| Lateinischer name | Allgemeiner name | Familie | ||
| Opuntia ×tetracantha Toumey (pro sp.) | >>Cylindropuntia ×tetracantha |
Cactaceae |
||
| Opuntia ×vaseyi (Coult.) Britt. & Rose [littoralis × phaeacantha] | Vasey s coastal pricklypear |
Cactaceae |
||
| Opuntia ×viridiflora Britt. & Rose (pro sp.) | >>Cylindropuntia ×viridiflora |
Cactaceae |
||
| Opuntia ×vivipara Rose (pro sp.) | >>Cylindropuntia ×vivipara |
Cactaceae |
||
| Opuntia ×wootonii Griffiths [engelmannii × phaeacantha] | Wooton s pricklypear |
Cactaceae |
||
| Orbexilum gracile (Torr. & Gray) Rydb. | >>Orbexilum pedunculatum var. psoralioides |
Fabaceae |
||
| Orbexilum lupinellum (Michx.) Isely | piedmont leather-root |
Fabaceae |
||
| Orbexilum macrophyllum (Rowlee) Rydb. | largeleaf leather-root |
Fabaceae |
||
| Orbexilum onobrychis (Nutt.) Rydb. | French-grass |
Fabaceae |
||
| Orbexilum pedunculatum (P. Mill.) Rydb. | Sampson s snakeroot |
Fabaceae |
||
| Orbexilum pedunculatum (P. Mill.) Rydb. var. eglandulosum (Ell.) Isely | >>Orbexilum pedunculatum var. pedunculatum |
Fabaceae |
||
| Orbexilum pedunculatum (P. Mill.) Rydb. var. gracile (Torr. & Gray) J. Grimes | >>Orbexilum pedunculatum var. psoralioides |
Fabaceae |
||
| Orbexilum pedunculatum (P. Mill.) Rydb. var. pedunculatum | Sampson s snakeroot |
Fabaceae |
||
| Orbexilum pedunculatum (P. Mill.) Rydb. var. psoralioides (Walt.) Isely | Sampson s snakeroot |
Fabaceae |
||
| Orbexilum Raf. | leather-root |
Fabaceae |
||
| Orbexilum simplex (Nutt. ex Torr. & Gray) Rydb. | singlestem leather-root |
Fabaceae |
||
| Orbexilum stipulatum (Torr. & Gray) Rydb. | largestipule leather-root |
Fabaceae |
||
| Orbexilum virgatum (Nutt.) Rydb. | pineland leather-root |
Fabaceae |
||
| Orbignya barbosiana Burret | babassu |
Arecaceae |
||
| Orbignya C. Martius ex Endl. | orbignya |
Arecaceae |
||
| Orbignya cohune (C. Martius) Dahlgren ex Standley | Cohune palm |
Arecaceae |
||
| Orbignya speciosa (C. Martius) Barb. Rodr. | >>Orbignya barbosiana |
Arecaceae |
||
| Orchis aristata Fisch. ex Lindl. | >>Dactylorhiza aristata var. aristata |
Orchidaceae |
||
| Orchis L. | orchis |
Orchidaceae |
||
| Orchis morio L. | green-winged orchid |
Orchidaceae |
||
| Orchis purpurella T.& T.A. Steph. [excluded] | Orchidaceae |
|||
| Orchis rotundifolia Banks ex Pursh | >>Amerorchis rotundifolia |
Orchidaceae |
||
| Orchis rotundifolia Banks ex Pursh var. lineata Mousley | >>Amerorchis rotundifolia |
Orchidaceae |
||
| Orchis spectabilis L. | >>Galearis spectabilis |
Orchidaceae |
||
| Orcuttia californica Vasey | California Orcutt grass |
Poaceae |
||
| Orcuttia californica Vasey var. inaequalis (Hoover) Hoover | >>Orcuttia inaequalis |
Poaceae |
||
| Orcuttia californica Vasey var. viscida Hoover | >>Orcuttia viscida |
Poaceae |
||
| Orcuttia greenei Vasey | >>Tuctoria greenei |
Poaceae |
||
| Orcuttia inaequalis Hoover | San Joaquin Valley Orcutt grass |
Poaceae |
||
| Orcuttia mucronata Crampton | >>Tuctoria mucronata |
Poaceae |
||
| Orcuttia pilosa Hoover | hairy Orcutt grass |
Poaceae |
||
