Caragana, Common - Caragana arborescens - also Siberian Peashrub 
Caragana, Globe - Caragana frutex cv Globosa 
Caragana, Pygmy - Caragana pygmaea
Cedar - Thuja occidentalis - Eastern White Cedar or Eastern Arborvitae or Eastern Thuja
Cherry, Cistena - Prunus x cistena - also Cistena Plum or Purpleleaf Sandcherry
Cherry, European Birdcherry - Prunus padus var. commutata - also Mayday Tree
Cherry, Nanking - Prunus tomentosa 
Cherry, Pincherry - Prunus pensylvanica
Chokecherry, Amur - Prunus maackii 
Chokecherry, Common - Prunus virginiana
Clematis, Bigpetal - Clematis macropetala
Clematis, Golden - Clematis tangutica 
Clematis, Hybrid - Clematis hybrids
Clematis, Jackman - Clematis x jackmanii
Clematis, Western White - Clematis ligusticifolia
Corktree, Amur - Phellodendron amurense
Cotoneaster, Hedge - Cotoneaster lucidus (syn. Cotoneaster acutifolia)
Cotoneaster, Redbead - Cotoneaster racemiflora var. soongorica
Cottonwood - Populus deltoides - also Cottonwood Poplar
Crabapple/Apple, Hybrid - Malus - White Flowered hybrids
Crabapple, Rosybloom - Malus x adstringens
Crabapple, Siberian - Malus baccata
Cranberry - Vaccinium vitis-idaea - also Dwarf Cranberry or Lingonberry
Cranberry - Viburnum opulus - also European Cranberrybush 
Cranberry - Viburnum trilobum - also American Cranberrybush or Highbush Cranberry
Creeper, Thicket - Parthenocissus inserta
Creeper, Virginia - Parthenocissus quinquefolia (and cv Engelmannii - Engelmanns Ivy)
Currant, Alpine - Ribes alpinum
Currant, Clove - Ribes odoratum - also Buffalo Currant
Currant/Gooseberry, Hybrid - Ribes hybrids
Currant, Siberian - Ribes diacanthum


