Oxybaphus 



( 151 ) 



Oyster Shell Bark Louse 



OXYBAPHUS. (UMBRKLLA-WORT.) 



Hardy and half-hardy perennials (ord. Nycta- 

 ginese). Propagation, by seeds sown out of doors 

 in May. Soil, sandy loam. Protection should be 

 afforded in winter. Practically all the species are 

 purple flowered, but they are seldom seen in 

 cultivation. 



Principal Species : 



californicus, '2', Jy., pur. nyotagineus, 1', Aug.,pur. 



floribuudus, 1', Jy., pur. violaceus, 1', Jy., vio. 



(syn. Alliouiaviolacea). 



OXYCOCCUS. 



Hardy evergreens (ord. Vacciniaceaj), notable as 

 producing the well-known Cranberries, which see. 

 Propagation is easily effected by layering the 

 creeping stems, or by cuttings. Peaty soil best 

 suits them, and if it is always moist, so much the 

 better, as they like swampy places. 



Principal Species : 

 macrocarpus, 9", My., palustris, 6", My., pk. 



pk. (KI/HH. Vaccinium ; >////*. vulgaris and 



macrocurpon and V. Vaccinium Oxycoccus). 



Oxycoccus var. oblongi- Common Cranberry. 



folium). American 



Cranberry. 



OXYDENDRON. 



Hardy trees (ord. Ericacere). Propagation, by 

 imported seeds. Soil, moist, fibrous peat. 



Principal Species : 



arboreum, 20' to 4(X, sum., wh. (syns. Andro- 

 meda and Lyonia arborea). 



OXYLOBIUM. 



Greenhouse evergreen shrubs (ord. Leguminosffi). 



Propagation, by seeds (after soaking), and by 



cuttings, both in heat. Soil, light, fibrous peat, a 



little loam, and charcoal. Abundant drainage is 



' essential. 



Principal Species : 



Callistachys, 4', Je., yel. Pultenese, 2', spr., or. 



(HI/H*. C'allistachys Ian- retusum, 2', My., or. 



ceolata, longifolia, ov- ("'.'/ ovalifolium). 



ata, and retusa). scan'dens, 3', Ap., yel. 

 ellipticum, 3', Jy., yel. (*//. Mirbelia Baxter! 

 augustifolium, a fine, and Podolobium scan- 

 long-leaved form (syn. dens). 



urliorescens). trilobatum, 2', Apr., yel. 



lineare, 2', Oct., yel. or (-//*. Podolobium trilo- 



red (tyn. Callistachys batum and Pulteneea 



lineare). ilicifolia). 



Other Species : 



acutum, 2', Men., red, spr., yel., pur. (syn. 



yi'l. (XI/H. Gastrolobium obovatum). 



acutum). ovalifolium (see retusum). 



arboivscens (see ellipticum staurophyllum, 2', Ap., 



var.). yel. (KI/II. Podolobium 



capitatum, 2', Je., yel. staurophyllum). 



cuueatum obovatum, 2', virgatum, U', My., or. 

 sc. (xt/H. Gastrolobium 

 retusum) . 



OXYPETALUM. 



Stove evergreen twiners (ord. Asclepiades). 

 Propagation, by cuttings in sand, beneath a bell- 

 glass, over bottom heat. Soil, fibrous peat and 

 sandy loam. 



Principal Species : 



Banksii, 6', Je., pur. solanoides, 6', Je., bl., ro., 



cteruleum, 3', Jy., bl. or pur. (syn*. Tweedia 



(tyns. Tweedia cu-rulea floribunda', T. pubes- 



aud T. vcrsicolor). cens, and T. rosea). 



Oxygnninm (sen Asplenium). 

 Oxyrampltii (see Lespedeza). 



OXYSPORA. 



Stove evergreen shrubs (ord. Melastomacese). 

 Propagation, by cuttings of young shoots in sandy 

 peat, beneath a bell -gUiss, over bottom heat. Soil, 

 fibrous loam, sandy peat, and charcoal. 



Principal Species : 



paniculata, 3' to !', Je., red (syn. vagans). 



OXYSTELMA. 



Stove evergreen twiners (ord. Asclepiadese). Prop- 

 agation, by cuttings in spring, in sand, beneath a 

 bell-glass, over bottom heat. Soil, sandy peat and 

 fibrous loam. 



Principal Species : 



esculentum, 4', My., wh., spotted pur. 



OXYTENANTHERA. 



Stove plants (ord. Gramineaj) of graceful appear- 

 ance, closely allied to the Bambusas, and, like them, 

 requiring rich loam and plenty of moisture to grow 

 in. Propagation is by division or stem cuttings. 

 The best known species is abyssinica, which grows 

 to a good height, its stems furnishing spear shafts 

 and canoe poles in some parts of tropical Africa. 



OXYTROPIS. 



Hardy herbaceous perennials (ord. Leguminosaa). 

 Propagation, by seeds, division, and cuttings. 

 Soil, well-drained, sandy loam. Positions in a rock 

 garden where the plants are exposed to full sun- 

 shine will suit these pretty little plants admirably. 



Principal Species : 



cyanea, 6", Je., Jy., pur. montana, 6", Je., Jy., 



bl. 1'ur., yel. 



Lambertii, 1', My., Aug., pifosa, 6", Jy., yel. 



varying from wh. pyreuaica, 6 1 ', sum., pur., 



through bl. to pur. HI., or bl. 



urolensis, 4". My., Jy., 

 pur. (ay ii. Halleri). 



Other Species : 



campestris, 6", Jy., yel., ochroleuca, 6", sum., yel., 



tiuged pur. wh. 



fostida, 6", Jy., pur. sulphurea, 6", Jy., cream, 



grandiflora, 6", Jy., ro. yel. 



Greenhouse evergreen shrubs (ord. Composite). 

 Propagation, by cuttings. Soil, fibrous loam, peat, 

 and sand. 



Principal Species : 



bupthalmoides, 3', Sep., yel. 



OYSTER SHELL BARK LOUSE. 



This (Mytilaspis Pomorum, also known as the 

 Mussel Scale) is troublesome on the bark of 

 Apple and Pear trees, particularly those in an 

 unhealthy condition. The mature scale is dark 

 brown in colour, paler at the end. The eggs are 

 hatched in May, the insects spreading to the 

 younger branches in search of food. For small 

 trees and light attacks, the best remedy is scrubbing 

 the branches in winter with a soap and paraffin 

 mixture. The trees should also be syringed in 

 February with the caustic potash wash. (See 

 INSECTICIDES.) 



Oxynra (see Layia ralliglotta). 

 Oyster Plant (see Mertensia maritima). 

 Oyster, Vegetable (see Salsify). 

 OzapJiyUum (sec Tirorea). 

 Ozothammts (see HeUcJtryium). 



