxalis corymbosa DC. | Oxalis debilis var. corymbosa | Oxalidaceae
|
| OXCY | Oxalis cymosa Small | Oxalis stricta | Oxalidaceae
|
| OXDEC | Oxalis debilis Kunth var. corymbosa (DC.) Lourteig | pink woodsorrel | Oxalidaceae
|
| OXDE3 | Oxalis debilis Kunth | pink woodsorrel | Oxalidaceae
|
| OXDE4 | Oxalis decaphylla Kunth | tenleaf woodsorrel | Oxalidaceae
|
| OXDI | Oxalis dichondrifolia Gray | peonyleaf woodsorrel | Oxalidaceae
|
| OXDIF | Oxalis dillenii Jacq. ssp. filipes (Small) Eiten | Oxalis stricta | Oxalidaceae
|
| OXDIR3 | Oxalis dillenii Jacq. var. radicans Shinners | Oxalis stricta | Oxalidaceae
|
| OXDIR2 | Oxalis dillenii Jacq. var. recurva (Ell.) C.F. Reed | Oxalis priceae ssp. colorea | Oxalidaceae
|
| OXDI2 | Oxalis dillenii Jacq. | Oxalis stricta | Oxalidaceae
|
| OXDO | Oxalis domingensis Urban | Oxalis rugeliana | Oxalidaceae
|
| OXDR | Oxalis drummondii Gray | Drummond's woodsorrel | Oxalidaceae
|
| OXEG | Oxalis eggersii Urban | Eggers' woodsorrel | Oxalidaceae
|
| OXEUB2 | Oxalis europaea Jord. var. bushii (Small) Wieg. | Oxalis stricta | Oxalidaceae
|
| OXEUR | Oxalis europaea Jord. var. rufa (Small) Young | Oxalis stricta | Oxalidaceae
|
| OXEU2 | Oxalis europaea Jord. | Oxalis stricta | Oxalidaceae
|
| OXFI2 | Oxalis filipes Small | Oxalis stricta | Oxalidaceae
|
| OXFLP | Oxalis florida Salisb. ssp. prostrata (Haw.) Lourteig | Oxalis stricta | Oxalidaceae
|
| OXFLF | Oxalis florida Salisb. var. filipes (Small) Ahles | Oxalis stricta | Oxalidaceae
|
| OXFLR | Oxalis florida Salisb. var. recurva (Ell.) Ahles | Oxalis priceae ssp. colorea | Oxalidaceae
|
| OXFL | Oxalis florida Salisb. | Oxalis stricta | Oxalidaceae
|
| OXFOB | Oxalis fontana Bunge var. bushii (Small) Hara | Oxalis stricta | Oxalidaceae
|
| OXFO | Oxalis fontana Bunge | Oxalis stricta | Oxalidaceae
|
| OXFRA | Oxalis frutescens L. ssp. angustifolia (Kunth) Lourteig | shrubby woodsorrel | Oxalidaceae
|
| OXFR | Oxalis frutescens L. | shrubby woodsorrel | Oxalidaceae
|
| OXGR | Oxalis grandis Small | great yellow woodsorrel | Oxalidaceae
|
| OXGR4 | Oxalis grayi (Rose) R. Knuth | Oxalis decaphylla | Oxalidaceae
|
| OXHI3 | Oxalis hirsuticaulis Small | Oxalis priceae ssp. priceae | Oxalidaceae
|
| OXHI | Oxalis hirta L. | tropical woodsorrel | Oxalidaceae
|
| OXIL | Oxalis illinoensis Schwegm. | Illinois woodsorrel | Oxalidaceae
|
| OXIN | Oxalis incarnata L. | crimson woodsorrel | Oxalidaceae
|
| OXIN5 | Oxalis interior (Small) Fedde | Oxalis stricta | Oxalidaceae
|
| OXIN2 | Oxalis intermedia A. Rich. | West Indian woodsorrel | Oxalidaceae
|
| OXLA9 | Oxalis langloisii (Small) Fedde | Oxalis corniculata | Oxalidaceae
|
| OXLA6 | Oxalis latifolia Kunth | broadleaf woodsorrel | Oxalidaceae
|
| OXLA8 | Oxalis laxa Hook. & Arn. | Oxalis radicosa | Oxalidaceae
|
| OXLY | Oxalis lyonii Pursh | Oxalis priceae ssp. texana | Oxalidaceae
|
| OXMA3 | Oxalis macrantha auct. non (Trel.) Small | Oxalis suksdorfii | Oxalidaceae
|
| OXMA7 | Oxalis macrocarpa (Small) R. Knuth | sorrel | Oxalidaceae
|
| OXMA5 | Oxalis martiana Zucc. | Oxalis latifolia | Oxalidaceae
|
| OXME3 | Oxalis metcalfei (Small) R. Knuth | Oxalis alpina | Oxalidaceae
|
| OXMI2 | Oxalis micrantha Bertero ex Colla | Oxalis radicosa | Oxalidaceae
|
| OXMO | Oxalis montana Raf. | mountain woodsorrel | Oxalidaceae
|
| OXMO3 | Oxalis monticola Small | Oxalis alpina | Oxalidaceae
|
| OXNE | Oxalis nelsonii (Small) R. Knuth | sorrel | Oxalidaceae
|
| OXORS | Oxalis oregana Nutt. var. smallii (R. Knuth) M.E. Peck | Oxalis oregana | Oxalidaceae
|
| OXOR | Oxalis oregana Nutt. | redwood-sorrel | Oxalidaceae
|
| OXPE | Oxalis pes-caprae L. | Bermuda buttercup | Oxalidaceae
|
| OXPIW | Oxalis pilosa Nutt. var. wrightii (Gray) Wieg. | Oxalis albicans ssp. albicans | Oxalidaceae
|
| OXPI2 | Oxalis pilosa Nutt. | Oxalis albicans ssp. pilosa | Oxalidaceae
|
| OXPRC | Oxalis priceae Small ssp. colorea (Small) Eiten | tufted yellow woodsorrel | Oxalidaceae
|
| OXPRP | Oxalis priceae Small ssp. priceae | tufted yellow woodsorrel | Oxalidaceae
|
| OXPRT | Oxalis priceae Small ssp. texana (Small) Eiten | Texas woodsorrel | Oxalidaceae
|
| OXPR | Oxalis priceae Small | tufted yellow woodsorrel | Oxalidaceae
|
| OXPR2 | Oxalis prostrata Haw. | Oxalis stricta | Oxalidaceae
|