7i8 ORNITHOGALUM. THE ENGLISH FLOWER GARDEN. 



OROBUS. 



survive. It has mottled foliage, and 

 small purplish flowers, in heads like the 

 Hop, hence the name Hop-plant. O. 

 Sipyleum is similar, and is quite as pretty. 

 In the open air these plants should have 

 a warm spot in the rock-garden. 



OENITHOGALUM (Star of Bethle- 

 hem}. Bulbous plants, some of them 



turn natives mostly of S. Europe, N 

 Africa, and Asia Minor. The fine O. 

 arabicum is not to be grown out of doors, 

 save in very warm gardens in the south. 



Ornus. See FRAXINUS. 



OEOBUS (Bitter Vetch}. Often pretty 

 plants of the Pea order, flowering usually 

 in spring. They are suitable for the 



Orchis foliosa (Madeira Orchis). 



handsome, others not very distinct, but all 

 useful in the Grass and in borders, in any 

 good garden soil one or two kinds among 

 the hardy species important for choice 

 borders and bulb beds, i.e., pyramidale and 

 latifolium. Among other kinds worth 

 growing are nutans (free in grass), narben- 

 nense, sororium, exscapum, and umbella- 



mixed border, for the rougher parts of 

 the rock-garden, or for naturalising. 

 We mention only the distinct kinds. 



0. aurantius is a handsome plant, 18 

 to 24 in. high, with orange-yellow flowers 

 in early summer. O. tauricus is a nearly- 

 allied species, also with orange flowers. 

 Both require to be well established before 



