Combination search
Looking for commercially available native plant species suitable to your state or region, try the Recommended Species page.
| scientific name | common name(s) | image gallery |
| Oldenlandia uniflora | Clustered Mille Graines | |
| Omphalodes aliena | Mexican Navelwort | |
| Orthocarpus bracteosus | Bracted Owl's Clover Rosy Owl's Clover Rosy Owl's-clover Rosy Owl-clover | |
| Orobanche bulbosa | Chaparral Broomrape | |
| Orobanche californica | California Broom Rape California Broomrape | |
| Orobanche californica ssp. condensa | California Broom Rape California Broomrape | |
| Orobanche californica ssp. californica | California Broom Rape California Broomrape | |
| Orobanche californica ssp. feudgei | California Broom Rape California Broomrape | |
| Orobanche californica ssp. grandis | California Broom Rape California Broomrape | |
| Orobanche californica ssp. grayana | Gray's Broomrape | |
| Orobanche californica ssp. jepsonii | Jepson's Broomrape Jepson's California Broom Rape | |
| Orobanche cooperi | Desert Broomrape Spike Broomrape | |
| Orobanche corymbosa | Flat-top Broomrape Flattop Broomrape | |
| Orobanche corymbosa ssp. corymbosa | Flat-top Broomrape Flattop Broomrape | |
| Orobanche corymbosa ssp. mutabilis | Flat-top Broomrape Flattop Broomrape | |
| Orthocarpus cuspidatus | Siskiyou Mountain Owl-clover Siskiyou Mountain Owlclover Toothed Owl's Clover Toothed Owl's-clover | |
| Orthocarpus cuspidatus ssp. copelandii | Copeland's Owl's Clover Copeland's Owl's-clover Copeland's Owl-clover Copeland's Owlclover | |
| Orthocarpus cuspidatus ssp. cryptanthus | Cryptantha Owl's Clover Cryptantha Owl's-clover Cryptantha Owl-clover Cryptantha Owlclover Short Flowered Owl's Clover | |
| Orthocarpus cuspidatus ssp. cuspidatus | Siskiyou Mountain Owl's Clover Siskiyou Mountain Owl's-clover Siskiyou Mountain Owl-clover Siskiyou Mountain Owlclover | |
| Orobanche fasciculata | Clustered Broomrape Yellow Broomrape | |
| Orthocarpus imbricatus | Mountain Owl's-clover | |
| Orobanche ludoviciana | Louisiana Broomrape | |
| Orobanche ludoviciana ssp. ludoviciana | Louisiana Broomrape Sand Broomrape Suksdorf's Broomrape | |
| Orobanche ludoviciana ssp. multiflora | Manyflower Broomrape | |
| Orobanche multicaulis | Spiked Broomrape | |
| Oryctes nevadensis | Nevada Diggerplant Nevada Oryctes | |
| Orthocarpus pachystachyus | Shasta Owl's Clover Shasta Owl's-clover Shasta Owl-clover Shasta Owlclover | |
| Orobanche parishii | Parish's Broom Rape Parish's Broomrape | |
| Orobanche parishii ssp. brachyloba | Parish's Broom Rape Parish's Broomrape Short Lobed Broom Rape Short-lobed Broomrape | |
| Orobanche parishii ssp. parishii | Parish's Broom Rape Parish's Broomrape | |
| Orobanche pinorum | Conifer Broomrape Pinewoods Broom Rape | |
| Orthocarpus purpureoalbus | Purple-white Owl-clover Purplewhite Owl's Clover Purplewhite Owl's-clover Purplewhite Owlclover | |
| Orobanche riparia | River Broom Rape River Broom-rape River Broomrape | |
| Orthocarpus tenuifolius | Thin-leaf Owl-clover Thin-leaf Owlclover Thin-leaved Owl's Clover Thin-leaved Owl’s-clover Thinleaved Owl's-clover | |
| Orthocarpus tolmiei | Tolmie's Owl's Clover Tolmie's Owl's-clover Tolmie's Owl-clover Tolmie's Owlclover | |
| Orthocarpus tolmiei ssp. holmgreniorum | Noel's Owl's Clover Noel's Owl's-clover Noel's Owl-clover Noel's Owlclover | |
| Orobanche uniflora | One-flowered Broomrape One-flower Cancer Root | |
| Orobanche valida | Rock Creek Broom Rape Rock Creek Broomrape | |
| Orobanche vallicola | Hillside Broomrape Valley Broom Rape | |
| Orobanche valida ssp. howellii | Howell's Broom Rape Howell's Broomrape | |
| Orobanche valida ssp. valida | Rock Creek Broom Rape Rock Creek Broomrape | |
| Oxytheca dendroidea | Narrowleaf Oxytheca Treelike Puncturebract | |
| Oxytheca emarginata | White Margined Oxytheca White-margin Starry Puncturebract Whitemargin Oxytheca | |
| Oxytheca perfoliata | Roundleaf Oxytheca Round-leaf Puncturebract | |
| Oxytheca trilobata | Three Lobed Oxytheca Three-lobed Starry Puncturebract Threelobe Oxytheca Threelobe Starry Puncturebract | |
| Oxytheca watsonii | Watson's Oxytheca Watson's Puncturebract | |
| Palafoxia arida | Desert Palafox Spanish Needle | |
| Palafoxia arida var. arida | Desert Needle Desert Palafox | |
| Palafoxia arida var. gigantea | Giant Spanish Needle | |
| Palafoxia callosa | Small Palafox Small Palafoxia | |
| scientific name | common name(s) | image gallery |
