spreading four o'clock (Mirabilis oxybaphoides) sweet four o'clock (Mirabilis longiflora) Tucson Mountain spiderling (Boerhavia megaptera) white four o'clock (Mirabilis albida) Nymphaeaceae blue water lily (Nymphaea elegans) dotleaf water lily (Nymphaea ampla) Mexican water lily (Nymphaea mexicana) yellow pond lily (Nuphar lutea) Oleaceae Arabian jasmine (Jasminum sambac) caca ravet (Forestiera rhamnifolia) chaparral ash (Fraxinus trifoliolata) desert olive (Forestiera shrevei) devilwood (Osmanthus americanus) Goodding's ash (Fraxinus gooddingii) rough menodora (Menodora scabra) spiny menodora (Menodora spinescens) stretchberry (Forestiera pubescens) velvet ash (Fraxinus velutina) Onagraceae beach evening primrose (Oenothera drummondii) Berlandier's sundrops (Oenothera berlandieri) Booth's suncup (Eremothera boothii) California evening primrose (Oenothera californica) California suncup (Eulobus californicus) common evening primrose (Oenothera biennis) creeping water primrose (Ludwigia adscendens) delicate clarkia (Clarkia delicata) diamond clarkia (Clarkia rhomboidea) elegant clarkia (Clarkia unguiculata) farewell to spring (Clarkia amoena) fireweed (Chamerion angustifolium) fourwing evening primrose (Oenothera tetraptera) fringed willowherb (Epilobium ciliatum) harlequinbush (Gaura hexandra) Hooker's evening primrose (Oenothera elata) hummingbird trumpet (Epilobium canum) Kunth's evening primrose (Oenothera kunthiana) Lindheimer's beeblossom (Gaura lindheimeri) longcapsule suncup (Camissonia chamaenerioides) Mexican primrose-willow (Ludwigia octovalvis) narrowleaf suncup (Eremothera refracta) New Mexico evening primrose (Oenothera neomexicana) pinkladies (Oenothera speciosa) prairie evening primrose (Oenothera albicaulis) rose evening primrose (Oenothera rosea) Saltillo evening primrose (Oenothera stubbei) scarlet beeblossom (Gaura coccinea) shortfruit evening primrose (Oenothera brachycarpa) silky evening primrose (Oenothera pubescens) Toumey's sundrops (Calylophus toumeyi) tufted evening primrose (Oenothera caespitosa) velvetweed (Gaura mollis) yellow cups (Chylismia brevipes) yellow evening primrose (Oenothera flava) Ophioglossaceae limestone adderstongue (Ophioglossum engelmannii) rattlesnake fern (Botrychium virginianum) slender adderstongue (Ophioglossum nudicaule) Opiliaceae margarita (Agonandra racemosa) Orchidaceae autumn coralroot (Corallorhiza odontorhiza) Chiricahua adder's-mouth orchid (Malaxis macrostachya) cow's horn orchid (Cyrtopodium punctatum) daddy longlegs orchid (Brassavola cucullata) flor de los santos (Laelia eyermaniana) green ladies' tresses (Spiranthes polyantha) hooded coralroot (Corallorhiza striata) Huachuca Mountain adder's-mouth orchid (Malaxis corymbosa) largeflower crested coralroot (Hexalectris grandiflora) leafless beaked lady orchid (Sacoila lanceolata) Michaux's orchid (Habenaria quinqueseta) pine-pink (Bletia purpurea) rattail orchid (Oncidium cebolleta) shortflowered bog orchid (Platanthera brevifolia) spotted coralroot (Corallorhiza maculata) stream orchid (Epipactis gigantea) threebirds (Triphora trianthophora) Thurber's bog orchid (Platanthera limosa) tropical widelip orchid (Liparis vexillifera) Orobanchaceae alpine cancer-root (Conopholis alpina) American cancer-root (Conopholis americana) Applegate's Indian paintbrush (Castilleja applegatei) Arizona bluehearts (Buchnera obliqua) Arizona desert foxglove (Brachystigma wrightii) Cooper's broomrape (Orobanche cooperi) Eagle Pass blacksenna (Seymeria bipinnatisecta) Huachuca Mountain Indian paintbrush (Castilleja patriotica) lesser Indian paintbrush (Castilleja minor) Mogollon Mountain lousewort (Pedicularis angustifolia) najicoli (Lamourouxia viscosa) pygmy bluehearts (Buchnera pusilla) Rincon Mountain Indian paintbrush (Castilleja