Lewis' Mock Orange, Mock Orange: Philadelphus lewisii (Synonyms: Philadelphus confusus, Philadelphus trichothecus, Philadelphus zelleri) - Large shrub. Flowers with 4 petals.
Common Whipplea, Modesty, Whipple Vine, Yerba de Selva: Whipplea modesta - Shrublet. Flowers with 5-6 petals.