HEXACENTRIS. 



158 



HOE. 



Herb-Robert. — A kind of wild \ 

 Geranium, very common by the 

 road-sides througliout England and | 

 the north of France. 



Heron's Bill. — See Ero'dium. j 



Hespera'ntha. — Iridece. — The | 

 Evening Flower. — A genus of Cape ; 

 bulbs, nearly allied to Txia, and ] 

 requiring the same treatment. | 



He'speris. — Cruciferce. — The ! 

 Garden Rocket. — These flowers, ! 

 though very common, are rarely ■ 

 well grown, as they require a great | 

 deal of care to bring then^ to per- , 

 fection. They are all perennials ; i 

 and as soon as they have done 

 flowering, they should be taken up, 

 and transplanted into fresh and 

 very rich soil, which must be of a 

 light and friable nature. The best 

 is, perhaps, that which has been 

 used during the preceding summer 

 for celery trenches. Thus treated, 

 the double white and double purple 

 varieties of H. niatronalis will 

 attain an extraordinary size, and 

 will flower splendidly. 



Hexace'ntris. — Acanthacece. — 

 This genus has been separated from 

 Thunbergia, principally on account 

 of the shaggy anthers of the flowers. 

 The name of HexaceiUris, which 

 signifies "six spurs," alludes to 

 the spurs proceeding from the base 

 of the anthers. This genus was 

 little known till the exhibition of 

 a splendid creeping plant called ' 

 Hexacentris mysorensis at the May 

 show at Chiswick in 1852. It was 

 trained over an umbrella-shaped 

 trellis, from which its beautiful 

 crimson and yellow flov/ers hung 

 down in long racemes, forming a 

 kind of fringe. The pendulous 

 racemes of flowers grow from a foot 

 to two feet long, and they are 

 covered with bunches of flowers 

 and buds. The plant is a native 

 of the East Indies, and of course 

 requiies a hothouse in this country. 



Hibbe'rtia. — Dilleniucece. — 

 Trailing shrubs vnth. large yellow 

 flowers, natives of New Holland, 

 which reo^uire a greenhouse in Eng- 

 land. They should be grown in a 

 mixture of sandy loam and peat, 

 and they are propagated by cuttings. 



Hibi'scus. — Malvacece. — Showy 

 plants with large handsome flowers, 

 of which the hothouse species, which 

 are mostly from China, require a 

 strong moist heat. Hibiscus sijrla- 

 cus, the ALthcea frutex, is a hardy 

 shrub, which will grow well in any 

 common garden-soil, and of which 

 there are numerous splendid varie- 

 ties ; some of the best being those 

 raised by Mr. Masters, of Canter- 

 bury. The Althce^a frutex is pro- 

 pagated by seeds or layers. Several 

 of the difi"erent kinds of Hibiscus 

 are marsh plants, which grow best 

 in pots suspended in water from 

 the side of a pond. — See Water- 

 plants. 



Hi'ndsia. — Rubiacece. — A new 

 genus formed on the purple-flow- 

 ered kinds of Rondeletia. H. vio- 

 Icicea is a very splendid stove shrub, 

 introduced in 1844. 



Hip. — The fruit of the wild 

 Rose. 



Hippea'strum. — A genus nearly 

 allied to Amaryllis. 



Hippo'phae. — ElceagnacecE. — 

 Sea-Buckthorn. — Handsome hardy 

 shrubs, natives of North America, 

 which will grow in any common 

 soil, and are increased by layers. 



Hippu'ris.— iTaZoraf/coE.— Mare's- 

 tail.- — A British aquatic : some- 

 times planted in ponds, &c., to 

 hide their termination, and to give 

 the water the appearance of a natu- 

 ral stream. 



Hoe.— There are many different 

 kinds ; but they may all be reduced 

 to two classes : the draw-hoes, 

 which have broad blades, and are 

 used for drawing up the earth to 



