Osyris 



( 149 ) 



Ovary 



OSYRIS. 



Half-hardy evergreen shrubs (ord. Santalacess). 

 Propagation, bv cuttings of ripened wood under a 

 bell-glass. Soil, fibrous loam and sand. 



Principal Species : 



alba, '.V, My., wh., fruits red. 



OTACANTHUS. 



Stove herbs (ord. Acanthacere), closely allied to 

 Ruellia. Propagation, by cuttings in sandy soil 

 beneath a bell-glass over mild bottom heat. Soil, 

 fibrous loam, leaf mould, peat, and sand. 



Principal Species : 



cceruleus, 2', aut., pur. bl. or vio. bl. 



OTHERA. 



A hardy shrub (ord. Ilicinese). It thrives under 

 the same culture as Ilex, to which it is referred by 

 the Kew authorities. 



Only Species : 



japonica, 3', sum., wh. (correctly Ilex Integra). 



OTHONNA. (RAGWORT.) 



A genus of annual, herbaceous, tuberous-rooted, 

 ;m<l evergreen greenhouse plants (ord. Composite) 

 from South Africa. Propagation, by seeds for the 

 annuals, division for the herbaceous and tuberous- 

 rooted perennials, and cuttings for the shrubs. 

 Soil, three parts fibrous loam and one part sandy 

 peat. Ample drainage is essential, and, given this, 

 cultivation is easy. 



Principal Species : 

 am|>lexifolia,li', Je., yel., 



shrubby, 

 caraosa. 10", sum., yel., 



sub-shrub, 

 cheirifolia (see Othounop- 



sis cheirifolia). 



OTHONNOPSIS. 



Described as greenhouse shrubs (ord. Composite), 

 but cheirifolia is hardy in sheltered places, even in 

 northern gardens. 



Principal Species : 



cheirifolia, 1 J', My., yel. ($yn. Othonna cheirifolia). 



OTIORHYNCHUS. 



The tiny beetles or weevils that constitute this 

 pen us are hardy little creatures, of either dull 

 brown or dull black colour, -J" to i" long, and with 

 short tapering beaks. They are adepts at hiding 

 in refuse and crevices, all are night feeders, and, 

 fortunately for the gardener and farmer, they are 

 wingless. White cloths or tarred boards laid or 

 held under infested plants while the latter are 

 shaken at night, or a bright light is flashed upon 

 t hem, are methods of catching the weevils. Where 

 the infestation is very bad, the removal of several 

 inches of surface soil is advised, burning or gas- 

 liming it, and replacing with clean, fresh material. 

 The chief species are sulcatus, Vine Weevil ; tene- 

 bricosus, Red-legged or Apricot Weevil ; and pi- 

 cipes, Clay-coloured Weevil. 



crassifolia, sum., yel., 

 drooping, basket plant. 



frutesceus, 2i', sum., yel. 



tuberosa, 2', Aug., yel., 

 tuberous-rooted herb. 



ihtrirk Fern (gee Onoclea, sijn. Struthiopteris). 

 Otif/yn Tea, (see Monanlu). 

 (ttaheite A/>j>le (xee Sptmdiai). 

 (Halieite Chestnut (Inocarpui edulis). 

 Otaheife Oranae (see Citrus and Orange). 

 iitit/iflra (sec (Teodorum}. 

 Otlilis (see IMincarjms). 

 Otidia (see Pelargonium). 



OTOCHILUS. 



Epiphytal Orchids (nrd. Orchidacese) from 

 Nepaul, that succeed in a stove or warm inter- 

 mediate house, if grown in peat and sphagnum on 

 a raft or in a Teak basket. As few roots are 

 produced, watering must be carefully done. 



Principal Species: 



fusca, 9", Jy., br., yel., ro., fragrant. 



OTOSTEGIA. 



A half-hardy evergreen (ord. Labiatse). Propaga- 

 tion, by cuttings under a hand-light. Any fertile 

 garden soil. 



Principal Species : 



scariosa, 9", Aug., pur. 



OTTELIA. 



Stove or greenhouse aquatics (ord. Hydro- 

 charideae). Propagation, by seeds. Soil, loam in 

 an immersed basket. 



Principal Species : 



alismoides, 6", sum., wh. ovalifolia, 6", sum., wh., 

 yel. 



OURISIA. 



Hardy perennials (ord. Scrophularinefe). Prop- 

 agation, by seeds and division. Any ordinary garden 

 soil will suit, provided a warm position is given. 

 They like partial shade and moisture. 



Principal Species : 



csespitosa, wh. Pearcei, 8", sum., sc., 



cocciiiea, 10", sum., sc. crim. 



OUVIRANDRA. (LATTICE- or LACS- 

 LEAF PLANT.) 



Stove aquatics (ord. Naiadacese) whose interest 

 lies in the exquisite lattice- or lace-like leaves. 

 Propagation, by seeds and division. Soil, sandy 

 loam immersed in water having a regular tempera- 

 ture of 70. 



Other Cultural Points. Those beautiful plants 

 are from Madagascar, and under cultivation they 

 need a semi-dark position such as is found beneath 

 the stage in a plant stove, but as in such a spot 

 their beauty is not readily seen, it is a good plan 

 to have a false bottom to the tank, consisting of a 

 sheet of iron, enamelled white (the white and the 

 green contrasting finely), with one or more circular 

 holes large enough to easily admit the flower pots. 

 Owner, gardener, or visitor can readily examine 

 the plants by raising this false bottom by means of 

 a chain attachment to the pot rims, and do so 

 without disturbing the specimens. Derbyshire spar 

 is sometimes used to cover the tank bottom, but, 

 as this soon becomes green, it does not long serve 

 as a contrasting background to the deep green of 

 the Lattice-leaf. 



Principal Species : 

 bernieriana, 2', Aug.,pk. 

 fenestralis, 2', Aug., wh. 



(correctly Aponogeton 

 fenestrale). 



OVARY. 



The part of a flower that forms the base of the 

 pistil and contains the ovules or unfertilised seeds, 

 is the ovary ; when the seeds are ripe the ovary 

 becomes a fruit. There are two very distinct types 

 of ovaries one, the superior ovary, as found in 

 Roses and Lilies, where it is within or above the 



Otoptera (see Vigna). 



Otostemma (see Jfoya). 



Our Lady's Milk thistle (sec Silytntm). 