| Orcuttia tenuis A.S. Hitchc. | slender Orcutt grass |
Poaceae |
||
| Orcuttia Vasey | Orcutt grass |
Poaceae |
||
| Orcuttia viscida (Hoover) J. Reeder | Sacramento Orcutt grass |
Poaceae |
||
| Oreastrum elatum Greene | >>Oreostemma elatum |
Asteraceae |
||
| Oreobatus deliciosus (Torr.) James | >>Rubus deliciosus |
Rosaceae |
||
| Oreobatus deliciosus (Torr.) James ssp. neomexicanus (Gray) W.A. Weber | >>Rubus neomexicanus |
Rosaceae |
||
| Oreobolus furcatus Mann | Hawai i Island sedge |
Cyperaceae |
||
| Oreobolus R. Br. | oreobolus |
Cyperaceae |
||
| Oreobroma heckneri Morton | >>Lewisia cotyledon var. heckneri |
Portulacaceae |
||
| Oreobroma longipetalum Piper | >>Lewisia longipetala |
Portulacaceae |
||
| Oreobroma nevadense (Gray) T.J. Howell | >>Lewisia nevadensis |
Portulacaceae |
||
| Oreobroma pygmaeum (Gray) T.J. Howell | >>Lewisia pygmaea |
Portulacaceae |
||
| Oreocarya abortiva Greene | >>Cryptantha cinerea var. abortiva |
Boraginaceae |
||
| Oreocarya aperta Eastw. | >>Cryptantha aperta |
Boraginaceae |
||
| Oreocarya bakeri Greene | >>Cryptantha bakeri |
Boraginaceae |
||
| Oreocarya breviflora Osterhout | >>Cryptantha breviflora |
Boraginaceae |
||
| Oreocarya caespitosa A. Nels. | >>Cryptantha caespitosa |
Boraginaceae |
||
| Oreocarya cana A. Nels. | >>Cryptantha cana |
Boraginaceae |
||
| Oreocarya celosioides Eastw. | >>Cryptantha celosioides |
Boraginaceae |
||
| Oreocarya confertiflora Greene | >>Cryptantha confertiflora |
Boraginaceae |
||
| Oreocarya crymophila (I.M. Johnston) Jepson & Hoover | >>Cryptantha crymophila |
Boraginaceae |
||
| Oreocarya elata Eastw. | >>Cryptantha elata |
Boraginaceae |
||
| Oreocarya flava A. Nels. | >>Cryptantha flava |
Boraginaceae |
||
| Oreocarya flavoculata A. Nels. | >>Cryptantha flavoculata |
Boraginaceae |
||
| Oreocarya fulvocanescens (S. Wats.) Greene | >>Cryptantha fulvocanescens var. fulvocanescens |
Boraginaceae |
||
| Oreocarya glomerata (Pursh) Greene, non Lehm. ex Fisch. | >>Cryptantha celosioides |
Boraginaceae |
||
| Oreocarya hoffmannii (I.M. Johnston) Abrams | >>Cryptantha hoffmannii |
Boraginaceae |
||
| Oreocarya humilis (Gray) Greene | >>Cryptantha humilis |
Boraginaceae |
||
| Oreocarya humilis (Gray) Greene ssp. nana (Eastw.) W.A. Weber | >>Cryptantha humilis |
Boraginaceae |
||
| Oreocarya leucophaea (Dougl. ex Lehm.) Greene | >>Cryptantha leucophaea |
Boraginaceae |
||
| Oreocarya longiflora A. Nels. | >>Cryptantha longiflora |
Boraginaceae |
||
| Oreocarya macounii Eastw. | >>Cryptantha celosioides |
Boraginaceae |
||
| Oreocarya mensana M.E. Jones | >>Cryptantha mensana |
Boraginaceae |
||
| Oreocarya nitida Greene | >>Cryptantha fulvocanescens var. nitida |
Boraginaceae |
||
| Oreocarya nubigena Greene | >>Cryptantha nubigena |
Boraginaceae |
||
| Oreocarya osterhoutii Payson | >>Cryptantha osterhoutii |
Boraginaceae |
||
| Oreocarya paradoxa A. Nels. | >>Cryptantha paradoxa |
Boraginaceae |
||
| Oreocarya propria A. Nels. & J.F. Macbr. | >>Cryptantha propria |
Boraginaceae |
||
| Oreocarya pustulosa Rydb. | >>Cryptantha cinerea var. pustulosa |
Boraginaceae |