ORC 



411 



OT I 



Sandy 



palustris, grow more vigorously if their 

 pots are set in saucers of water during 



the snininer months. 



" To the foregoing rules the following 

 advice uiay be added. Do not aim at 

 liaving too large a collection, but rather 

 strive to grow a few good kinds in the 

 best style." 



ORCHIS. Thirty species. Chiefly 

 hardy orchids. Seed. Chalky loam and 

 peat. 



ORIGANUM. Marjoram. Eight spe- 

 cies and some varieties. Hardy herba- 

 ceous and half-hardy evergreen shrubs. 

 The former are increased by division ; 

 the latter by slips and cuttings, 

 loam. See Marjoram. 



ORMOSIA. Two species, 

 evergreen trees. Cuttings, 

 peat. 



ORNITHIDIUM. Two species. 

 Stove epiphvtes. 



ORNITHOCEPHALUS. Two species. 

 Stove ep'phytes. Both these genera 

 are increased by dividing the bulbs, and 

 planting them in moss and wood. 



ORNITHOGALUM. Fifty-nine spe- 

 cies. Hardy, half-hardy, and green- 

 liouse bulbs. Otfsets. Sandy loam and 

 peat. 



ORNITHOGLOSSUM. Two species. 

 Green-house bulbs. Offsets. Sandy loam 

 and peat. 



ORNIX rhodophagella. Rose Moth. 

 Mr. Kollar says that — " In early spring, 

 as soon as the rose tree begins to bud, 

 if the new leaf-shoots are closely ex- 

 amined, a little brownish seed is found 

 here and there attached to them, in 

 which a worm — the larva of a small 

 moth, is concealed, which gnaws the 

 tender shoots. When it has devoured 



They immediately form for themselves 

 small cases of parts of the leaves, and 

 pass the winter in them at the root of 

 the rose-tree." 



ORNUS. Flowering ash. Five spe- 

 cies. Hardy deciduous trees. Seed 

 and grafting, or buddingj on common 

 ash. Light loam. 



O 110 13 US. Thirty-eight species. 

 Hardy herbaceous, except O. saxatitis, 

 which is annual, and O. Americanus, a 

 green-house evergreen shrub. Seed 

 and division. Light loam. 



ORTEGIA. Two species. Hardy 

 herbaceous. Seed and cuttings. Sandy 

 Sandy loam and peat, well drained. 



0RTH0T,TiNIA, 0. resinella, tur- 

 Stove I pentine moih ; O. turionana, bud tor- 

 trix. See Tortrix. 



ORTHROSANTHUS multiflorus. 

 Green-house herbaceous. Seed and di- 

 vision. Loam and peat. 



OSAGE-Al'PLE. Maculura. 



OSBECKIA. Six species. Stove 

 shrubs, deciduous, and evergreen. 

 Young cuttings. Sandy loam and peat. 



OSIER. Salix viminalis. 



OSMITES. Three species. Green- 

 house evergreen shrubs. Cuttings. Light 

 rich soil. 



OSxMUNDA. Seven species. Hardy 

 ferns. Seed and division. Light rich 

 ioam. 



OSTEOSPERMUM. Thirteen spe- 

 cies. Green-house evergreen shrubs. 

 Cuttings. Light rich loam. 



OSTRYA. Hop-hornbeam. Two spe- 

 cies. Hardy decii'uous tree. Seed and 

 layers. Common soil. 



"OTANTHUS MariliiMis. Hardy her- 

 baceous. Cuttings. Sandy loam. 



OTHOUNA. Twenty-six species. 



one shoot it removes, with its house, Green-house evergreen shrubs, herba 



and attacks another: and thus 

 short time, one of these larva; can strip 

 a whole branch of its shoots. The larva, 

 which lives in the little case, is only a 

 few lines long, yellow, with a black 

 head, and black spotted collar. It un- 

 dergoes pupation in its case. 



" The moth appears at the end of 

 May. It is only tliree lines long, car- 

 ries it wings very close to its body — al- 

 most wrapped round it. The whole 



ceous, and bulbs, except O. tagetes, an 

 annual. This is increased by seed, 

 and the others by cuttings, division, or 

 offsets. Light rich loam. 



OTIORHYNCUS suZra/us. The suc- 

 culent Weevil. Mr. Curtis remarks 

 that: — 



" Sedums, and other succulents, in 

 green-houses, will frequently be ob- 

 served to get sickly, ami perhaps die, 

 without any apparent reason. When 



body is silvery shining gray, the upper, this is the case they should be carelully 

 wings strewed with minute black dots, j examined, and the grubs of the weevil 

 deeply fringed at the posterior edge, will be found to have eaten off the plant 

 The moth lays her eggs in May on the close to the surface of the soil, 

 buds of the rose tree, and the caterpil- 1 " These grubs are about half an inch 

 lars are hatched at the end of June, llong, of a dirty white colour, thick aud 



