196 GARDEN FLOWERS. 



Hickory. See Carya. 



HiERACEUM. [Composite.] A large genus of yellow- 

 flowered composite plants, none of which are of much hor- 

 ticultural importance. Common soil. Increased by divis- 

 ion or by seeds. 



HiPPOPHAE. Sea Buckthorn. [Elaeagnaces.] Hardy 

 shrubs, allied to Shepherdia, doing well in sandy soil, and 

 propagated by layers and suckers. The species is H. 7'ham- 

 noideSj with the varieties angustifolia and Siberica. 



Holly. See Ilex. 



Hollyhock. See Althaea. 



Hologymne. See Lasthenia. 



Honesty. See Lunaria. 



Honey-Locust. See Gleditschia. 



Honeysuckle. See Lonicera and CAPRiFOLitrM. 



Honeywort. See Cerinthe. 



Hoop-Petticoat. See Corbularia. 



Hop. See Humulus. 



HoRMiNUM. [Labiatae.] A showy dwarf hardy herba- 

 ceous perennial, requiring a dry situation and a sandy soil, 

 or else to be kept in a dry cool frame in winter. Increased 

 by seeds or division. Not hardy in the Northern States. 



H. Pyrenaic2tm (Pyrenean) ; hardy perennial ; i foot ; flowers 

 blue-purple, in June ; Pyrenees ; 1820. 



Hornbeam. See Carpinus. 



Horn-Poppy. See Glaucium. 



Horse-Chestnut. See ^sculus. 



Horse-Tail. See Equisetum. 



HoTEiA. [Saxifragacese.] A very handsome hardy per- 

 ennial, formerly called Spiroea Japouica. Soil, sandy loam 

 and peat. Increased by division. 



H. Japouica (Japan) ; hardy perennial ; 3 feet ; flowers white, 

 in May; Japan ; 1835. 



