302 GARDEN FLOWERS. 



PoLANisiA. [Capparidace^e.] Hardy annuals, allied to 

 Cleome. Seeds sown in a frame in April, and pricked out in 

 the borders in May, will bloom in June. 



P. Cheladonii (Cheladon's) ; hardy annual ; i8 inches ; flowers 

 rose, in July ; East Indies ; 1792. P. dodecandra (twelve-an- 

 thered) ; hardy annual; 18 inches; flowers white, in July; 

 East Indies ; 1795. P. graveo lens {sir ong-smQlYmg) ; hardy an- 

 nual ; 18 inches; flowers yellowish-white ; North America. P. 

 uniglatidiilosa (one-glanded) ; hardy annual ; i foot ; flowers 

 white and red, in July ; Mexico ; 1823. P. viscosa (clammy) ; 

 hardy annual ; 2 feet ; flowers yellow, in summer ; East Indies ; 

 1730. Variety 2V^i-<2;^</r^ (twenty-anthered) ; 18 inches ; flowers 

 yellow, in July ; Ceylon; 1730. 



PoLEMONiUM. Greek Valerian. [Polemoniaceae.] Orna- 

 mental hardy perennials, of easy culture, growing readily in 

 ordinary good garden soil, and increased by division of the 

 plant, and, generally, very freely by seeds, which should be 

 sown in June to produce flowering plants for the next year. 



P. coeruleuin (blue) ; hardy perennial ; 2 feet ; flowers blue or 

 white, in June ; Britain. There is a variety with variegated 

 foliage. /*. ^r<2«7^ (slender) ; hardy perennial; i foot ; flowers 

 blue, in June ; Dahuria ; 1818. P. hiimile (dwarf) ; hardy per- 

 ennial ; I foot ; flowers blue, in July ; North America ; 1826. P. 

 Mexicanu7n (Mexican) ; half-hardy perennial ; 18 inches ; flowers 

 blue, in May ; Mexico ; 1817. P . pulcherriimim (prettiest) ; har- 

 dy perennial ; 9 inches ; flowers blue, in July ; North America ; 

 1827. P. Sibiriciim (Siberian) ; hardy perennial ; 2 feet ; flow- 

 ers white, in June ; Siberia ; 1800. 



PoLiANTHES. Tuberose. [Liliaceaj.] Greenhouse bulbs, 

 annually imported from Italy. Soil, a rich sandy loam. In- 

 creased by offsets. When in growth, they are benefited by 

 warmth at the root. For special culture, see " Flowers for 

 the Parlor and Garden." 



P. tuberosa (tuberous); greenhouse bulb ; 3 feet ; flowers white, 

 single or double, in August ; East Indies ; 1629. 



