Key to 4Petals (Flowers with 4 Petals) Shared-Characteristic Group

Brassica nigra Black Mustard	Caulanthus heterophyllus San Diego Jewelflower	Isomeris arborea Bladderpod	Swertia parryi Deer's Ears	Ribes speciosum Fuchsia-Flower Gooseberry
Mirabilis laevis var. crassifolia Coastal Wishbone Bush	Camissonia bistorta ± California Sun Cup	Clarkia rhomboidea Diamond Clarkia	Oenothera deltoides Dune Evening-Primrose	Dendromecon rigida Bush Poppy
Plantago patagonica Desert Plantain	Rhamnus ilicifolia Holly-Leaf Redberry	Galium aparine Common Bedstraw	Cneoridium dumosum Bush-Rue a.k.a. Coast Spice Bush	Tamarix ramosissima Tamarisk, Salt-Cedar

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