ON PLANTS PRODUCING DOUBLE FLOWERS. 
Berberidacea. 
Berberis, sp. cult. (Dr. Masters !) 
Papaveracee. 
Papaver Rheeas, Linn. Euro 
P. bracteatum, Lindl. (P. Seg Linn). Russia. 
P. somniferum, Zinn. Europ. austr., Asia min., ZEgyptus. 
Chelidonium majus, Zinn. Europa, Asia. 
Sanguinaria Canadensis, Zinn. Amer. sept. 
Podophyllum peltatum, Zinn, Amer. sept. 
Crucifere. 
Mathiola incana, R. Brown. Reg. Medit. 
M. glabrata, De Cand. Patria ? 
M. annua, Sweet. Europ. austr., Syria. 
Cheiranthus Cheiri, Linn. pl 
Iberis umbellata, Zinn. Europ. a 
Cardamine pratensis, Linn. itarope, gen Africa, America. 
Hesperis matronalis, Zinn. Europa, Sibiria. 
Barbarea vulgaris, R. Brown. Europ., Oriens. 
Sinapis arvensis, Zinn. Europ. 
Brassica oleracea, Linn. Europ. 
Helianthemum variabile, Spach. Europa, Afr. bor. 
Violacee. 
Viola odorata, Zinn. Europa, Sibiria. 
V. grandiflora, Linn, Europa. 
Caryophyllee. 
Dianthus barbatus, Linn. Gallia, Germania. 
Chinensis, De Cand. China. 
Poiretianus, Seringe. Patria ? 
Caryophyllus, Zinn. Gallia, Italia. 
arboreus, Linn. Creta. 
hybridus, auct. Patria ? 
corymbosus, Sió., Sm. Asiam 
plumarius, Lim». Europa, deed Amer. -apt 
deltoides, Zinn. Europ. 
bd abd: 
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