Wedelia Weigela Weingartia Weldenia Welwitschia Westringia Widdringtonia Wigandia Wigginsia Wikstroemia Wilsonaria (hybrid orchid genus) Pleiospilos (living granite) Pleurothallis (an orchid genus) Odontoglossum (an orchid genus) Haberlea Habranthus Hacquetia Haemanthus (blood lily) Scaevola Schefflera Schima Schinus Schisandra Schizachyrium Schizanthus Schizopetalon Schizophragma Schizostylis Schlumbergera Schoenoplectus Schomburgkia Schotia Schwantesia Sciadopitys Scilla Scindapsus Scirpoides Sclerocactus Scoliopsus Scopolia Scrophularia (figwort) Scutellaria Securinega Sedum (stonecrop) Selaginella Selago Selenicereus Selinum Semele Semiaquilegia Semiarundinaria Sempervivum (hens and chicks) Senecio (ragwort) Senna (herb) Sequoia (coast redwood) Sequoiadendron (giant sequoia) Seriphidium Serissa Serruria Sesbania Sesleria Setaria Shepherdia Shibataea Shortia Sibiraea Sidalcea Sideritis Silene (campion) Silphium Silybum Simmondsia (jojoba) Sinningia Sinocalycanthus Sinofranchetia Sinojackia Sinowilsonia Sisyrinchium Skimmia Smilacina Smilax Smithiantha Smyrnium Sobralia Solandra Solanum (potato, nightshade) Soldanella (snowbell) Soleirolia Solenopsis Solenostemon Solidago (goldenrod) Solidaster (hybrid genus) Amaryllis Amberboa Amelanchier Amesiella Amherstia Amicia Ammi Ammobium Amorpha Amorphophallus Ampelopsis Amsonia Anacampseros Anacyclus Anagallis (pimpernel) Ananas (pineapple) Anaphalis Anchusa Andromeda Andropogon Androsace Anemone (windflower) Anemonella Anemonopsis Anemopaegma Anethum (dill) Angelica Angelonia Angophora Angraecum (an orchid genus) Coix Colchicum (autumn crocus, meadow saffron) Coleonema Colletia Collinsia Collomia Colocasia (taro) Colquhounia Columnea Colutea (bladder senna) Coluteocarpus Colvillea Combretum Commelina (day flower, spiderwort) Comptonia Conandron Congea Conicosia Coniogramme Conophytum Consolida (larkspur) Convallaria (lily-of-the-valley) Convolvulus (bindweed, morning glory) Copernicia (wax palm) Copiapoa Coprosma Coptis (goldthread) Cordia Cordyline Coreopsis (tickseed) Coriandrum (coriander cilantro) Coriaria Cornus (dogwood) Corokia Coronilla Correa Corryocactus Cortaderia (pampas grass, tussock grass) Cortusa Corydalis Corylopsis (winter-hazel) Corylus (hazel, filbert) Corynocarpus Corypha Coryphantha Cosmos Costus Cotinus (smoke tree) Cotoneaster Cotula Cotyledon Crambe Craspedia Crassula Crataegus (hawthorn) Crepis Crinodendron Crinum Crocosmia Crocus Crossandra Crotalaria (rattlebox) Crowea Cryptanthus Cryptbergia (hybrid genus) Aptenia Aquilegia (columbine) Arabis (rock cress) Arachnis (scorpion orchid) Araeococcus Aralia Araucaria (monkey-puzzle) Araujia Arbutus (madrone) Archontophoenix (king palm) Arctostaphylos (bearberry, manzanita) Arctotheca Arctotis (African daisy) Dionaea (Venus flytrap) Dionysia Dioon Dioscorea (yam) Diospyros Dipcadi Dipelta Diphylleia Diplarrhena Diplazium Diplocyclos Dipsacus (teasel) Dipteronia Dirca Disa (an orchid genus) Pratia Primula (primrose) Prinsepia Pritchardia Proboscidea (unicorn plant) Promenaea Prosopis (mesquite) Prostanthera (mint bush) Protea Prumnopitys Prunella (self-heal) Prunus (almond, apricot, cherry, peach, plum) Pseuderanthemum Pseudocydonia Pseudolarix (golden-larch) Pseudopanax Pseudosasa Pseudotsuga (douglas-fir) Pseudowintera Psiolotum Psychopsis (butterfly orchid) Psylliostachys (statice) Ptelea Pteris (brake, table fern) Pterocactus Pterocarya (wingnut) Pteroceltis Pterocephalus Pterodiscus Pteropogon Pterostyrax Ptilotus Ptychosperma Pueraria Pulmonaria (lungwort) Pulsatilla Pultenaea Punica (pomegranate) Purshia Puschkinia Putoria Puya Pycnanthemum Pycnostachys Pyracantha (firethorn) Pyrola (wintergreen) Pyrostegia Pyrrosia Pyrus (pear) Q [change | change source] 1.