Hardy Exotic Plants for Naturalization. 49 



Europe. Tuber ; 4 inches ; yellow ; winter ; division. — 

 Bare places in woods or copses, shady or sunny 

 banks, and also under isolated trees, of which the 

 branches rest on the grass of the lawn or pleasure- 

 ground. 



Christmas Rose. Hdleborus niger. Europe, i foot ; 

 white; winter; division. — A well known plant, which 

 will be seen to greater advantage on sunny, yet sheltered 

 grassy banks, than on the margins of shrubberies, if any 

 choice as to position may be made. 



Olympian Hellebore. Hdleborus olympicus. India. 

 Evergreen perennial ; 2 feet ; green ; winter ; division. — 

 Grassy, sunny banks, like preceding, and also for the 

 margins of shrubberies, and for broken ground. 



Alpine Columbine. Aquilegia alpina. Switzerland. 

 Herbaceous perennial ; 9 to 12 inches ; blue ; early 

 summer ; seed or division. — Well worthy of natu- 

 ralization in cool, moist, sandy soil, in stony places 

 near cascades, and on similar places in elevated posi- 

 tions. 



Canadian Columbine. Aquik^a canadensis. N. 

 America. Herbaceous perennial ; i to 2 feet ; red and 

 orange ; spring and early summer ; seed or division. — 

 Sandy soils in rather open spots, amidst thin grass and 

 not very rampant herbaceous plants. 



Sky-blue Columbine. Aquilegia ccerulea. N. Ame- 

 rica. Herbaceous perennial ; i to 2 feet ; blue and 

 white; summer; seed or division. — Excellent in very 

 sandy, well-drained soil in an open position among herbs 

 not too vigorous in habit, and not reaching much over 

 one foot high. 



