Homalomena 



( 424 ) 



Hornbeam 



l>ium gigaiiteum and 

 Dibrachiou peltatum). 



Other Species : 

 fastuosus, flowers prn. 

 giganteus (/. Carum- 



HOMALOMENA (syn. HOMALONEMA). 



Dwarf evergreen stove plants (ord. Aroidese), 

 from the Enst Indies. Propagation, by seeds, 

 cuttings of the-stem, or divisions. Soil, peat, leaf 

 mould, sand, and charcoal. Moist and shady con- 

 ditions are essential to success. 



Principal Species : 

 insignis, 4" to 7", spathe rubescens, 11', sum., pur., 



ffrn., spadix wh. red, wh. (KI/II. rubra). 



picturata, 3" to 6", sum., Wallisii, sum., red., wh., 



grn., wh. (syn. Cur- variegated foliage (*//. 



meria picturat'a). Curmeria Wallisii). 



Other Species : 

 ptltata, 3',sum.,pk.,wh., Roe/lii, C", sum., br.. 



cream. crim. (xyn. Curmeria 



Eoezlii). 



HOMERIA. 



Cape plants (ord. Iridese) with bulbous or 

 tuberous roots, and producing showy flowers. 

 Though hardy in some situations, they are best 

 managed as cool greenhouse plants. Propagation, 

 by seeds and offsets. Soil, sandy peat. They 

 require scarcely any water when resting. 



Principal Species and Varieties : 

 colliiia, 1', spr., red, yel. miniata, 8", spr., red 



(./. Monua colliua). ( s .'/" s - colliua aud Mo- 



aurantiaca, 1', spr., or., raja miniata). 



red, yel. (nyns. auran- elegans, r,sum.,yel.,br., 



tiaca, Mora3a auraii- or. (si/us, spicata and 



tiaca, and Bobartia Morasa spicata). 



aurautiaca). lineata, 1', spr., red, yel. 



HOMOGYNE. 



This genus of Alpines (ord. Composites) is not 

 horticulturally valuable. The solitary heads of 

 white or purplish flowers are borne on stems not 

 ;ibove 1' high. A niche in the rock garden will 

 suit them. The only species occasionally cultivated 

 are alpina, discolor, and sylvestris. 



HONESTY (** LUNARIA). 



HONEY BEE. 



From a purely horticultural point of view the 

 Honey Bee (A/iis mellijwa) is valuable, inasmuch as 

 during its search for nectar and pollen it causes 

 pollination among flowers. This, as a general 

 rule, leads to Increased fertility on the part of 

 trees, shrubs,'and plants visited by the little workers. 

 Some varieties of Pears and Apples are well-nigh 

 .^elf sterile, hence those who have charge of orchards 

 should obtain the assistance of bees and so secure 

 cross-pollination and good crops. 



HONEYDEW. 



The exudation of sticky, sugary sap from the 

 leaves and green parts of some plants is popularly 

 known as honeydew. Such exudation usually 

 takes place during a period of drought and heat, 

 and is a proof that the plants affected are "out of 

 sorts," that is, their respiratory and digestive organs 

 are not in proper order. Lime trees, when in good 



Homoianthtts (see Perezia). 



Honey Berry (see Melicoeca lijvga). 



Honey Flower (see Melianthus). 



Honey Locust (see Gleditscliia). 



Honeysuckle, African (see Halleria lucida). 



Honeysuckle, French (see Hedysarummultijuyum'). 



Honeymort (see Cerinthe). 



soil, frequently produce honeydew so extensively 

 that the sticky moisture dropping- on a pavement 

 will make it quite slippery. The stickiness of 

 leaf and branch caused by aphides must not be 

 confounded with this extravasation of sap. The 

 latter can sometimes be corrected by watering with 

 a weak solution of common salt, as this gives 

 greater fluidity to the sap and reduces the secre- 

 tion of starchy matter. 



HONEYSUCKLE. (LONICERA.) 

 Beautiful and free-flowering, erect and shrubby 

 climbers (ord. Caprifoliaceae). The species are 

 best provided with a position in the front of the 

 shrubbery. The dwarfer ones may be accorded a 

 place in the rock garden, whilst the climbers are 

 seen to the best advantage on the walls of houses 

 (see p. 425), on pergolas, balconies, and trellises. 

 Though the fragrance of Caprifolinm and Pericly- 

 menum is well known, the beauty of their red 

 fruits is often overlooked. All should be given a 

 rather moist loam with exposure to sun. (For 

 species, varieties, and culture, see LONICERA.) 



HOODIA. 



These greenhouse succulents {ord. Asclepindese) 

 have spiny, angled stems ; they are dwarf and 

 perennial. ' Propagation, by cuttings, placed on a 

 greenhouse shelf, in the sun, to allow the wound to 

 heal before they are inserted. Broken brick rubble, 

 sand, and good loam, in equal quantities, form ,1 

 suitable compost. Established specimens need 

 abundance of water during summer, but little 

 during winter. Never shade them. 



Principal Species : 

 Baiuii, 1', Jy., Aug., yel., Gordonii, !!', Jy., Aug., 



pur. buff, pur." 



HORDEUM. 



Several species of Hordeum (ord. Gramineaj) are 

 of great economic value, as they produce Barley. 

 AH the species are handsome Grasses, but jubatum 

 is about the only one cultivated in the garden as an 

 ornamental plant. Propagation, by seeds sown in 

 autumn or spring. 



Principal Species : 

 distichoii. murinum. 



jubatum, 2', hdy. aun. vulgare. 



maritinnmi. 



HOREHOUND. 



Formerly Horehound was more used in medicine 

 than at present for its tonic properties. It still, 

 however, enters into domestic remedies. The drug 

 is obtained from Marrubium vulgare (ord. Labia- 

 tse). It is probable that the hoary appearance of 

 this species suggested the popular name, and that 

 the common appellation is merely a corruption of 

 Hoarhound. (See atso MAERUBIUM.) 



HORNBEAM. 



The white, hard, and close-grained timber pro- 

 duced by members of the genus Carpinus doubtless 

 suggested the popular name of Hornbeam. Both 

 the Common Hornbeam (Carpinus Betulus) and 

 the more showy Hop Hornbeam are elegant park 



Jfon/tera (see llrod'uca). 

 Hoop Petticoat (see Narcissus). 

 Hop (see Humulus). 

 Hoplophytum {see ^climca). 

 Horliflia (see 1'otcnttlla). 

 Horminum (see Salvia). 



