GARDEN FLOWERS. 2Q9 



Many of the above are not hardy, and there are some 

 thirty other still more tender species. 



PLATANTHERA. [Orchidaceae.] A family of orchids, 

 mostly hardy, formerly known as Orchis. Soil, peat, gener- 

 ally moist. AIL these plants are of difficult culture. The 

 species are P. obtusata, rotundifolia, orbiculata, Hookerii, brac- 

 teata, hyperborea, dilatata,flava, cristata, ciliaris, blephariglottis, 

 leitcophcea, lacera, psycodes, fimbriata, and peramtzna ; all na- 

 tives of North America. The flowers are very handsome. 



PLATANUS. Plane-tree. [Platanaceae.] Hardy deciduous 

 ornamental trees. Soil, deep loam. Propagated by seeds, 

 cuttings, and layers. 



P. Occidentalis (Western) ; 70 feet ; North America ; 1636. /*. 

 aurea variegata (golden- variegated-leaved) ; 70 feet ; 1846. P. 

 integrifolia (entire-leaved) ; 70 feet ; 1845. P. heterophylZa(ya.- 

 rious-leaved) ; America; 1842. P. Orientalis (Eastern); 50 

 feet; Levant; 1548. P. acerifolia (maple-leaved) ; 70 feet ; Le- 

 vant. P. cuneata (wedge-leaved) ; 20 feet ; Levant ; 1 739. P. 

 Hispanica (Spanish) ; 70 feet ; Spain. P. laciniata (cut-leaved); 

 70 feet ; 1845. P- monstrosa (monstrous) ; 70 feet ; 1845. 



The European species are somewhat tender. 



PLATYCODON. [Campanulaceae.] Hardy herbaceous per- 

 ennials. Propagated by seeds and division in the spring, 

 and by cuttings in the summer. Soil, sandy loam. 



P. grandiflorum (large-flowered) ; hardy perennial ; I foot ; 

 flowers blue, in June ; Dahuria ; 1782. Variety alba, from China, 

 has white flowers ; variety alba plena has semi-double flowers. 



These plants are half-hardy in the Northern States. 



PLATYSTEMON. [Papaveraceae.] Pretty annuals, of pros- 

 trate habit. They like a cool situation, and a peaty soil, 

 but will grow in any rich light earth. Sow about the middle 

 of May. 



P. Calif ornicum (Californian) ; hardy annual ; I foot ; flowers 

 sulphur-yellow, in June; California; 1823. 



