184 ON PLANTS PRODUCING DOUBLE FLOWERS. 
Lricacee. 
Calluna vulgaris, Zinn. Europa, Amer. bor. 
Rhododendron Indicum, Sweet (Azalea Indica, Linn.). . Ind. orient. 
R. ponticum, Linn. Asia min., Iberia. 
Azalea nudiflora, Zinn. Amer. sept. 
A. glauca, Lam. Amer. sept. 
Arbutus Unedo, Zinn. Europ. austr., Sibiria. 
Erica Tetralix, Lin». Europ. 
E. cinerea, Linn. Europ. 
Primulacee. 
Primula villosa, Jacg. Europ. med. 
P. Auricula, Zinn. Europa. 
P. denticulata, Smith. Ind. orient. 
P. elatior, Jacg. Europa. ` 
P. prenitens, Ker (P. Sinensis, Lindl.). China. 
` Jasminec. 
Jasminum officinale, Zinn. Europ. austr. (China s 
J. Sambae, dit. Ind. orient. 
J. hirsutum, Hook. China. 
Oleacea. 
Syringa persica, Linn. Oriens. 
S. vulgaris, Linn. Europ. Persia. 
Apocynee. 
Vinca minor, Zinn. Europa. 
V. major, Linn, Europa. 
Nerium odorum, it. Ind. orient. 
N. Oleander, Linn. Europ. austr., Asia med. 
Tabernemontana coronaria, Willd. Ind. orient. 
Convolvulacee. 
Calystegia sepium, R. Brown. Europa, America, Asia. 
C. pubescens, Lindl. China. 
Convolvulus tricolor, Linn. Europ. austr. 
Ipomæa pandurata, Meyer. Am. austr. 
