210 GARDEN FLOWERS. 



(hybrid); hardy perennial; i8 inches; flowers blue, in June; 

 Italy ; 1820. I.ochrole2ica{y&\\o\v\fih) ; hardy perennial : 2 feet ; 

 flowers pale-yellow, in July; Levant; 1757. I. pallida {^2\€)\ 

 hardy perennial ; 3 feet ; flowers pale-bluo, in June ; Turkey ; 

 1596. /. Persica (Persian) ; hardy bulb ; 6 inches ; flowers pale- 

 blue, orange and black, in May ; Persia; 1629. I.p7imila{A\s2.xi)\ 

 hardy perennial ; 3 inches ; flowers purple, yellow, or white, in 

 May; Austria; 1596. /. Ruthenica (Russian); hardy peren- 

 nial; I foot ; flowers blue, in May; Siberia; 1804. I. sainbu- 

 cina (elder-scented) ; hardy perennial ; 2^ feet ; flowers purple 

 and white, in June ; south of Europe ; 1658. /. Sibirica (Sibe- 

 rian) ; hardy perennial ; 3 feet ; flowers blue or white, in June ; 

 Siberia; 1596. L siib-biftora (sub-two-flowered); hardy peren- 

 nial; I foot; flowers blue, in May; Portugal; 1596. I. Susi- 

 aiia (Susian) ; hardy perennial ; 2 feet ; flowers striped, in May ; 

 Levant; 1596. /. Swertii (Swert's) ; hardy perennial; 18 

 inches; flowers white, in May; Hungary; 1819. I. Xiphioides 

 (great bulbous); hardy bulb; 18 inches; flowers various, in 

 June; Spain; 1571. /. Xiphiiun (small bulbous) ; hardy bulb ; 

 18 inches ; flowers various, in June ; Spain ; 1596. 



Many other species are in cultivation, and many very fine 

 named varieties may be obtained of florists. The last few 

 years have witnessed a great improvement in this plant. I. 

 Persica is one of the most beautiful early-flowering spring 

 bulbs. The flowers are of a most delicate texture, bright 

 purple and yellow, with pearl-colored ground. They only 

 require to be planted in a rich soil in the autumn, and may 

 remain for years undisturbed. 



ISANTHUS. [Labiatae.] Hardy annual. Propagated by 

 seeds sown in the border in May, or earlier in a frame, and 

 transplanted. 



/. coeruleus (blue) ; hardy annual ; i foot ; flowers blue, in 

 July; North America ; 1818. 



IsoTOMA. [Lobeliaceae.] A pretty dwarf blue flowering 

 plant, resembling a Lobelia, requiring greenhouse protec- 



